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Enhance alias analysis for atomic instructions a bit. Upgrade a couple alias-analysis tests to the new atomic instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140557 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-09-26 20:15:28 +00:00
parent 22d54da918
commit 46cb5afdcd
4 changed files with 46 additions and 14 deletions
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4
test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll
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@@ -1,14 +1,12 @@
; 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)
%Y = atomicrmw add i8* %Q, i8 1 monotonic
%Z = load i8* %P
; CHECK-NOT: = load
%A = sub i8 %X, %Z