diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-01-30 00:39:15 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-30 00:39:15 +0000 |
| commit | b1534530c2be08779acc66382cee467b01e9097d (patch) | |
| tree | 89c7e5283190fb0beeb3936eb25ce75f40037a45 /test | |
| parent | 9a4c92c2b43e51ac531e0dbc319855635a14f905 (diff) | |
| download | external_llvm-b1534530c2be08779acc66382cee467b01e9097d.zip external_llvm-b1534530c2be08779acc66382cee467b01e9097d.tar.gz external_llvm-b1534530c2be08779acc66382cee467b01e9097d.tar.bz2 | |
Fix a bug where scalarrepl would discard offset if type would match.
In practice this can only happen on code with already undefined behavior,
but this is still a good thing to handle correctly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46539 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll b/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll new file mode 100644 index 0000000..0675a96 --- /dev/null +++ b/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll @@ -0,0 +1,21 @@ +; RUN: llvm-as < %s | opt -scalarrepl -instcombine | llvm-dis | grep {ret i8 17} +; rdar://5707076 +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin9.1.0" + %struct.T = type <{ i8, [3 x i8] }> + +define i8 @f() { +entry: + %s = alloca [1 x %struct.T], align 4 ; <[1 x %struct.T]*> [#uses=2] + %T3 = bitcast [1 x %struct.T]* %s to i32* + store i32 -61184, i32* %T3 + + %tmp16 = getelementptr [1 x %struct.T]* %s, i32 0, i32 0 ; <%struct.T*> [#uses=1] + %tmp17 = getelementptr %struct.T* %tmp16, i32 0, i32 1 ; <[3 x i8]*> [#uses=1] + %tmp1718 = bitcast [3 x i8]* %tmp17 to i32* ; <i32*> [#uses=1] + %tmp19 = load i32* %tmp1718, align 4 ; <i32> [#uses=1] + %mask = and i32 %tmp19, 16777215 ; <i32> [#uses=2] + %mask2324 = trunc i32 %mask to i8 ; <i8> [#uses=1] + ret i8 %mask2324 +} + |