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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-10-23 17:28:19 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-10-23 17:28:19 +0000 |
| commit | 8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd (patch) | |
| tree | aa761eb31c1f7c14a3c9e313f4a1d29ea06e066b /test/Analysis | |
| parent | f39fe46062d2093fc3d7c092bc8c4561b744164c (diff) | |
| download | external_llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.zip external_llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.tar.gz external_llvm-8e3851a6eb9fe5fc30094c3a00d2b89c7cd68cbd.tar.bz2 | |
Use address-taken to disambiguate global variable and indirect memops.
Major steps include:
1). introduces a not-addr-taken bit-field in GlobalVariable
2). GlobalOpt pass sets "not-address-taken" if it proves a global varirable
dosen't have its address taken.
3). AA use this info for disambiguation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193251 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Analysis')
| -rw-r--r-- | test/Analysis/BasicAA/noaddrtaken.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/noaddrtaken.ll b/test/Analysis/BasicAA/noaddrtaken.ll new file mode 100644 index 0000000..14aa45b --- /dev/null +++ b/test/Analysis/BasicAA/noaddrtaken.ll @@ -0,0 +1,29 @@ +; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s + +; ModuleID = 'b.c' +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +; CHECK: NoAlias: i32* %p, i32* @xyz + +;@xyz = global i32 12, align 4 +@xyz = internal unnamed_addr global notaddrtaken i32 12, align 4 + +; Function Attrs: nounwind ssp uwtable +define i32 @foo(i32* nocapture %p, i32* nocapture %q) #0 { +entry: + %0 = load i32* @xyz, align 4, !tbaa !0 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* @xyz, align 4, !tbaa !0 + store i32 1, i32* %p, align 4, !tbaa !0 + %1 = load i32* @xyz, align 4, !tbaa !0 + store i32 %1, i32* %q, align 4, !tbaa !0 + ret i32 undef +} + +attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } + +!0 = metadata !{metadata !1, metadata !1, i64 0} +!1 = metadata !{metadata !"int", metadata !2, i64 0} +!2 = metadata !{metadata !"omnipotent char", metadata !3, i64 0} +!3 = metadata !{metadata !"Simple C/C++ TBAA"} |