1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2# RUN: llc -run-pass=thumb2-reduce-size %s -o - | FileCheck %s
3
4--- |
5  target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
6  target triple = "thumbv8m.main-arm-none-eabi"
7
8  ; Function Attrs: norecurse nounwind readnone
9  define i32 @test(i32 %x, i32 %y) local_unnamed_addr #0 {
10  entry:
11    %cmp6 = icmp sgt i32 %y, 0
12    br i1 %cmp6, label %for.body.preheader, label %for.cond.cleanup
13
14  for.body.preheader:                               ; preds = %entry
15    br label %for.body
16
17  for.cond.cleanup:                                 ; preds = %for.body, %entry
18    %sum.0.lcssa = phi i32 [ 1, %entry ], [ %mul, %for.body ]
19    ret i32 %sum.0.lcssa
20
21  for.body:                                         ; preds = %for.body, %for.body.preheader
22    %lsr.iv1 = phi i32 [ %lsr.iv.next2, %for.body ], [ %x, %for.body.preheader ]
23    %lsr.iv = phi i32 [ %lsr.iv.next, %for.body ], [ %y, %for.body.preheader ]
24    %sum.07 = phi i32 [ %mul, %for.body ], [ 1, %for.body.preheader ]
25    %mul = mul nsw i32 %lsr.iv1, %sum.07
26    %lsr.iv.next = add i32 %lsr.iv, -1
27    %lsr.iv.next2 = add i32 %lsr.iv1, 1
28    %exitcond = icmp eq i32 %lsr.iv.next, 0
29    br i1 %exitcond, label %for.cond.cleanup, label %for.body
30  }
31
32  attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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"="-d32,+dsp,+fp-armv8,-fp64,+hwdiv,+strict-align,+thumb-mode,-crc,-dotprod,-hwdiv-arm,-ras" "unsafe-fp-math"="false" "use-soft-float"="false" }
33
34...
35---
36name:            test
37tracksRegLiveness: true
38liveins:
39  - { reg: '$r0', virtual-reg: '' }
40  - { reg: '$r1', virtual-reg: '' }
41body:             |
42  ; CHECK-LABEL: name: test
43  ; CHECK: bb.0.entry:
44  ; CHECK:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
45  ; CHECK:   liveins: $r0, $r1
46  ; CHECK:   $r2 = tMOVr $r0, 14 /* CC::al */, $noreg
47  ; CHECK:   $r0, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
48  ; CHECK:   tCMPi8 $r1, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
49  ; CHECK:   t2Bcc %bb.2, 11 /* CC::lt */, killed $cpsr
50  ; CHECK: bb.1.for.body:
51  ; CHECK:   successors: %bb.2(0x40000000), %bb.1(0x40000000)
52  ; CHECK:   liveins: $r0, $r1, $r2
53  ; CHECK:   $r0, dead $cpsr = tMUL $r2, killed $r0, 14 /* CC::al */, $noreg
54  ; CHECK:   $r2, dead $cpsr = tADDi8 killed $r2, 1, 14 /* CC::al */, $noreg
55  ; CHECK:   $r1, $cpsr = tSUBi8 killed $r1, 1, 14 /* CC::al */, $noreg
56  ; CHECK:   t2Bcc %bb.1, 1 /* CC::ne */, killed $cpsr
57  ; CHECK: bb.2.for.cond.cleanup:
58  ; CHECK:   liveins: $r0
59  ; CHECK:   tBX_RET 14 /* CC::al */, $noreg, implicit $r0
60  bb.0.entry:
61    successors: %bb.1.for.body, %bb.2.for.cond.cleanup
62    liveins: $r0, $r1
63
64    $r2 = tMOVr $r0, 14, _
65    $r0 = t2MOVi 1, 14, _, _
66    t2CMPri $r1, 1, 14, _, implicit-def $cpsr
67    t2Bcc %bb.2.for.cond.cleanup, 11, killed $cpsr
68
69  bb.1.for.body:
70    successors: %bb.2.for.cond.cleanup, %bb.1.for.body
71    liveins: $r0, $r1, $r2
72
73    $r0 = t2MUL $r2, killed $r0, 14, _
74    $r2 = t2ADDri killed $r2, 1, 14, _, _
75    $r1 = t2SUBri killed $r1, 1, 14, _, def $cpsr
76    t2Bcc %bb.1.for.body, 1, killed $cpsr
77
78  bb.2.for.cond.cleanup:
79    liveins: $r0
80
81    tBX_RET 14, _, implicit $r0
82
83...
84