729 lines
27 KiB
LLVM
729 lines
27 KiB
LLVM
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; RUN: opt -S -basic-aa -licm < %s | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,loop(loop-simplifycfg,licm)' -S < %s | FileCheck %s
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; RUN: opt -S -basic-aa -licm -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,loop-mssa(loop-simplifycfg,licm)' -verify-memoryssa -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; This test represents the following function:
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; void test1(int * __restrict__ a, int * __restrict__ b, int &c, int n) {
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable attribute is on %c.
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; CHECK-LABEL: @test1
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test1(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly nonnull dereferenceable(4) align 4 %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This is the same as @test1, but without the dereferenceable attribute on %c.
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; Without this attribute, we should not hoist the load of %c.
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; CHECK-LABEL: @test2
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; CHECK: if.then:
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; CHECK: load i32, i32* %c, align 4
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define void @test2(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly nonnull %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This test represents the following function:
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; void test3(int * restrict a, int * restrict b, int c[static 3], int n) {
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c[2]*b[i];
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; }
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; and we want to hoist the load of c[2] out of the loop. This can be done only
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; because the dereferenceable attribute is on %c.
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; CHECK-LABEL: @test3
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; CHECK: load i32, i32* %c2, align 4
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; CHECK: for.body:
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define void @test3(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly dereferenceable(12) align 4 %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%c2 = getelementptr inbounds i32, i32* %c, i64 2
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%1 = load i32, i32* %c2, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This is the same as @test3, but with a dereferenceable attribute on %c with a
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; size too small to cover c[2] (and so we should not hoist it).
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; CHECK-LABEL: @test4
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; CHECK: if.then:
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; CHECK: load i32, i32* %c2, align 4
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define void @test4(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly dereferenceable(11) %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%c2 = getelementptr inbounds i32, i32* %c, i64 2
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%1 = load i32, i32* %c2, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This test represents the following function:
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; void test1(int * __restrict__ a, int *b, int &c, int n) {
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; if (c != null)
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable_or_null attribute is on %c and there is a null
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; check on %c.
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; CHECK-LABEL: @test5
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test5(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) align 4 %c, i32 %n) #0 {
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entry:
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%not_null = icmp ne i32* %c, null
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br i1 %not_null, label %not.null, label %for.end
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not.null:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %not.null, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry, %not.null
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ret void
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}
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; This is the same as @test5, but without the null check on %c.
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; Without this check, we should not hoist the load of %c.
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; This test case has an icmp on c but the use of this comparison is
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; not a branch.
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; CHECK-LABEL: @test6
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; CHECK: if.then:
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; CHECK: load i32, i32* %c, align 4
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define i1 @test6(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n) #0 {
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entry:
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%not_null = icmp ne i32* %c, null
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret i1 %not_null
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}
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; This test represents the following function:
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; void test1(int * __restrict__ a, int *b, int **cptr, int n) {
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; c = *cptr;
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = (*c)*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable meatdata on the c = *cptr load.
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; CHECK-LABEL: @test7
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test7(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
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entry:
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%c = load i32*, i32** %cptr, !dereferenceable !0, !align !{i64 4}
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; This test represents the following function:
|
||
|
|
; void test1(int * __restrict__ a, int *b, int **cptr, int n) {
|
||
|
|
; c = *cptr;
|
||
|
|
; if (c != null)
|
||
|
|
; for (int i = 0; i < n; ++i)
|
||
|
|
; if (a[i] > 0)
|
||
|
|
; a[i] = (*c)*b[i];
|
||
|
|
; }
|
||
|
|
; and we want to hoist the load of %c out of the loop. This can be done only
|
||
|
|
; because the dereferenceable_or_null meatdata on the c = *cptr load and there
|
||
|
|
; is a null check on %c.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test8
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
; CHECK: for.body:
|
||
|
|
|
||
|
|
define void @test8(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
|
||
|
|
entry:
|
||
|
|
%c = load i32*, i32** %cptr, !dereferenceable_or_null !0, !align !{i64 4}
|
||
|
|
%not_null = icmp ne i32* %c, null
|
||
|
|
br i1 %not_null, label %not.null, label %for.end
|
||
|
|
|
||
|
|
not.null:
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %not.null, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry, %not.null
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; This is the same as @test8, but without the null check on %c.
|
||
|
|
; Without this check, we should not hoist the load of %c.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test9
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
|
||
|
|
define void @test9(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
|
||
|
|
entry:
|
||
|
|
%c = load i32*, i32** %cptr, !dereferenceable_or_null !0
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; In this test we should be able to only hoist load from %cptr. We can't hoist
|
||
|
|
; load from %c because it's dereferenceability can depend on %cmp1 condition.
|
||
|
|
; By moving it out of the loop we break this dependency and can not rely
|
||
|
|
; on the dereferenceability anymore.
