llvm-project/llvm/test/CodeGen/PowerPC/no-rlwimi-trivial-commute.mir

# RUN: llc -start-after=dead-mi-elimination -stop-after=twoaddressinstruction -o - %s | FileCheck %s

--- |
  target datalayout = "E-m:e-i64:64-n32:64"
  target triple = "powerpc64-unknown-linux-gnu"
  
  @d = global i32 15, align 4
  @b = global i32* @d, align 8
  @a = common global i32 0, align 4
  
  ; Function Attrs: nounwind
  define signext i32 @main() #0 {
  entry:
    %0 = load i32*, i32** @b, align 8
    %1 = load i32, i32* @a, align 4
    %lnot = icmp eq i32 %1, 0
    %lnot.ext = zext i1 %lnot to i32
    %shr.i = lshr i32 2072, %lnot.ext
    %call.lobit = lshr i32 %shr.i, 7
    %2 = and i32 %call.lobit, 1
    %3 = load i32, i32* %0, align 4
    %or = or i32 %2, %3
    store i32 %or, i32* %0, align 4
    %4 = load i32, i32* @a, align 4
    %lnot.1 = icmp eq i32 %4, 0
    %lnot.ext.1 = zext i1 %lnot.1 to i32
    %shr.i.1 = lshr i32 2072, %lnot.ext.1
    %call.lobit.1 = lshr i32 %shr.i.1, 7
    %5 = and i32 %call.lobit.1, 1
    %or.1 = or i32 %5, %or
    store i32 %or.1, i32* %0, align 4
    ret i32 %or.1
  }
  
  attributes #0 = { nounwind "target-cpu"="ppc64" }

...
---
name:            main
alignment:       2
exposesReturnsTwice: false
tracksRegLiveness: true
registers:       
  - { id: 0, class: g8rc_and_g8rc_nox0 }
  - { id: 1, class: g8rc_and_g8rc_nox0 }
  - { id: 2, class: gprc }
  - { id: 3, class: gprc }
  - { id: 4, class: gprc }
  - { id: 5, class: g8rc_and_g8rc_nox0 }
  - { id: 6, class: g8rc_and_g8rc_nox0 }
  - { id: 7, class: gprc }
  - { id: 8, class: gprc }
  - { id: 9, class: gprc }
  - { id: 10, class: g8rc }
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    0
  adjustsStack:    false
  hasCalls:        false
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
body:             |
  bb.0.entry:
    liveins: %x2

    %0 = ADDIStocHA %x2, @b
    %1 = LD target-flags(ppc-toc-lo) @b, killed %0 :: (load 8 from @b)
    %2 = LWZ 0, %1 :: (load 4 from %ir.0)
    %3 = LI 0
    %4 = RLWIMI %3, killed %2, 0, 0, 31
    ; CHECK-LABEL: name: main
    ; CHECK: %[[REG1:[0-9]+]] = LI 0
    ; CHECK: %[[REG2:[0-9]+]] = COPY %[[REG1]]
    ; CHECK: %[[REG2]] = RLWIMI %[[REG2]], killed %2, 0, 0, 31
    %8 = RLWIMI %3, %4, 0, 0, 31
    STW %4, 0, %1 :: (store 4 into %ir.0)
    %10 = EXTSW_32_64 %8
    STW %8, 0, %1 :: (store 4 into %ir.0)
    %x3 = COPY %10
    BLR8 implicit %x3, implicit %lr8, implicit %rm

...