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llvm-mirror/test/Transforms/GVN/2008-02-12-UndefLoad.ll
Eric Christopher a62270de2c Revert "Temporarily Revert "Add basic loop fusion pass.""
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
2019-04-17 04:52:47 +00:00

22 lines
781 B
LLVM

; RUN: opt < %s -gvn -S | FileCheck %s
; PR1996
%struct.anon = type { i32, i8, i8, i8, i8 }
define i32 @a() {
entry:
%c = alloca %struct.anon ; <%struct.anon*> [#uses=2]
%tmp = getelementptr %struct.anon, %struct.anon* %c, i32 0, i32 0 ; <i32*> [#uses=1]
%tmp1 = getelementptr i32, i32* %tmp, i32 1 ; <i32*> [#uses=2]
%tmp2 = load i32, i32* %tmp1, align 4 ; <i32> [#uses=1]
; CHECK-NOT: load
%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(...)