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annotate test/CodeGen/Generic/select.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 54457678186b
children
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s
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2
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3 %Domain = type { i8*, i32, i32*, i32, i32, i32*, %Domain* }
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4 @AConst = constant i32 123 ; <i32*> [#uses=1]
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5
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6 ; Test setting values of different constants in registers.
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7 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 define void @testConsts(i32 %N, float %X) {
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9 %a = add i32 %N, 1 ; <i32> [#uses=0]
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10 %i = add i32 %N, 12345678 ; <i32> [#uses=0]
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11 %b = add i16 4, 3 ; <i16> [#uses=0]
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12 %c = fadd float %X, 0.000000e+00 ; <float> [#uses=0]
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13 %d = fadd float %X, 0x400921CAC0000000 ; <float> [#uses=0]
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14 %f = add i32 -1, 10 ; <i32> [#uses=0]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 %g = add i16 20, -1 ; <i16> [#uses=0]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 %j = add i16 -1, 30 ; <i16> [#uses=0]
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17 %h = add i8 40, -1 ; <i8> [#uses=0]
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18 %k = add i8 -1, 50 ; <i8> [#uses=0]
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19 ret void
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20 }
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21
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22 ; A SetCC whose result is used should produce instructions to
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23 ; compute the boolean value in a register. One whose result
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24 ; is unused will only generate the condition code but not
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25 ; the boolean result.
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26 ;
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27 define void @unusedBool(i32* %x, i32* %y) {
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28 icmp eq i32* %x, %y ; <i1>:1 [#uses=1]
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29 xor i1 %1, true ; <i1>:2 [#uses=0]
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30 icmp ne i32* %x, %y ; <i1>:3 [#uses=0]
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31 ret void
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32 }
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33
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34 ; A constant argument to a Phi produces a Cast instruction in the
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35 ; corresponding predecessor basic block. This checks a few things:
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36 ; -- phi arguments coming from the bottom of the same basic block
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37 ; (they should not be forward substituted in the machine code!)
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38 ; -- code generation for casts of various types
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39 ; -- use of immediate fields for integral constants of different sizes
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40 ; -- branch on a constant condition
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41 ;
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42 define void @mergeConstants(i32* %x, i32* %y) {
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43 ; <label>:0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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44 br label %Top
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45
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46 Top: ; preds = %Next, %Top, %0
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47 phi i32 [ 0, %0 ], [ 1, %Top ], [ 524288, %Next ] ; <i32>:1 [#uses=0]
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48 phi float [ 0.000000e+00, %0 ], [ 1.000000e+00, %Top ], [ 2.000000e+00, %Next ] ; <float>:2 [#uses=0]
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49 phi double [ 5.000000e-01, %0 ], [ 1.500000e+00, %Top ], [ 2.500000e+00, %Next ]
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50 phi i1 [ true, %0 ], [ false, %Top ], [ true, %Next ] ; <i1>:4 [#uses=0]
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51 br i1 true, label %Top, label %Next
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52
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53 Next: ; preds = %Top
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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54 br label %Top
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55 }
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56
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57
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58
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59 ; A constant argument to a cast used only once should be forward substituted
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60 ; and loaded where needed, which happens is:
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61 ; -- User of cast has no immediate field
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62 ; -- User of cast has immediate field but constant is too large to fit
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63 ; or constant is not resolved until later (e.g., global address)
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64 ; -- User of cast uses it as a call arg. or return value so it is an implicit
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65 ; use but has to be loaded into a virtual register so that the reg.
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66 ; allocator can allocate the appropriate phys. reg. for it
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67 ;
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68 define i32* @castconst(float) {
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69 %castbig = trunc i64 99999999 to i32 ; <i32> [#uses=1]
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70 %castsmall = trunc i64 1 to i32 ; <i32> [#uses=1]
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71 %usebig = add i32 %castbig, %castsmall ; <i32> [#uses=0]
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72 %castglob = bitcast i32* @AConst to i64* ; <i64*> [#uses=1]
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73 %dummyl = load i64, i64* %castglob ; <i64> [#uses=0]
0
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74 %castnull = inttoptr i64 0 to i32* ; <i32*> [#uses=1]
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75 ret i32* %castnull
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76 }
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77
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78 ; Test branch-on-comparison-with-zero, in two ways:
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79 ; 1. can be folded
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80 ; 2. cannot be folded because result of comparison is used twice
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81 ;
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82 define void @testbool(i32 %A, i32 %B) {
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83 br label %Top
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84
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85 Top: ; preds = %loop, %0
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86 %D = add i32 %A, %B ; <i32> [#uses=2]
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87 %E = sub i32 %D, -4 ; <i32> [#uses=1]
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88 %C = icmp sle i32 %E, 0 ; <i1> [#uses=1]
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89 br i1 %C, label %retlbl, label %loop
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90
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91 loop: ; preds = %loop, %Top
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92 %F = add i32 %A, %B ; <i32> [#uses=0]
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93 %G = sub i32 %D, -4 ; <i32> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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94 %D.upgrd.1 = icmp sle i32 %G, 0 ; <i1> [#uses=1]
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95 %E.upgrd.2 = xor i1 %D.upgrd.1, true ; <i1> [#uses=1]
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96 br i1 %E.upgrd.2, label %loop, label %Top
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97
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98 retlbl: ; preds = %Top
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99 ret void
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100 }
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101
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102
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103 ;; Test use of a boolean result in cast operations.
