From 3bd5e52676681914f2cb2767da2d6ef8c168cf73 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Fri, 10 Dec 2010 20:47:03 +0000 Subject: Implement PartialAlias checking in BasicAA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121520 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Analysis/TypeBasedAliasAnalysis/precedence.ll | 29 ++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) (limited to 'test/Analysis') diff --git a/test/Analysis/TypeBasedAliasAnalysis/precedence.ll b/test/Analysis/TypeBasedAliasAnalysis/precedence.ll index 9fa859e..ade39f7 100644 --- a/test/Analysis/TypeBasedAliasAnalysis/precedence.ll +++ b/test/Analysis/TypeBasedAliasAnalysis/precedence.ll @@ -1,5 +1,5 @@ -; RUN: opt -enable-tbaa -basicaa -tbaa -gvn -instcombine -S < %s | grep {ret i32 0} -; RUN: opt -enable-tbaa -tbaa -basicaa -gvn -instcombine -S < %s | grep {ret i32 1075000115} +; RUN: opt -enable-tbaa -basicaa -tbaa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=TBAA +; RUN: opt -enable-tbaa -tbaa -basicaa -gvn -instcombine -S < %s | FileCheck %s --check-prefix=BASICAA ; According to the TBAA metadata the load and store don't alias. However, ; according to the actual code, they do. The order of the alias analysis @@ -7,6 +7,12 @@ target datalayout = "e-p:64:64:64" +; Test for simple MustAlias aliasing. + +; TBAA: @trouble +; TBAA: ret i32 0 +; BASICAA: @trouble +; BASICAA: ret i32 1075000115 define i32 @trouble(i32* %x) nounwind { entry: store i32 0, i32* %x, !tbaa !0 @@ -16,6 +22,25 @@ entry: ret i32 %tmp3 } +; Test for PartialAlias aliasing. GVN doesn't yet eliminate the load +; in the BasicAA case. + +; TBAA: @offset +; TBAA: ret i64 0 +; BASICAA: @offset +; BASICAA: ret i64 %tmp3 +define i64 @offset(i64* %x) nounwind { +entry: + store i64 0, i64* %x, !tbaa !4 + %0 = bitcast i64* %x to i8* + %1 = getelementptr i8* %0, i64 1 + store i8 1, i8* %1, !tbaa !5 + %tmp3 = load i64* %x, !tbaa !4 + ret i64 %tmp3 +} + !0 = metadata !{metadata !"int", metadata !1} !1 = metadata !{metadata !"simple"} !3 = metadata !{metadata !"float", metadata !1} +!4 = metadata !{metadata !"long", metadata !1} +!5 = metadata !{metadata !"small", metadata !1} -- cgit v1.1