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annotate test/CodeGen/ARM/thumb1-varalloc.ll @ 95:afa8332a0e37

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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 60c9769439b8
children 1172e4bd9c6f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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1 ; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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2 ; RUN: llc < %s -mtriple=thumbv6-apple-darwin -regalloc=basic | FileCheck %s
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parents: 0
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3 ; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-apple-darwin
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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4 ; RUN: llvm-objdump -triple=thumbv6-apple-darwin -d %t | FileCheck %s
0
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5
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6 @__bar = external hidden global i8*
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 @__baz = external hidden global i8*
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8
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9 ; rdar://8819685
0
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10 define i8* @_foo() {
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11 entry:
83
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12 ; CHECK-LABEL: foo:
0
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13
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14 %size = alloca i32, align 4
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parents: 83
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15 %0 = load i8*, i8** @__bar, align 4
0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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16 %1 = icmp eq i8* %0, null
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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17 br i1 %1, label %bb1, label %bb3
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18 ; CHECK: bne
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19
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20 bb1:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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21 store i32 1026, i32* %size, align 4
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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22 %2 = alloca [1026 x i8], align 1
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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23 ; CHECK: mov [[R0:r[0-9]+]], sp
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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24 ; CHECK: adds {{r[0-9]+}}, [[R0]], {{r[0-9]+}}
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parents: 83
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25 %3 = getelementptr inbounds [1026 x i8], [1026 x i8]* %2, i32 0, i32 0
0
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26 %4 = call i32 @_called_func(i8* %3, i32* %size) nounwind
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27 %5 = icmp eq i32 %4, 0
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28 br i1 %5, label %bb2, label %bb3
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29
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30 bb2:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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31 %6 = call i8* @strdup(i8* %3) nounwind
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32 store i8* %6, i8** @__baz, align 4
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33 br label %bb3
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34
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35 bb3:
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36 %.0 = phi i8* [ %0, %entry ], [ %6, %bb2 ], [ %3, %bb1 ]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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37 ; CHECK: subs r4, #5
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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38 ; CHECK-NEXT: mov sp, r4
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39 ; CHECK-NEXT: pop {r4, r5, r6, r7, pc}
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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40 ret i8* %.0
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41 }
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42
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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43 declare noalias i8* @strdup(i8* nocapture) nounwind
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parents:
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44 declare i32 @_called_func(i8*, i32*) nounwind
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45
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46 ; Simple variable ending up *at* sp.
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47 define void @test_simple_var() {
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48 ; CHECK-LABEL: test_simple_var:
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49
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50 %addr32 = alloca i32
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51 %addr8 = bitcast i32* %addr32 to i8*
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52
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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53 ; CHECK: mov r0, sp
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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54 ; CHECK-NOT: adds r0
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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55 ; CHECK: blx
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parents: 0
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56 call void @take_ptr(i8* %addr8)
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57 ret void
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parents: 0
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58 }
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59
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60 ; Simple variable ending up at aligned offset from sp.
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parents: 0
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61 define void @test_local_var_addr_aligned() {
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62 ; CHECK-LABEL: test_local_var_addr_aligned:
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63
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64 %addr1.32 = alloca i32
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65 %addr1 = bitcast i32* %addr1.32 to i8*
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parents: 0
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66 %addr2.32 = alloca i32
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67 %addr2 = bitcast i32* %addr2.32 to i8*
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68
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69 ; CHECK: add r0, sp, #{{[0-9]+}}
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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70 ; CHECK: blx
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parents: 0
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71 call void @take_ptr(i8* %addr1)
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72
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73 ; CHECK: mov r0, sp
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parents: 0
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74 ; CHECK-NOT: add r0
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parents: 0
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75 ; CHECK: blx
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parents: 0
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76 call void @take_ptr(i8* %addr2)
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77
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78 ret void
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parents: 0
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79 }
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parents: 0
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80
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81 ; Simple variable ending up at aligned offset from sp.
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parents: 0
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82 define void @test_local_var_big_offset() {
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parents: 0
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83 ; CHECK-LABEL: test_local_var_big_offset:
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parents: 0
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84 %addr1.32 = alloca i32, i32 257
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parents: 0
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85 %addr1 = bitcast i32* %addr1.32 to i8*
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parents: 0
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86 %addr2.32 = alloca i32, i32 257
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parents: 0
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87
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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88 ; CHECK: add [[RTMP:r[0-9]+]], sp, #1020
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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89 ; CHECK: adds [[RTMP]], #8
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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90 ; CHECK: blx
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parents: 0
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91 call void @take_ptr(i8* %addr1)
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parents: 0
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92
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93 ret void
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parents: 0
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94 }
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parents: 0
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95
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parents: 0
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96 ; Max range addressable with tADDrSPi
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parents: 0
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97 define void @test_local_var_offset_1020() {
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parents: 0
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98 ; CHECK-LABEL: test_local_var_offset_1020
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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99 %addr1 = alloca i8, i32 4
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parents: 0
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100 %addr2 = alloca i8, i32 1020
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101
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102 ; CHECK: add r0, sp, #1020
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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103 ; CHECK-NEXT: blx
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104 call void @take_ptr(i8* %addr1)
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105
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106 ret void
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parents: 0
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107 }
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108
95
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109 ; Max range addressable with tADDrSPi + tADDi8 is 1275, however the automatic
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 83
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110 ; 4-byte aligning of objects on the stack combined with 8-byte stack alignment
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parents: 83
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111 ; means that 1268 is the max offset we can use.
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parents: 83
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112 define void @test_local_var_offset_1268() {
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parents: 83
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113 ; CHECK-LABEL: test_local_var_offset_1268
83
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parents: 0
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114 %addr1 = alloca i8, i32 1
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115 %addr2 = alloca i8, i32 1268
83
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116
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parents: 0
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117 ; CHECK: add r0, sp, #1020
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parents: 83
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118 ; CHECK: adds r0, #248
83
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Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 0
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119 ; CHECK-NEXT: blx
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120 call void @take_ptr(i8* %addr1)
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121
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122 ret void
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parents: 0
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123 }
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parents: 0
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124
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125 declare void @take_ptr(i8*)