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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt < %s -passes=gvn -S | FileCheck %s3 4define i8 @test() nounwind {5; CHECK-LABEL: define i8 @test(6; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {7; CHECK-NEXT: [[ENTRY:.*:]]8; CHECK-NEXT: [[P:%.*]] = alloca [32 x i8], align 19; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[P]])10; CHECK-NEXT: store i8 1, ptr [[P]], align 111; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[P]])12; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[P]], align 113; CHECK-NEXT: ret i8 [[TMP0]]14;15entry:16 %P = alloca [32 x i8]17 call void @llvm.lifetime.start.p0(ptr %P)18 %0 = load i8, ptr %P19 store i8 1, ptr %P20 call void @llvm.lifetime.end.p0(ptr %P)21 %1 = load i8, ptr %P22 ret i8 %123}24 25define void @assume_eq_arg(ptr %arg) {26; CHECK-LABEL: define void @assume_eq_arg(27; CHECK-SAME: ptr [[ARG:%.*]]) {28; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 429; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[ALLOCA]], [[ARG]]30; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])31; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[ALLOCA]])32; CHECK-NEXT: store volatile i32 0, ptr [[ALLOCA]], align 433; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[ALLOCA]])34; CHECK-NEXT: ret void35;36 %alloca = alloca i3237 %cmp = icmp eq ptr %alloca, %arg38 call void @llvm.assume(i1 %cmp)39 call void @llvm.lifetime.start.p0(ptr %alloca)40 store volatile i32 0, ptr %alloca41 call void @llvm.lifetime.end.p0(ptr %alloca)42 ret void43}44 45define void @assume_eq_null() {46; CHECK-LABEL: define void @assume_eq_null() {47; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)48; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null49; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])50; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])51; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 452; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])53; CHECK-NEXT: ret void54;55 %alloca = alloca i32, addrspace(1)56 %cmp = icmp eq ptr addrspace(1) %alloca, null57 call void @llvm.assume(i1 %cmp)58 call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)59 store volatile i32 0, ptr addrspace(1) %alloca60 call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)61 ret void62}63 64define void @dom_eq_null() {65; CHECK-LABEL: define void @dom_eq_null() {66; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)67; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null68; CHECK-NEXT: br i1 [[CMP]], label %[[IF:.*]], label %[[ELSE:.*]]69; CHECK: [[IF]]:70; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])71; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 472; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])73; CHECK-NEXT: ret void74; CHECK: [[ELSE]]:75; CHECK-NEXT: ret void76;77 %alloca = alloca i32, addrspace(1)78 %cmp = icmp eq ptr addrspace(1) %alloca, null79 br i1 %cmp, label %if, label %else80 81if:82 call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)83 store volatile i32 0, ptr addrspace(1) %alloca84 call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)85 ret void86 87else:88 ret void89}90 91declare void @llvm.lifetime.start.p0(ptr nocapture %P) readonly92declare void @llvm.lifetime.end.p0(ptr nocapture %P)93