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104 ;; Requires converting a condition code result into a 0/1 value in a reg.
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105 ;;
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106 define i32 @castbool(i32 %A, i32 %B) {
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107 bb0:
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108 %cond213 = icmp slt i32 %A, %B ; <i1> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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109 %cast110 = zext i1 %cond213 to i8 ; <i8> [#uses=1]
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110 %cast109 = zext i8 %cast110 to i32 ; <i32> [#uses=1]
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111 ret i32 %cast109
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parents:
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112 }
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113
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114 ;; Test use of a boolean result in arithmetic and logical operations.
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parents:
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115 ;; Requires converting a condition code result into a 0/1 value in a reg.
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parents:
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116 ;;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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117 define i1 @boolexpr(i1 %b, i32 %N) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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118 %b2 = icmp sge i32 %N, 0 ; <i1> [#uses=1]
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parents:
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119 %b3 = and i1 %b, %b2 ; <i1> [#uses=1]
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120 ret i1 %b3
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parents:
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121 }
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parents:
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122
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
123 ; Test branch on floating point comparison
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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124 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 define void @testfloatbool(float %x, float %y) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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126 br label %Top
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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127
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parents:
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128 Top: ; preds = %Top, %0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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129 %p = fadd float %x, %y ; <float> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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130 %z = fsub float %x, %y ; <float> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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131 %b = fcmp ole float %p, %z ; <i1> [#uses=2]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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132 %c = xor i1 %b, true ; <i1> [#uses=0]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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133 br i1 %b, label %Top, label %goon
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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135 goon: ; preds = %Top
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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136 ret void
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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137 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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140 ; Test cases where an LLVM instruction requires no machine
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 ; instructions (e.g., cast int* to long). But there are 2 cases:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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142 ; 1. If the result register has only a single use and the use is in the
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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143 ; same basic block, the operand will be copy-propagated during
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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144 ; instruction selection.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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145 ; 2. If the result register has multiple uses or is in a different
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 ; basic block, it cannot (or will not) be copy propagated during
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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147 ; instruction selection. It will generate a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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148 ; copy instruction (add-with-0), but this copy should get coalesced
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 ; away by the register allocator.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 define i32 @checkForward(i32 %N, i32* %A) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 bb2:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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153 %reg114 = shl i32 %N, 2 ; <i32> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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154 %cast115 = sext i32 %reg114 to i64 ; <i64> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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155 %cast116 = ptrtoint i32* %A to i64 ; <i64> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 %reg116 = add i64 %cast116, %cast115 ; <i64> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 %castPtr = inttoptr i64 %reg116 to i32* ; <i32*> [#uses=1]
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
158 %reg118 = load i32, i32* %castPtr ; <i32> [#uses=1]
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 %cast117 = sext i32 %reg118 to i64 ; <i64> [#uses=2]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 %reg159 = add i64 1234567, %cast117 ; <i64> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 %reg160 = add i64 7654321, %cast117 ; <i64> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 ret i32 0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 ; Test case for unary NOT operation constructed from XOR.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 ;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 define void @checkNot(i1 %b, i32 %i) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 %notB = xor i1 %b, true ; <i1> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 %notI = xor i32 %i, -1 ; <i32> [#uses=2]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 %F = icmp sge i32 %notI, 100 ; <i1> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 %J = add i32 %i, %i ; <i32> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 %andNotB = and i1 %F, %notB ; <i1> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 %andNotI = and i32 %J, %notI ; <i32> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 %notB2 = xor i1 true, %b ; <i1> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 %notI2 = xor i32 -1, %i ; <i32> [#uses=0]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 ret void
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 ; Test case for folding getelementptr into a load/store
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 ;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 define i32 @checkFoldGEP(%Domain* %D, i64 %idx) {
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
183 %reg841 = getelementptr %Domain, %Domain* %D, i64 0, i32 1 ; <i32*> [#uses=1]
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
184 %reg820 = load i32, i32* %reg841 ; <i32> [#uses=1]
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 ret i32 %reg820
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 ; Test case for scalarising a 1 element vselect
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 ;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 define <1 x i32> @checkScalariseVSELECT(<1 x i32> %a, <1 x i32> %b) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 %cond = icmp uge <1 x i32> %a, %b
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 %s = select <1 x i1> %cond, <1 x i32> %a, <1 x i32> %b
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 ret <1 x i32> %s
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 }