373 lines
12 KiB
LLVM
373 lines
12 KiB
LLVM
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; RUN: opt < %s -loop-unroll -pragma-unroll-threshold=1024 -S | FileCheck -check-prefixes=CHECK,REM %s
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; RUN: opt < %s -loop-unroll -loop-unroll -pragma-unroll-threshold=1024 -S | FileCheck -check-prefixes=CHECK,REM %s
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; RUN: opt < %s -loop-unroll -unroll-allow-remainder=0 -pragma-unroll-threshold=1024 -S | FileCheck -check-prefixes=CHECK,NOREM %s
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;
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; Run loop unrolling twice to verify that loop unrolling metadata is properly
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; removed and further unrolling is disabled after the pass is run once.
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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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; loop4 contains a small loop which should be completely unrolled by
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; the default unrolling heuristics. It serves as a control for the
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; unroll(disable) pragma test loop4_with_disable.
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;
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; CHECK-LABEL: @loop4(
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; CHECK-NOT: br i1
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define void @loop4(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 4
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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; #pragma clang loop unroll(disable)
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;
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; CHECK-LABEL: @loop4_with_disable(
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; CHECK: store i32
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; CHECK-NOT: store i32
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; CHECK: br i1
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define void @loop4_with_disable(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 4
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1
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for.end: ; preds = %for.body
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ret void
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}
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!1 = !{!1, !2}
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!2 = !{!"llvm.loop.unroll.disable"}
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; loop64 has a high enough count that it should *not* be unrolled by
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; the default unrolling heuristic. It serves as the control for the
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; unroll(full) pragma test loop64_with_.* tests below.
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;
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; CHECK-LABEL: @loop64(
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; CHECK: store i32
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; CHECK-NOT: store i32
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; CHECK: br i1
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define void @loop64(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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; #pragma clang loop unroll(full)
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; Loop should be fully unrolled.
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;
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; CHECK-LABEL: @loop64_with_full(
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; CHECK-NOT: br i1
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define void @loop64_with_full(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !3
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for.end: ; preds = %for.body
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ret void
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}
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!3 = !{!3, !4}
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!4 = !{!"llvm.loop.unroll.full"}
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; #pragma clang loop unroll_count(4)
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; Loop should be unrolled 4 times.
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;
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; CHECK-LABEL: @loop64_with_count4(
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; CHECK: store i32
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; CHECK: store i32
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; CHECK: store i32
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; CHECK: store i32
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; CHECK-NOT: store i32
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; CHECK: br i1
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define void @loop64_with_count4(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !5
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for.end: ; preds = %for.body
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ret void
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}
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!5 = !{!5, !6}
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!6 = !{!"llvm.loop.unroll.count", i32 4}
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; #pragma clang loop unroll(full)
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; Full unrolling is requested, but loop has a runtime trip count so
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; no unrolling should occur.
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;
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; CHECK-LABEL: @runtime_loop_with_full(
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; CHECK: store i32
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; CHECK-NOT: store i32
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define void @runtime_loop_with_full(i32* nocapture %a, i32 %b) {
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entry:
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%cmp3 = icmp sgt i32 %b, 0
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br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !8
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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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, %b
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !8
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for.end: ; preds = %for.body, %entry
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ret void
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}
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!8 = !{!8, !4}
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; #pragma clang loop unroll_count(4)
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; Loop has a runtime trip count. Runtime unrolling should occur and loop
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; should be duplicated (original and 4x unrolled) if remainder is allowed,
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; otherwise loop should not be unrolled.
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;
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; CHECK-LABEL: @runtime_loop_with_count4(
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; CHECK: for.body
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; CHECK: store
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; REM: store
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; REM: store
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; REM: store
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; CHECK-NOT: store
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; CHECK: br i1
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; REM: for.body.epil:
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; REM: store
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; NOREM-NOT: for.body.epil:
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; NOREM-NOT: store
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; CHECK-NOT: store
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; REM: br i1
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; NOREM-NOT: br i1
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define void @runtime_loop_with_count4(i32* nocapture %a, i32 %b) {
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entry:
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%cmp3 = icmp sgt i32 %b, 0
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br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !9
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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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, %b
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !9
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for.end: ; preds = %for.body, %entry
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ret void
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}
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!9 = !{!9, !6}
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; #pragma clang loop unroll_count(1)
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; Loop should not be unrolled
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;
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; CHECK-LABEL: @unroll_1(
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; CHECK: store i32
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; CHECK-NOT: store i32
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; CHECK: br i1
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define void @unroll_1(i32* nocapture %a, i32 %b) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 4
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !10
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for.end: ; preds = %for.body
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ret void
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}
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!10 = !{!10, !11}
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!11 = !{!"llvm.loop.unroll.count", i32 1}
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; #pragma clang loop unroll(full)
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; Loop has very high loop count (1 million) and full unrolling was requested.
