llvm-6502/test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll
2009-10-14 19:02:13 +00:00

17 lines
398 B
LLVM

; RUN: opt -gvn -instcombine -S < %s | FileCheck %s
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
}