llvm-6502/test/Transforms/GVN/2008-02-12UndefLoad.ll
Eli Friedman 261c704da1 Add test for PR1996. (This is my first time adding a test for a
transform, so please review.)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47050 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 06:55:57 +00:00

20 lines
750 B
LLVM

; 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(...)