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annotate test/CodeGen/ARM/sub-cmp-peephole.ll @ 0:95c75e76d11b

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children e4204d083e25
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 ; RUN: llc < %s -mtriple=arm-apple-darwin | FileCheck %s
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
2
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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3 define i32 @f(i32 %a, i32 %b) nounwind ssp {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
4 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
5 ; CHECK-LABEL: f:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
6 ; CHECK: subs
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
7 ; CHECK-NOT: cmp
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
8 %cmp = icmp sgt i32 %a, %b
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
9 %sub = sub nsw i32 %a, %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
10 %sub. = select i1 %cmp, i32 %sub, i32 0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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11 ret i32 %sub.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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12 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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13
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
14 define i32 @g(i32 %a, i32 %b) nounwind ssp {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
15 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
16 ; CHECK-LABEL: g:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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17 ; CHECK: subs
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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18 ; CHECK-NOT: cmp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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19 %cmp = icmp slt i32 %a, %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
20 %sub = sub nsw i32 %b, %a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
21 %sub. = select i1 %cmp, i32 %sub, i32 0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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22 ret i32 %sub.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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23 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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24
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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25 define i32 @h(i32 %a, i32 %b) nounwind ssp {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
26 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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27 ; CHECK-LABEL: h:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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28 ; CHECK: subs
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
29 ; CHECK-NOT: cmp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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30 %cmp = icmp sgt i32 %a, 3
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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31 %sub = sub nsw i32 %a, 3
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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32 %sub. = select i1 %cmp, i32 %sub, i32 %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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33 ret i32 %sub.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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34 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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35
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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36 ; rdar://11725965
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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37 define i32 @i(i32 %a, i32 %b) nounwind readnone ssp {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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38 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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39 ; CHECK-LABEL: i:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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40 ; CHECK: subs
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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41 ; CHECK-NOT: cmp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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42 %cmp = icmp ult i32 %a, %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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43 %sub = sub i32 %b, %a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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44 %sub. = select i1 %cmp, i32 %sub, i32 0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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45 ret i32 %sub.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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46 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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47 ; If CPSR is live-out, we can't remove cmp if there exists
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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48 ; a swapped sub.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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49 define i32 @j(i32 %a, i32 %b) nounwind {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
50 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
51 ; CHECK-LABEL: j:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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52 ; CHECK: sub
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
53 ; CHECK: cmp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
54 %cmp = icmp eq i32 %b, %a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
55 %sub = sub nsw i32 %a, %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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56 br i1 %cmp, label %if.then, label %if.else
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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57
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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58 if.then:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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59 %cmp2 = icmp sgt i32 %b, %a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
60 %sel = select i1 %cmp2, i32 %sub, i32 %a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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61 ret i32 %sel
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
62
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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63 if.else:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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64 ret i32 %sub
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
65 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
66
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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67 ; If the sub/rsb instruction is predicated, we can't use the flags.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
68 ; <rdar://problem/12263428>
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
69 ; Test case from MultiSource/Benchmarks/Ptrdist/bc/number.s
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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70 ; CHECK: bc_raise
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
71 ; CHECK: rsbeq
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
72 ; CHECK: cmp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
73 define i32 @bc_raise() nounwind ssp {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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74 entry:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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75 %val.2.i = select i1 undef, i32 0, i32 undef
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
76 %sub.i = sub nsw i32 0, %val.2.i
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
77 %retval.0.i = select i1 undef, i32 %val.2.i, i32 %sub.i
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
78 %cmp1 = icmp eq i32 %retval.0.i, 0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
79 br i1 %cmp1, label %land.lhs.true, label %if.end11
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
80
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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81 land.lhs.true: ; preds = %num2long.exit
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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82 ret i32 17
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
83
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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84 if.end11: ; preds = %num2long.exit
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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85 ret i32 23
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
86 }