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annotate test/CodeGen/Thumb/large-stack.ll @ 128:c347d3398279 default tip

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fix
author mir3636
date Wed, 06 Dec 2017 14:37:17 +0900
parents 803732b1fca8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
120
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1 ; RUN: llc < %s -mtriple=thumb-apple-ios | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN4
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2 ; RUN: llc < %s -mtriple=thumb-none-eabi | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN8
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3 ; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-apple-ios
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4 ; RUN: llvm-objdump -triple=thumbv6-apple-ios -d %t | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN4
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5 ; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-none-eabi
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6 ; RUN: llvm-objdump -triple=thumbv6-none-eabi -d %t | FileCheck %s --check-prefix=CHECK --check-prefix=ALIGN8
0
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7
83
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8 ; Largest stack for which a single tADDspi/tSUBspi is enough
0
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9 define void @test1() {
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10 ; CHECK-LABEL: test1:
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11 ; CHECK: sub sp, #508
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12 ; CHECK: add sp, #508
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13 %tmp = alloca [ 508 x i8 ] , align 4
0
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14 ret void
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15 }
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16
83
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17 ; Largest stack for which three tADDspi/tSUBspis are enough
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18 define void @test100() {
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19 ; CHECK-LABEL: test100:
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20 ; CHECK: sub sp, #508
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21 ; CHECK: sub sp, #508
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22 ; CHECK: sub sp, #508
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23 ; CHECK: add sp, #508
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24 ; CHECK: add sp, #508
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25 ; CHECK: add sp, #508
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26 %tmp = alloca [ 1524 x i8 ] , align 4
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27 ret void
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28 }
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29
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30 ; Largest stack for which three tADDspi/tSUBspis are enough
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31 define void @test100_nofpelim() "no-frame-pointer-elim"="true" {
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32 ; CHECK-LABEL: test100_nofpelim:
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33 ; CHECK: sub sp, #508
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34 ; CHECK: sub sp, #508
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35 ; CHECK: sub sp, #508
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36 ; ALIGN4: subs r4, r7, #4
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37 ; ALIGN8: subs r4, r7, #7
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38 ; ALIGN8: subs r4, #1
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39 ; CHECK: mov sp, r4
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40 %tmp = alloca [ 1524 x i8 ] , align 4
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41 ret void
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42 }
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43
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44 ; Smallest stack for which we use a constant pool
0
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45 define void @test2() {
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46 ; CHECK-LABEL: test2:
100
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47 ; CHECK: ldr [[TEMP:r[0-7]]],
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48 ; CHECK: add sp, [[TEMP]]
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49 ; CHECK: ldr [[TEMP:r[0-7]]],
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50 ; CHECK: add sp, [[TEMP]]
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51 %tmp = alloca [ 1528 x i8 ] , align 4
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52 ret void
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53 }
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54
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55 ; Smallest stack for which we use a constant pool
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56 define void @test2_nofpelim() "no-frame-pointer-elim"="true" {
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57 ; CHECK-LABEL: test2_nofpelim:
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58 ; CHECK: ldr [[TEMP:r[0-7]]],
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59 ; CHECK: add sp, [[TEMP]]
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60 ; ALIGN4: subs r4, r7, #4
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61 ; ALIGN8: subs r4, r7, #7
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62 ; ALIGN8: subs r4, #1
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63 ; CHECK: mov sp, r4
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64 %tmp = alloca [ 1528 x i8 ] , align 4
0
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65 ret void
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66 }
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67
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68 define i32 @test3() {
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69 ; CHECK-LABEL: test3:
100
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70 ; CHECK: ldr [[TEMP:r[0-7]]],
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71 ; CHECK: add sp, [[TEMP]]
121
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72 ; CHECK: ldr [[TEMP2:r[0-7]]],
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73 ; CHECK: add [[TEMP2]], sp
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74 ; CHECK: ldr [[TEMP3:r[0-7]]],
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75 ; CHECK: add sp, [[TEMP3]]
120
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76 %retval = alloca i32, align 4
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77 %tmp = alloca i32, align 4
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78 %a = alloca [805306369 x i8], align 4
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79 store i32 0, i32* %tmp
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80 %tmp1 = load i32, i32* %tmp
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81 ret i32 %tmp1
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82 }
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83
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84 define i32 @test3_nofpelim() "no-frame-pointer-elim"="true" {
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85 ; CHECK-LABEL: test3_nofpelim:
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86 ; CHECK: ldr [[TEMP:r[0-7]]],
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87 ; CHECK: add sp, [[TEMP]]
121
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88 ; CHECK: ldr [[TEMP2:r[0-7]]],
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89 ; CHECK: add [[TEMP2]], sp
120
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90 ; CHECK: subs r4, r7,
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91 ; CHECK: mov sp, r4
0
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92 %retval = alloca i32, align 4
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93 %tmp = alloca i32, align 4
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94 %a = alloca [805306369 x i8], align 8
0
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95 store i32 0, i32* %tmp
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96 %tmp1 = load i32, i32* %tmp
0
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97 ret i32 %tmp1
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98 }
83
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99
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100 ; Here, the adds get optimized out because they are dead, but the calculation
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101 ; of the address of stack_a is dead but not optimized out. When the address
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102 ; calculation gets expanded to two instructions, we need to avoid reading a
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103 ; dead register.
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104 ; No CHECK lines (just test for crashes), as we hope this will be optimised
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105 ; better in future.
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106 define i32 @test4() {
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107 entry:
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108 %stack_a = alloca i8, align 1
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109 %stack_b = alloca [256 x i32*], align 4
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110 %int = ptrtoint i8* %stack_a to i32
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111 %add = add i32 %int, 1
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112 br label %block2
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113
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114 block2:
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115 %add2 = add i32 %add, 1
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116 ret i32 0
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117 }