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llvm-mirror/test/Transforms/InstCombine/2004-02-23-ShiftShiftOverflow.ll
Dan Gohman 205b641954 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
2009-09-11 18:01:28 +00:00

16 lines
519 B
LLVM

; RUN: opt < %s -instcombine -S | not grep 34
define i32 @test(i32 %X) {
; Do not fold into shr X, 34, as this uses undefined behavior!
%Y = ashr i32 %X, 17 ; <i32> [#uses=1]
%Z = ashr i32 %Y, 17 ; <i32> [#uses=1]
ret i32 %Z
}
define i32 @test2(i32 %X) {
; Do not fold into shl X, 34, as this uses undefined behavior!
%Y = shl i32 %X, 17 ; <i32> [#uses=1]
%Z = shl i32 %Y, 17 ; <i32> [#uses=1]
ret i32 %Z
}