diff options
Diffstat (limited to 'test/Analysis/TypeBasedAliasAnalysis/precedence.ll')
| -rw-r--r-- | test/Analysis/TypeBasedAliasAnalysis/precedence.ll | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/test/Analysis/TypeBasedAliasAnalysis/precedence.ll b/test/Analysis/TypeBasedAliasAnalysis/precedence.ll index 9fa859eaab..ade39f7c8e 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} |