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Add test for PR1996. (This is my first time adding a test for a 

transform, so please review.)

llvm-svn: 47050
This commit is contained in:
Eli Friedman 2008-02-13 06:55:57 +00:00
parent fe61967361
commit 03ec63f29d
1 changed files with 19 additions and 0 deletions
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19
llvm/test/Transforms/GVN/2008-02-12UndefLoad.ll Normal file
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; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep load
%struct.anon = type { i32, i8, i8, i8, i8 }
define i32 @a() {
entry:
%c = alloca %struct.anon ; <%struct.anon*> [#uses=2]
%tmp = getelementptr %struct.anon* %c, i32 0, i32 0 ; <i32*> [#uses=1]
%tmp1 = getelementptr i32* %tmp, i32 1 ; <i32*> [#uses=2]
%tmp2 = load i32* %tmp1, align 4 ; <i32> [#uses=1]
%tmp3 = or i32 %tmp2, 11 ; <i32> [#uses=1]
%tmp4 = and i32 %tmp3, -21 ; <i32> [#uses=1]
store i32 %tmp4, i32* %tmp1, align 4
%call = call i32 (...)* @x( %struct.anon* %c ) ; <i32> [#uses=0]
ret i32 undef
}
declare i32 @x(...)