xref: /llvm-project/llvm/test/Transforms/NewGVN/lifetime-simple.ll (revision 229640343e400394b315c6798c7c19e8a9bd188c)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
2; RUN: opt < %s -passes=newgvn -S | FileCheck %s
3
4target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
5target triple = "i386-apple-darwin7"
6
7define i8 @test(ptr %P) nounwind {
8; CHECK-LABEL: define i8 @test(
9; CHECK-SAME: ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
10; CHECK-NEXT:  entry:
11; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 32, ptr [[P]])
12; CHECK-NEXT:    store i8 1, ptr [[P]], align 1
13; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 32, ptr [[P]])
14; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr [[P]], align 1
15; CHECK-NEXT:    ret i8 [[TMP0]]
16;
17entry:
18  call void @llvm.lifetime.start.p0(i64 32, ptr %P)
19  %0 = load i8, ptr %P
20  store i8 1, ptr %P
21  call void @llvm.lifetime.end.p0(i64 32, ptr %P)
22  %1 = load i8, ptr %P
23  ret i8 %1
24}
25
26declare void @llvm.lifetime.start.p0(i64 %S, ptr nocapture %P) readonly
27declare void @llvm.lifetime.end.p0(i64 %S, ptr nocapture %P)
28