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view test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 95c75e76d11b
children
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line source

; RUN: opt < %s -instcombine -S | FileCheck %s

; This cannot be turned into a sign extending cast!

define i64 @test(i64 %X) {
        %Y = shl i64 %X, 16             ; <i64> [#uses=1]
; CHECK: %Y = shl i64 %X, 16
        %Z = ashr i64 %Y, 16            ; <i64> [#uses=1]
; CHECK: %Z = ashr exact i64 %Y, 16
        ret i64 %Z
; CHECK: ret i64 %Z
}