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| author | Eli Friedman <eli.friedman@gmail.com> | 2012-02-27 20:46:07 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2012-02-27 20:46:07 +0000 |
| commit | 1680a24e534f3066f99fa6b8a618e71373e2920c (patch) | |
| tree | 54e6a31e1ecefc7047b50ebea1b5d652eb3a2b9c /test/Analysis | |
| parent | 9e2a79c2878afb4fd20a6ab05952b5f71cf580e9 (diff) | |
| download | llvm-1680a24e534f3066f99fa6b8a618e71373e2920c.tar.gz llvm-1680a24e534f3066f99fa6b8a618e71373e2920c.tar.bz2 llvm-1680a24e534f3066f99fa6b8a618e71373e2920c.tar.xz | |
Teach BasicAA about the LLVM IR rules that allow reading past the end of an object given sufficient alignment. Fixes PR12098.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151553 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Analysis')
| -rw-r--r-- | test/Analysis/BasicAA/aligned-overread.ll | 25 | ||||
| -rw-r--r-- | test/Analysis/BasicAA/global-size.ll | 2 |
2 files changed, 26 insertions, 1 deletions
diff --git a/test/Analysis/BasicAA/aligned-overread.ll b/test/Analysis/BasicAA/aligned-overread.ll new file mode 100644 index 0000000000..b05f8eb694 --- /dev/null +++ b/test/Analysis/BasicAA/aligned-overread.ll @@ -0,0 +1,25 @@ +; RUN: opt < %s -basicaa -dse -S | FileCheck %s + +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" + +%struct.S0 = type <{ i8, [4 x i8] }> + +@a = global { i8, i8, i8, i8, i8 } { i8 undef, i8 0, i8 0, i8 0, i8 0 }, align 8 + +define i32 @main() nounwind uwtable ssp { +entry: + %tmp = load i8* getelementptr inbounds ({ i8, i8, i8, i8, i8 }* @a, i64 0, i32 4), align 4 + %tmp1 = or i8 %tmp, -128 + store i8 %tmp1, i8* getelementptr inbounds ({ i8, i8, i8, i8, i8 }* @a, i64 0, i32 4), align 4 + %tmp2 = load i64* bitcast ({ i8, i8, i8, i8, i8 }* @a to i64*), align 8 + store i8 11, i8* getelementptr inbounds ({ i8, i8, i8, i8, i8 }* @a, i64 0, i32 4), align 4 + %tmp3 = trunc i64 %tmp2 to i32 + ret i32 %tmp3 + +; Make sure we don't delete either store here +; CHECK: @main +; CHECK: store i8 %tmp1 +; CHECK: store i8 11 +} + diff --git a/test/Analysis/BasicAA/global-size.ll b/test/Analysis/BasicAA/global-size.ll index a7e5aab6c1..617f4c3d9d 100644 --- a/test/Analysis/BasicAA/global-size.ll +++ b/test/Analysis/BasicAA/global-size.ll @@ -4,7 +4,7 @@ ; RUN: opt < %s -basicaa -gvn -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" -@B = global i16 8 +@B = global i16 8, align 2 ; CHECK: @test1 define i16 @test1(i32* %P) { |