| ; RUN: opt -basicaa -gvn -instcombine -S < %s | FileCheck %s |
| target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" |
| |
| declare i8 @llvm.atomic.load.add.i8.p0i8(i8*, i8) |
| |
| define i8 @foo(i8* %ptr) { |
| %P = getelementptr i8* %ptr, i32 0 |
| %Q = getelementptr i8* %ptr, i32 1 |
| ; CHECK: getelementptr |
| %X = load i8* %P |
| %Y = call i8 @llvm.atomic.load.add.i8.p0i8(i8* %Q, i8 1) |
| %Z = load i8* %P |
| ; CHECK-NOT: = load |
| %A = sub i8 %X, %Z |
| ret i8 %A |
| ; CHECK: ret i8 0 |
| } |
