File: mul-shift-reassoc.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-- | FileCheck %s
; RUN: llc < %s -mtriple=i686-- -early-live-intervals -verify-machineinstrs | FileCheck %s

define i32 @test(i32 %X, i32 %Y) {
	; Push the shl through the mul to allow an LEA to be formed, instead
        ; of using a shift and add separately.
; CHECK-LABEL: test:
; CHECK:       # %bb.0:
; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; CHECK-NEXT:    imull %eax, %ecx
; CHECK-NEXT:    leal (%eax,%ecx,2), %eax
; CHECK-NEXT:    retl
        %tmp.2 = shl i32 %X, 1          ; <i32> [#uses=1]
        %tmp.3 = mul i32 %tmp.2, %Y             ; <i32> [#uses=1]
        %tmp.5 = add i32 %tmp.3, %Y             ; <i32> [#uses=1]
        ret i32 %tmp.5
}