derek.holloway
7502bf64a4
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93 lines
3.3 KiB
LLVM
93 lines
3.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -passes=gvn -S | FileCheck %s
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define i8 @test() nounwind {
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; CHECK-LABEL: define i8 @test(
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; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[P:%.*]] = alloca [32 x i8], align 1
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[P]])
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; CHECK-NEXT: store i8 1, ptr [[P]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[P]])
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; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[P]], align 1
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; CHECK-NEXT: ret i8 [[TMP0]]
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;
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entry:
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%P = alloca [32 x i8]
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call void @llvm.lifetime.start.p0(ptr %P)
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%0 = load i8, ptr %P
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store i8 1, ptr %P
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call void @llvm.lifetime.end.p0(ptr %P)
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%1 = load i8, ptr %P
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ret i8 %1
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}
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define void @assume_eq_arg(ptr %arg) {
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; CHECK-LABEL: define void @assume_eq_arg(
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; CHECK-SAME: ptr [[ARG:%.*]]) {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[ALLOCA]], [[ARG]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr [[ALLOCA]], align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[ALLOCA]])
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32
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%cmp = icmp eq ptr %alloca, %arg
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call void @llvm.assume(i1 %cmp)
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call void @llvm.lifetime.start.p0(ptr %alloca)
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store volatile i32 0, ptr %alloca
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call void @llvm.lifetime.end.p0(ptr %alloca)
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ret void
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}
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define void @assume_eq_null() {
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; CHECK-LABEL: define void @assume_eq_null() {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32, addrspace(1)
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%cmp = icmp eq ptr addrspace(1) %alloca, null
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call void @llvm.assume(i1 %cmp)
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call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)
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store volatile i32 0, ptr addrspace(1) %alloca
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call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)
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ret void
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}
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define void @dom_eq_null() {
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; CHECK-LABEL: define void @dom_eq_null() {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null
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; CHECK-NEXT: br i1 [[CMP]], label %[[IF:.*]], label %[[ELSE:.*]]
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; CHECK: [[IF]]:
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; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: ret void
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; CHECK: [[ELSE]]:
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32, addrspace(1)
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%cmp = icmp eq ptr addrspace(1) %alloca, null
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br i1 %cmp, label %if, label %else
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if:
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call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)
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store volatile i32 0, ptr addrspace(1) %alloca
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call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)
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ret void
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else:
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ret void
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}
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declare void @llvm.lifetime.start.p0(ptr nocapture %P) readonly
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declare void @llvm.lifetime.end.p0(ptr nocapture %P)
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