| Sriraman Tallam | 9431787 | 2020-04-07 13:48:18 | [diff] [blame] | 1 | # REQUIRES: x86 |
| Sriraman Tallam | ca6b6d4 | 2020-07-31 18:14:49 | [diff] [blame] | 2 | ## basic-block-sections tests. |
| Sriraman Tallam | 9431787 | 2020-04-07 13:48:18 | [diff] [blame] | 3 | ## This simple test checks if redundant direct jumps are converted to |
| 4 | ## implicit fallthrus. The jcc's must be converted to their inverted |
| 5 | ## opcode, for instance jne to je and jmp must be deleted. |
| 6 | |
| 7 | # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o |
| 8 | # RUN: ld.lld --optimize-bb-jumps %t.o -o %t.out |
| 9 | # RUN: llvm-objdump -d %t.out| FileCheck %s |
| 10 | |
| 11 | # CHECK: <foo>: |
| 12 | # CHECK-NEXT: nopl (%rax) |
| 13 | # CHECK-NEXT: jne 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 14 | # CHECK-NOT: jmp |
| 15 | |
| 16 | |
| 17 | .section .text,"ax",@progbits |
| 18 | .type foo,@function |
| 19 | foo: |
| 20 | nopl (%rax) |
| 21 | je a.BB.foo |
| 22 | jmp r.BB.foo |
| 23 | |
| 24 | # CHECK: <a.BB.foo>: |
| 25 | # CHECK-NEXT: nopl (%rax) |
| 26 | # CHECK-NEXT: je 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 27 | # CHECK-NOT: jmp |
| 28 | |
| 29 | .section .text,"ax",@progbits,unique,3 |
| 30 | a.BB.foo: |
| 31 | nopl (%rax) |
| 32 | jne aa.BB.foo |
| 33 | jmp r.BB.foo |
| 34 | |
| 35 | # CHECK: <aa.BB.foo>: |
| 36 | # CHECK-NEXT: nopl (%rax) |
| 37 | # CHECK-NEXT: jle 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 38 | # CHECK-NOT: jmp |
| 39 | # |
| 40 | .section .text,"ax",@progbits,unique,4 |
| 41 | aa.BB.foo: |
| 42 | nopl (%rax) |
| 43 | jg aaa.BB.foo |
| 44 | jmp r.BB.foo |
| 45 | |
| 46 | # CHECK: <aaa.BB.foo>: |
| 47 | # CHECK-NEXT: nopl (%rax) |
| 48 | # CHECK-NEXT: jl 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 49 | # CHECK-NOT: jmp |
| 50 | # |
| 51 | .section .text,"ax",@progbits,unique,5 |
| 52 | aaa.BB.foo: |
| 53 | nopl (%rax) |
| 54 | jge aaaa.BB.foo |
| 55 | jmp r.BB.foo |
| 56 | |
| 57 | # CHECK: <aaaa.BB.foo>: |
| 58 | # CHECK-NEXT: nopl (%rax) |
| 59 | # CHECK-NEXT: jae 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 60 | # CHECK-NOT: jmp |
| 61 | # |
| 62 | .section .text,"ax",@progbits,unique,6 |
| 63 | aaaa.BB.foo: |
| 64 | nopl (%rax) |
| 65 | jb aaaaa.BB.foo |
| 66 | jmp r.BB.foo |
| 67 | |
| 68 | # CHECK: <aaaaa.BB.foo>: |
| 69 | # CHECK-NEXT: nopl (%rax) |
| 70 | # CHECK-NEXT: ja 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 71 | # CHECK-NOT: jmp |
| 72 | # |
| 73 | .section .text,"ax",@progbits,unique,7 |
| 74 | aaaaa.BB.foo: |
| 75 | nopl (%rax) |
| 76 | jbe aaaaaa.BB.foo |
| 77 | jmp r.BB.foo |
| 78 | |
| 79 | # CHECK: <aaaaaa.BB.foo>: |
| 80 | # CHECK-NEXT: nopl (%rax) |
| 81 | # CHECK-NEXT: jge 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 82 | # CHECK-NOT: jmp |
| 83 | # |
| 84 | .section .text,"ax",@progbits,unique,8 |
| 85 | aaaaaa.BB.foo: |
| 86 | nopl (%rax) |
| 87 | jl aaaaaaa.BB.foo |
| 88 | jmp r.BB.foo |
| 89 | |
| 90 | # CHECK: <aaaaaaa.BB.foo>: |
| 91 | # CHECK-NEXT: nopl (%rax) |
| 92 | # CHECK-NEXT: jg 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 93 | # CHECK-NOT: jmp |
| 94 | # |
| 95 | .section .text,"ax",@progbits,unique,9 |
| 96 | aaaaaaa.BB.foo: |
| 97 | nopl (%rax) |
| 98 | jle aaaaaaaa.BB.foo |
| 99 | jmp r.BB.foo |
| 100 | |
| 101 | # CHECK: <aaaaaaaa.BB.foo>: |
| 102 | # CHECK-NEXT: nopl (%rax) |
| 103 | # CHECK-NEXT: jbe 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 104 | # CHECK-NOT: jmp |
| 105 | # |
| 106 | .section .text,"ax",@progbits,unique,10 |
| 107 | aaaaaaaa.BB.foo: |
| 108 | nopl (%rax) |
| 109 | ja aaaaaaaaa.BB.foo |
| 110 | jmp r.BB.foo |
| 111 | |
| 112 | # CHECK: <aaaaaaaaa.BB.foo>: |
| 113 | # CHECK-NEXT: nopl (%rax) |
| 114 | # CHECK-NEXT: jb 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| 115 | # CHECK-NOT: jmp |
| 116 | # |
| 117 | .section .text,"ax",@progbits,unique,11 |
| 118 | aaaaaaaaa.BB.foo: |
| 119 | nopl (%rax) |
| 120 | jae aaaaaaaaaa.BB.foo |
| 121 | jmp r.BB.foo |
| 122 | |
| 123 | .section .text,"ax",@progbits,unique,20 |
| 124 | aaaaaaaaaa.BB.foo: |
| 125 | nopl (%rax) |
| 126 | |
| 127 | r.BB.foo: |
| 128 | ret |
