264 lines
7.2 KiB
LLVM
264 lines
7.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -correlated-propagation -S | FileCheck %s
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define i8 @simple(i1) {
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; CHECK-LABEL: @simple(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[S:%.*]] = select i1 [[TMP0:%.*]], i8 0, i8 1
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; CHECK-NEXT: br i1 [[TMP0]], label [[THEN:%.*]], label [[ELSE:%.*]]
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; CHECK: then:
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; CHECK-NEXT: ret i8 0
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; CHECK: else:
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; CHECK-NEXT: ret i8 1
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;
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entry:
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%s = select i1 %0, i8 0, i8 1
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br i1 %0, label %then, label %else
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then:
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%a = phi i8 [ %s, %entry ]
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ret i8 %a
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else:
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%b = phi i8 [ %s, %entry ]
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ret i8 %b
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}
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define void @loop(i32) {
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; CHECK-LABEL: @loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IDX:%.*]] = phi i32 [ [[TMP0:%.*]], [[ENTRY:%.*]] ], [ [[TMP2:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[IDX]], 0
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; CHECK-NEXT: [[TMP2]] = add i32 [[IDX]], -1
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 0, i32 [[TMP2]]
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; CHECK-NEXT: br i1 [[TMP1]], label [[OUT:%.*]], label [[LOOP]]
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; CHECK: out:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%idx = phi i32 [ %0, %entry ], [ %sel, %loop ]
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%1 = icmp eq i32 %idx, 0
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%2 = add i32 %idx, -1
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%sel = select i1 %1, i32 0, i32 %2
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br i1 %1, label %out, label %loop
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out:
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ret void
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}
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define i8 @not_correlated(i1, i1) {
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; CHECK-LABEL: @not_correlated(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[S:%.*]] = select i1 [[TMP0:%.*]], i8 0, i8 1
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; CHECK-NEXT: br i1 [[TMP1:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
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; CHECK: then:
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; CHECK-NEXT: ret i8 [[S]]
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; CHECK: else:
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; CHECK-NEXT: ret i8 [[S]]
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;
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entry:
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%s = select i1 %0, i8 0, i8 1
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br i1 %1, label %then, label %else
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then:
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%a = phi i8 [ %s, %entry ]
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ret i8 %a
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else:
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%b = phi i8 [ %s, %entry ]
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ret i8 %b
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}
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@c = global i32 0, align 4
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@b = global i32 0, align 4
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define i32 @PR23752() {
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; CHECK-LABEL: @PR23752(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[SEL:%.*]] = select i1 icmp sgt (i32* @b, i32* @c), i32 0, i32 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[SEL]], 1
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
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; CHECK: if.end:
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; CHECK-NEXT: ret i32 1
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;
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entry:
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br label %for.body
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for.body:
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%phi = phi i32 [ 0, %entry ], [ %sel, %for.body ]
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%sel = select i1 icmp sgt (i32* @b, i32* @c), i32 %phi, i32 1
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%cmp = icmp ne i32 %sel, 1
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br i1 %cmp, label %for.body, label %if.end
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if.end:
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ret i32 %sel
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}
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define i1 @test1(i32* %p, i1 %unknown) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[UNKNOWN:%.*]], i32 [[PVAL]], i32 5
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; CHECK-NEXT: ret i1 false
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp slt i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%min = select i1 %unknown, i32 %pval, i32 5
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%res = icmp eq i32 %min, 255
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ret i1 %res
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exit:
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ret i1 true
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}
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; Check that we take a conservative meet
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define i1 @test2(i32* %p, i32 %qval, i1 %unknown) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[UNKNOWN:%.*]], i32 [[PVAL]], i32 [[QVAL:%.*]]
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; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[MIN]], 255
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; CHECK-NEXT: ret i1 [[RES]]
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp slt i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%min = select i1 %unknown, i32 %pval, i32 %qval
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%res = icmp eq i32 %min, 255
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ret i1 %res
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exit:
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ret i1 true
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}
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; Same as @test2, but for the opposite select input
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define i1 @test3(i32* %p, i32 %qval, i1 %unknown) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[UNKNOWN:%.*]], i32 [[QVAL:%.*]], i32 [[PVAL]]
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; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[MIN]], 255
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; CHECK-NEXT: ret i1 [[RES]]
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp slt i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%min = select i1 %unknown, i32 %qval, i32 %pval
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%res = icmp eq i32 %min, 255
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ret i1 %res
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exit:
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ret i1 true
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}
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; Conflicting constants (i.e. isOverdefined result)
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; NOTE: Using doubles in this version is a bit of a hack. This
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; is to get around the fact that all integers (including constants
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; and non-constants) are actually represented as constant-ranges.
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define i1 @test4(i32* %p, i32 %qval, i1 %unknown) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[UNKNOWN:%.*]], double 1.000000e+00, double 0.000000e+00
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; CHECK-NEXT: [[RES:%.*]] = fcmp oeq double [[MIN]], 3.000000e+02
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; CHECK-NEXT: ret i1 [[RES]]
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp slt i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%min = select i1 %unknown, double 1.0, double 0.0
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%res = fcmp oeq double %min, 300.0
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ret i1 %res
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exit:
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ret i1 true
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}
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;; Using the condition to clamp the result
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;;
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define i1 @test5(i32* %p, i1 %unknown) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[COND:%.*]] = icmp sgt i32 [[PVAL]], 0
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; CHECK-NEXT: [[MIN:%.*]] = select i1 [[COND]], i32 [[PVAL]], i32 5
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; CHECK-NEXT: ret i1 false
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp slt i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%cond = icmp sgt i32 %pval, 0
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%min = select i1 %cond, i32 %pval, i32 5
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%res = icmp eq i32 %min, -1
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ret i1 %res
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exit:
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ret i1 true
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}
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define i1 @test6(i32* %p, i1 %unknown) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[PVAL:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[PVAL]], 255
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; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[PVAL]], 254
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND]], i32 [[PVAL]], i32 1
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; CHECK-NEXT: ret i1 true
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; CHECK: exit:
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; CHECK-NEXT: ret i1 true
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;
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%pval = load i32, i32* %p
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%cmp1 = icmp ult i32 %pval, 255
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br i1 %cmp1, label %next, label %exit
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next:
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%cond = icmp ne i32 %pval, 254
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%sel = select i1 %cond, i32 %pval, i32 1
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%res = icmp slt i32 %sel, 254
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ret i1 %res
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exit:
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ret i1 true
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}
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