|
||
|
|
; In other words this test checks that we strip dereferenceability metadata
|
||
|
|
; after hoisting an instruction.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test10
|
||
|
|
; CHECK: %c = load i32*, i32** %cptr
|
||
|
|
; CHECK-NOT: dereferenceable
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
|
||
|
|
define void @test10(i32* noalias %a, i32* %b, i32** dereferenceable(8) align 8 %cptr, i32 %n) #0 {
|
||
|
|
entry:
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%c = load i32*, i32** %cptr, !dereferenceable !0
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @test11(i32* noalias %a, i32* %b, i32** dereferenceable(8) %cptr, i32 %n) #0 {
|
||
|
|
; CHECK-LABEL: @test11(
|
||
|
|
entry:
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
; CHECK: for.body.preheader:
|
||
|
|
; CHECK: %c = load i32*, i32** %cptr, align 8, !dereferenceable !0
|
||
|
|
; CHECK: %d = load i32, i32* %c, align 4
|
||
|
|
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
%c = load i32*, i32** %cptr, !dereferenceable !0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%d = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%e = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %e, %d
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.experimental.guard(i1, ...)
|
||
|
|
|
||
|
|
define void @test12(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) align 4 %c, i32 %n) #0 {
|
||
|
|
; Prove non-null ness of %c via a guard, not a branch.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test12(
|
||
|
|
entry:
|
||
|
|
%not_null = icmp ne i32* %c, null
|
||
|
|
call void(i1, ...) @llvm.experimental.guard(i1 %not_null) [ "deopt"() ]
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
; CHECK: for.body.preheader:
|
||
|
|
; CHECK-NEXT: [[VAL:%[^ ]]] = load i32, i32* %c, align 4
|
||
|
|
; CHECK-NEXT: br label %for.body
|
||
|
|
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @test13(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n) #0 {
|
||
|
|
; Like @test12, but has a post-dominating guard, which cannot be used
|
||
|
|
; to prove %c is nonnull at the point of the load.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test13(
|
||
|
|
entry:
|
||
|
|
%not_null = icmp ne i32* %c, null
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
; CHECK: for.body.preheader:
|
||
|
|
; CHECK-NOT: load i32, i32* %c
|
||
|
|
; CHECK: br label %for.body
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK: load i32, i32* %c
|
||
|
|
; CHECK: br label %for.inc
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry, %entry
|
||
|
|
call void(i1, ...) @llvm.experimental.guard(i1 %not_null) [ "deopt"() ]
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check that branch by condition "null check AND something" allows to hoist the
|
||
|
|
; load.
|
||
|
|
define void @test14(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) align 4 %c, i32 %n, i1 %dummy_cond) #0 {
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test14
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
; CHECK: for.body:
|
||
|
|
|
||
|
|
entry:
|
||
|
|
%not_null = icmp ne i32* %c, null
|
||
|
|
%dummy_and = and i1 %not_null, %dummy_cond
|
||
|
|
br i1 %dummy_and, label %not.null, label %for.end
|
||
|
|
|
||
|
|
not.null:
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %not.null, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry, %not.null
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check that guard by condition "null check AND something" allows to hoist the
|
||
|
|
; load.
|
||
|
|
define void @test15(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) align 4 %c, i32 %n, i1 %dummy_cond) #0 {
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test15
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
; CHECK: for.body:
|
||
|
|
|
||
|
|
entry:
|
||
|
|
%not_null = icmp ne i32* %c, null
|
||
|
|
%dummy_and = and i1 %not_null, %dummy_cond
|
||
|
|
call void(i1, ...) @llvm.experimental.guard(i1 %dummy_and) [ "deopt"() ]
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Ensure that (c == null && other_cond) does not automatically mean that c is
|
||
|
|
; non-null in false branch. So the condition ((c == null && other_cond) == false)
|
||
|
|
; is not sufficient to conclude that c != null.
|
||
|
|
define void @test16(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n, i1 %dummy_cond) #0 {
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test16
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
|
||
|
|
entry:
|
||
|
|
%not_null = icmp eq i32* %c, null
|
||
|
|
%dummy_and = and i1 %not_null, %dummy_cond
|
||
|
|
br i1 %dummy_and, label %for.end, label %not.null
|
||
|
|
|
||
|
|
not.null:
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.body: ; preds = %not.null, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry, %not.null
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Ensure that (c == null && other_cond) does not automatically mean that c is
|
||
|
|
; non-null in false branch. So the condition ((c == null && other_cond) == false)
|
||
|
|
; is not sufficient to conclude that c != null.
|
||
|
|
define void @test17(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n, i1 %dummy_cond) #0 {
|
||
|
|
|
||
|
|
; CHECK-LABEL: @test17
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK: load i32, i32* %c, align 4
|
||
|
|
|
||
|
|
entry:
|
||
|
|
%not_null = icmp eq i32* %c, null
|
||
|
|
%dummy_and = and i1 %not_null, %dummy_cond
|
||
|
|
call void(i1, ...) @llvm.experimental.guard(i1 %dummy_and) [ "deopt"() ]
|
||
|
|
%cmp11 = icmp sgt i32 %n, 0
|
||
|
|
br i1 %cmp11, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.inc
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%cmp1 = icmp sgt i32 %0, 0
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then: ; preds = %for.body
|
||
|
|
%1 = load i32, i32* %c, align 4
|
||
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
||
|
|
%mul = mul nsw i32 %2, %1
|
||
|
|
store i32 %mul, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body, %if.then
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
||
|
|
%exitcond = icmp eq i32 %lftr.wideiv, %n
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
for.end: ; preds = %for.inc, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
attributes #0 = { nounwind uwtable }
|
||
|
|
!0 = !{i64 4}
|