04b944e230
The only interesting test change is in @PR31262, where the following fold is now performed, while it previously was not: https://alive2.llvm.org/ce/z/a5Qmr6 llvm/test/Transforms/InstSimplify/ConstProp/gep.ll has not been updated, because there is a tradeoff between folding and inrange preservation there that we may want to discuss. Updates have been performed using: https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34
59 lines
1.8 KiB
LLVM
59 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
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target datalayout = "p:32:32"
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define i1 @test1(i1 %V) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i1 [[V:%.*]]
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;
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entry:
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%Z = zext i1 %V to i32
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%T = trunc i32 %Z to i1
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ret i1 %T
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}
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define ptr @test2(ptr %V) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret ptr [[V:%.*]]
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;
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entry:
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ret ptr %V
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}
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define ptr @test3(ptr %V) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret ptr [[V:%.*]]
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;
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entry:
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ret ptr %V
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}
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define i32 @test4() {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret i32 4
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;
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%alloca = alloca i32, align 4 ; alloca + 0
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%gep = getelementptr inbounds i32, ptr %alloca, i32 1 ; alloca + 4
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%pti = ptrtoint ptr %alloca to i32 ; alloca
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%sub = sub i32 0, %pti ; -alloca
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%add = getelementptr [4 x i8], ptr %gep, i32 0, i32 %sub ; alloca + 4 - alloca == 4
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%add_to_int = ptrtoint ptr %add to i32 ; 4
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ret i32 %add_to_int ; 4
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}
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define i32 @test5() {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret i32 3
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;
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%alloca = alloca i32, align 4 ; alloca + 0
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%gep = getelementptr inbounds i32, ptr %alloca, i32 1 ; alloca + 4
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%pti = ptrtoint ptr %alloca to i32 ; alloca
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%sub = xor i32 %pti, -1 ; ~alloca
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%add = getelementptr [4 x i8], ptr %gep, i32 0, i32 %sub ; alloca + 4 - alloca - 1 == 3
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%add_to_int = ptrtoint ptr %add to i32 ; 4
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ret i32 %add_to_int ; 4
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}
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