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llvm-mirror/test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll
Dan Gohman 6aff5b94ff Make BasicAliasAnalysis a normal AliasAnalysis implementation which
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.

llvm-svn: 116720
2010-10-18 18:04:47 +00:00

18 lines
536 B
LLVM

; 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
}