| Dan Gohman | 02538ac | 2010-10-18 18:04:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -gvn -S | FileCheck %s |
| Owen Anderson | 2b2bd28 | 2009-10-28 07:05:35 +0000 | [diff] [blame] | 2 | |
| 3 | target 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" |
| 4 | target triple = "i386-apple-darwin7" |
| 5 | |
| 6 | define i8 @test(i8* %P) nounwind { |
| Owen Anderson | b9878ee | 2009-12-02 07:35:19 +0000 | [diff] [blame] | 7 | ; CHECK: lifetime.start |
| Owen Anderson | 2b2bd28 | 2009-10-28 07:05:35 +0000 | [diff] [blame] | 8 | ; CHECK-NOT: load |
| Owen Anderson | b9878ee | 2009-12-02 07:35:19 +0000 | [diff] [blame] | 9 | ; CHECK: lifetime.end |
| Owen Anderson | 2b2bd28 | 2009-10-28 07:05:35 +0000 | [diff] [blame] | 10 | entry: |
| 11 | call void @llvm.lifetime.start(i64 32, i8* %P) |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 12 | %0 = load i8, i8* %P |
| Owen Anderson | 2b2bd28 | 2009-10-28 07:05:35 +0000 | [diff] [blame] | 13 | store i8 1, i8* %P |
| 14 | call void @llvm.lifetime.end(i64 32, i8* %P) |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 15 | %1 = load i8, i8* %P |
| Owen Anderson | 2b2bd28 | 2009-10-28 07:05:35 +0000 | [diff] [blame] | 16 | ret i8 %1 |
| 17 | } |
| 18 | |
| Nick Lewycky | d4c0f86 | 2010-04-17 21:12:55 +0000 | [diff] [blame] | 19 | declare void @llvm.lifetime.start(i64 %S, i8* nocapture %P) readonly |
| Chris Lattner | 3ae2dd2 | 2010-04-07 22:53:17 +0000 | [diff] [blame] | 20 | declare void @llvm.lifetime.end(i64 %S, i8* nocapture %P) |