361111906b
Poison-generating flags can be retained during CSE on the earlier instruction , *if* the earlier instruction being poison causes UB. For now, always take AND for floating point instructions. https://alive2.llvm.org/ce/z/4K3D7P Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D115247
50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -early-cse -earlycse-debug-hash -S < %s | FileCheck %s
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; RUN: opt -basic-aa -early-cse-memssa -S < %s | FileCheck %s
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declare void @use(i1)
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define void @test1(float %x, float %y) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[CMP1:%.*]] = fcmp oeq float [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: call void @use(i1 [[CMP1]])
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; CHECK-NEXT: call void @use(i1 [[CMP1]])
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; CHECK-NEXT: ret void
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;
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%cmp1 = fcmp nnan oeq float %y, %x
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%cmp2 = fcmp oeq float %x, %y
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call void @use(i1 %cmp1)
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call void @use(i1 %cmp2)
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ret void
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}
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declare void @use.i8(i8*)
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define void @test_inbounds_program_ub_if_first_gep_poison(i8* %ptr, i64 %n) {
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; CHECK-LABEL: @test_inbounds_program_ub_if_first_gep_poison(
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; CHECK-NEXT: [[ADD_PTR_1:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 [[N:%.*]]
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; CHECK-NEXT: call void @use.i8(i8* noundef [[ADD_PTR_1]])
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; CHECK-NEXT: call void @use.i8(i8* [[ADD_PTR_1]])
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; CHECK-NEXT: ret void
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;
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%add.ptr.1 = getelementptr inbounds i8, i8* %ptr, i64 %n
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call void @use.i8(i8* noundef %add.ptr.1)
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%add.ptr.2 = getelementptr i8, i8* %ptr, i64 %n
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call void @use.i8(i8* %add.ptr.2)
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ret void
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}
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define void @test_inbounds_program_not_ub_if_first_gep_poison(i8* %ptr, i64 %n) {
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; CHECK-LABEL: @test_inbounds_program_not_ub_if_first_gep_poison(
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; CHECK-NEXT: [[ADD_PTR_1:%.*]] = getelementptr i8, i8* [[PTR:%.*]], i64 [[N:%.*]]
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; CHECK-NEXT: call void @use.i8(i8* [[ADD_PTR_1]])
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; CHECK-NEXT: call void @use.i8(i8* [[ADD_PTR_1]])
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; CHECK-NEXT: ret void
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;
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%add.ptr.1 = getelementptr inbounds i8, i8* %ptr, i64 %n
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call void @use.i8(i8* %add.ptr.1)
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%add.ptr.2 = getelementptr i8, i8* %ptr, i64 %n
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call void @use.i8(i8* %add.ptr.2)
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ret void
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}
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