view test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll @ 33:e4204d083e25

LLVM 3.5
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 14:32:10 +0900
parents 95c75e76d11b
children afa8332a0e37
line wrap: on
line source

; RUN: llc < %s -march=x86 -mcpu=generic | \
; RUN:   grep shld | count 1
;
; Check that the isel does not fold the shld, which already folds a load
; and has two uses, into a store.

@A = external global i32                ; <i32*> [#uses=2]

define i32 @test5(i32 %B, i8 %C) {
        %tmp.1 = load i32* @A           ; <i32> [#uses=1]
        %shift.upgrd.1 = zext i8 %C to i32              ; <i32> [#uses=1]
        %tmp.2 = shl i32 %tmp.1, %shift.upgrd.1         ; <i32> [#uses=1]
        %tmp.3 = sub i8 32, %C          ; <i8> [#uses=1]
        %shift.upgrd.2 = zext i8 %tmp.3 to i32          ; <i32> [#uses=1]
        %tmp.4 = lshr i32 %B, %shift.upgrd.2            ; <i32> [#uses=1]
        %tmp.5 = or i32 %tmp.4, %tmp.2          ; <i32> [#uses=2]
        store i32 %tmp.5, i32* @A
        ret i32 %tmp.5
}