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llvm-mirror/test/Regression/Transforms/InstCombine/2004-02-23-ShiftShiftOverflow.ll
2006-12-02 04:23:10 +00:00

16 lines
386 B
LLVM

; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep 34
int %test(int %X) {
; Do not fold into shr X, 34, as this uses undefined behavior!
%Y = shr int %X, ubyte 17
%Z = shr int %Y, ubyte 17
ret int %Z
}
int %test2(int %X) {
; Do not fold into shl X, 34, as this uses undefined behavior!
%Y = shl int %X, ubyte 17
%Z = shl int %Y, ubyte 17
ret int %Z
}