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; Loop should unrolled up to the pragma threshold, but not completely.
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;
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; CHECK-LABEL: @unroll_1M(
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; CHECK: store i32
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; CHECK: store i32
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; CHECK: br i1
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define void @unroll_1M(i32* nocapture %a, i32 %b) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 1000000
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !12
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for.end: ; preds = %for.body
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ret void
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}
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!12 = !{!12, !4}
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; #pragma clang loop unroll(enable)
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; Loop should be fully unrolled.
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;
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; CHECK-LABEL: @loop64_with_enable(
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; CHECK-NOT: br i1
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define void @loop64_with_enable(i32* nocapture %a) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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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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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 64
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !13
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for.end: ; preds = %for.body
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ret void
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}
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!13 = !{!13, !14}
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!14 = !{!"llvm.loop.unroll.enable"}
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; #pragma clang loop unroll(enable)
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; Loop has a runtime trip count and should be runtime unrolled and duplicated
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; (original and 8x) if remainder is allowed, otherwise it should not be
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; unrolled.
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;
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; CHECK-LABEL: @runtime_loop_with_enable(
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; CHECK: for.body:
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; CHECK: store i32
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; REM: store i32
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; REM: store i32
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; REM: store i32
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; REM: store i32
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; REM: store i32
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; REM: store i32
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; REM: store i32
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; CHECK-NOT: store i32
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; CHECK: br i1
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; REM: for.body.epil:
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; NOREM-NOT: for.body.epil:
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; REM: store
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; CHECK-NOT: store
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; REM: br i1
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; NOREM-NOT: br i1
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define void @runtime_loop_with_enable(i32* nocapture %a, i32 %b) {
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entry:
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%cmp3 = icmp sgt i32 %b, 0
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br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !8
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 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
|
||
|
|
%inc = add nsw i32 %0, 1
|
||
|
|
store i32 %inc, i32* %arrayidx, align 4
|
||
|
|
%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, %b
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !15
|
||
|
|
|
||
|
|
for.end: ; preds = %for.body, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
!15 = !{!15, !14}
|
||
|
|
|
||
|
|
; #pragma clang loop unroll_count(3)
|
||
|
|
; Loop has a runtime trip count. Runtime unrolling should occur and loop
|
||
|
|
; should be duplicated (original and 3x unrolled) if remainder is allowed,
|
||
|
|
; otherwise it should not be unrolled.
|
||
|
|
;
|
||
|
|
; CHECK-LABEL: @runtime_loop_with_count3(
|
||
|
|
; CHECK: for.body
|
||
|
|
; CHECK: store
|
||
|
|
; REM: store
|
||
|
|
; REM: store
|
||
|
|
; CHECK-NOT: store
|
||
|
|
; CHECK: br i1
|
||
|
|
; REM: for.body.epil:
|
||
|
|
; REM: store
|
||
|
|
; NOREM-NOT: for.body.epil:
|
||
|
|
; NOREM-NOT: store
|
||
|
|
; CHECK-NOT: store
|
||
|
|
; REM: br i1
|
||
|
|
define void @runtime_loop_with_count3(i32* nocapture %a, i32 %b) {
|
||
|
|
entry:
|
||
|
|
%cmp3 = icmp sgt i32 %b, 0
|
||
|
|
br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !16
|
||
|
|
|
||
|
|
for.body: ; preds = %entry, %for.body
|
||
|
|
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%inc = add nsw i32 %0, 1
|
||
|
|
store i32 %inc, i32* %arrayidx, align 4
|
||
|
|
%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, %b
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !16
|
||
|
|
|
||
|
|
for.end: ; preds = %for.body, %entry
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
!16 = !{!16, !17}
|
||
|
|
!17 = !{!"llvm.loop.unroll.count", i32 3}
|