test/CodeGen/Thumb2/t2sizereduction.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -run-pass=t2-reduce-size %s -o - | FileCheck %s

--- |
  target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
  target triple = "thumbv8m.main-arm-none-eabi"

  ; Function Attrs: norecurse nounwind readnone
  define i32 @test(i32 %x, i32 %y) local_unnamed_addr #0 {
  entry:
    %cmp6 = icmp sgt i32 %y, 0
    br i1 %cmp6, label %for.body.preheader, label %for.cond.cleanup

  for.body.preheader:                               ; preds = %entry
    br label %for.body

  for.cond.cleanup:                                 ; preds = %for.body, %entry
    %sum.0.lcssa = phi i32 [ 1, %entry ], [ %mul, %for.body ]
    ret i32 %sum.0.lcssa

  for.body:                                         ; preds = %for.body, %for.body.preheader
    %lsr.iv1 = phi i32 [ %lsr.iv.next2, %for.body ], [ %x, %for.body.preheader ]
    %lsr.iv = phi i32 [ %lsr.iv.next, %for.body ], [ %y, %for.body.preheader ]
    %sum.07 = phi i32 [ %mul, %for.body ], [ 1, %for.body.preheader ]
    %mul = mul nsw i32 %lsr.iv1, %sum.07
    %lsr.iv.next = add i32 %lsr.iv, -1
    %lsr.iv.next2 = add i32 %lsr.iv1, 1
    %exitcond = icmp eq i32 %lsr.iv.next, 0
    br i1 %exitcond, label %for.cond.cleanup, label %for.body
  }

  attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="cortex-m7" "target-features"="+d16,+dsp,+fp-armv8,+fp-only-sp,+hwdiv,+strict-align,+thumb-mode,-crc,-dotprod,-hwdiv-arm,-ras" "unsafe-fp-math"="false" "use-soft-float"="false" }

...
---
name:            test
tracksRegLiveness: true
liveins:
  - { reg: '$r0', virtual-reg: '' }
  - { reg: '$r1', virtual-reg: '' }
body:             |
  ; CHECK-LABEL: name: test
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
  ; CHECK:   liveins: $r0, $r1
  ; CHECK:   $r2 = tMOVr $r0, 14, $noreg
  ; CHECK:   $r0, dead $cpsr = tMOVi8 1, 14, $noreg
  ; CHECK:   tCMPi8 $r1, 1, 14, $noreg, implicit-def $cpsr
  ; CHECK:   t2Bcc %bb.2, 11, killed $cpsr
  ; CHECK: bb.1.for.body:
  ; CHECK:   successors: %bb.2(0x40000000), %bb.1(0x40000000)
  ; CHECK:   liveins: $r0, $r1, $r2
  ; CHECK:   $r0, dead $cpsr = tMUL $r2, killed $r0, 14, $noreg
  ; CHECK:   $r2, dead $cpsr = tADDi8 killed $r2, 1, 14, $noreg
  ; CHECK:   $r1, $cpsr = tSUBi8 killed $r1, 1, 14, $noreg
  ; CHECK:   t2Bcc %bb.1, 1, killed $cpsr
  ; CHECK: bb.2.for.cond.cleanup:
  ; CHECK:   liveins: $r0
  ; CHECK:   tBX_RET 14, $noreg, implicit $r0
  bb.0.entry:
    successors: %bb.1.for.body, %bb.2.for.cond.cleanup
    liveins: $r0, $r1

    $r2 = tMOVr $r0, 14, _
    $r0 = t2MOVi 1, 14, _, _
    t2CMPri $r1, 1, 14, _, implicit-def $cpsr
    t2Bcc %bb.2.for.cond.cleanup, 11, killed $cpsr

  bb.1.for.body:
    successors: %bb.2.for.cond.cleanup, %bb.1.for.body
    liveins: $r0, $r1, $r2

    $r0 = t2MUL $r2, killed $r0, 14, _
    $r2 = t2ADDri killed $r2, 1, 14, _, _
    $r1 = t2SUBri killed $r1, 1, 14, _, def $cpsr
    t2Bcc %bb.1.for.body, 1, killed $cpsr

  bb.2.for.cond.cleanup:
    liveins: $r0

    tBX_RET 14, _, implicit $r0

...