llvm-mirror/test/Transforms/InstCombine/2009-03-20-AShrOverShift.ll

; RUN: opt < %s -instcombine -S | grep {ashr i32 %val, 31}
; PR3851

define i32 @foo2(i32 %val) nounwind {
entry:
	%shr = ashr i32 %val, 15		; <i32> [#uses=3]
	%shr4 = ashr i32 %shr, 17		; <i32> [#uses=1]
        ret i32 %shr4
 }
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 20:01:28 +02:00			`; RUN: opt < %s -instcombine -S \| grep {ashr i32 %val, 31}`
Fix instcombine to not introduce undefined shifts when merging two shifts together. This fixes PR3851. llvm-svn: 67411 2009-03-20 23:41:15 +01:00			`; PR3851`

			`define i32 @foo2(i32 %val) nounwind {`
			`entry:`
			`%shr = ashr i32 %val, 15 ; <i32> [#uses=3]`
			`%shr4 = ashr i32 %shr, 17 ; <i32> [#uses=1]`
			`ret i32 %shr4`
			`}`