169 lines
4.8 KiB
LLVM
169 lines
4.8 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -gvn < %s | FileCheck %s
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define i32 @test(i32* %p, i32 %v) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret i32 [[V]]
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;
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%load = load i32, i32* %p
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%c = icmp eq i32 %load, %v
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call void @llvm.assume(i1 %c)
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ret i32 %load
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}
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define i32 @reverse(i32* %p, i32 %v) {
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; CHECK-LABEL: @reverse(
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret i32 [[V]]
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;
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%load = load i32, i32* %p
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%c = icmp eq i32 %load, %v
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call void @llvm.assume(i1 %c)
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ret i32 %v
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}
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; Lack of equivalance due to +0.0 vs -0.0
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define float @neg_float_oeq(float* %p, float %v) {
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; CHECK-LABEL: @neg_float_oeq(
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; CHECK-NEXT: [[LOAD:%.*]] = load float, float* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret float [[LOAD]]
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;
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%load = load float, float* %p
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%c = fcmp oeq float %load, %v
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call void @llvm.assume(i1 %c)
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ret float %load
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}
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; Lack of equivalance due to +0.0 vs -0.0
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define float @neg_float_ueq(float* %p, float %v) {
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; CHECK-LABEL: @neg_float_ueq(
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; CHECK-NEXT: [[LOAD:%.*]] = load float, float* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fcmp ueq float [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret float [[LOAD]]
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;
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%load = load float, float* %p
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%c = fcmp ueq float %load, %v
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call void @llvm.assume(i1 %c)
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ret float %load
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}
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define float @float_oeq_constant(float* %p) {
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; CHECK-LABEL: @float_oeq_constant(
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; CHECK-NEXT: [[LOAD:%.*]] = load float, float* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[LOAD]], 5.000000e+00
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret float 5.000000e+00
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;
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%load = load float, float* %p
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%c = fcmp oeq float %load, 5.0
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call void @llvm.assume(i1 %c)
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ret float %load
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}
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; Lack of equivalance due to Nan
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define float @neq_float_ueq_constant(float* %p) {
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; CHECK-LABEL: @neq_float_ueq_constant(
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; CHECK-NEXT: [[LOAD:%.*]] = load float, float* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fcmp ueq float [[LOAD]], 5.000000e+00
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret float [[LOAD]]
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;
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%load = load float, float* %p
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%c = fcmp ueq float %load, 5.0
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call void @llvm.assume(i1 %c)
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ret float %load
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}
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define float @float_ueq_constant_nnas(float* %p) {
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; CHECK-LABEL: @float_ueq_constant_nnas(
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; CHECK-NEXT: [[LOAD:%.*]] = load float, float* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fcmp nnan ueq float [[LOAD]], 5.000000e+00
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret float 5.000000e+00
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;
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%load = load float, float* %p
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%c = fcmp nnan ueq float %load, 5.0
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call void @llvm.assume(i1 %c)
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ret float %load
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}
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define i32 @test2(i32* %p, i32 %v) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: ret i32 [[V]]
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;
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%load = load i32, i32* %p
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%c = icmp eq i32 %load, %v
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call void @llvm.assume(i1 %c)
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%load2 = load i32, i32* %p
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ret i32 %load2
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}
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define i32 @test3(i32* %p, i32 %v) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[P:%.*]]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
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; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: br label [[MERGE]]
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; CHECK: merge:
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; CHECK-NEXT: ret i32 [[V]]
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;
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%load = load i32, i32* %p
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%c = icmp eq i32 %load, %v
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call void @llvm.assume(i1 %c)
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br i1 undef, label %taken, label %merge
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taken:
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br label %merge
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merge:
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ret i32 %load
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}
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define i32 @trivial_constants(i32* %p) {
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; CHECK-LABEL: @trivial_constants(
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; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: br label [[MERGE]]
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; CHECK: merge:
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; CHECK-NEXT: ret i32 0
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;
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%c = icmp eq i32 0, 0
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call void @llvm.assume(i1 %c)
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br i1 undef, label %taken, label %merge
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taken:
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br label %merge
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merge:
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ret i32 0
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}
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define i32 @conflicting_constants(i32* %p) {
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; CHECK-LABEL: @conflicting_constants(
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; CHECK-NEXT: store i8 undef, i8* null
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; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: br label [[MERGE]]
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; CHECK: merge:
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; CHECK-NEXT: ret i32 1
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;
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%c = icmp eq i32 0, 5
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call void @llvm.assume(i1 %c)
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br i1 undef, label %taken, label %merge
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taken:
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br label %merge
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merge:
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ret i32 1
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}
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declare void @llvm.assume(i1)
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