| # REQUIRES: x86 |
| ## basic-block-sections tests. |
| ## This simple test checks if redundant direct jumps are converted to |
| ## implicit fallthrus when PC32 reloc is present. The jcc's must be converted |
| ## to their inverted opcode, for instance jne to je and jmp must be deleted. |
| |
| # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o |
| # RUN: llvm-objdump -dr %t.o| FileCheck %s --check-prefix=RELOC |
| # RUN: ld.lld --optimize-bb-jumps %t.o -o %t.out |
| # RUN: llvm-objdump -d %t.out| FileCheck %s |
| |
| # RELOC: jmp |
| # RELOC-NEXT: R_X86_64_PC32 |
| |
| # CHECK: <foo>: |
| # CHECK-NEXT: nopl (%rax) |
| # CHECK-NEXT: jne 0x{{[[:xdigit:]]+}} <r.BB.foo> |
| # CHECK-NOT: jmp |
| |
| |
| .section .text,"ax",@progbits |
| .type foo,@function |
| foo: |
| nopl (%rax) |
| je a.BB.foo |
| # Encode a jmp r.BB.foo insn using a PC32 reloc |
| .byte 0xe9 |
| .long r.BB.foo - . - 4 |
| |
| # CHECK: <a.BB.foo>: |
| # CHECK-NEXT: nopl (%rax) |
| |
| .section .text,"ax",@progbits,unique,3 |
| a.BB.foo: |
| nopl (%rax) |
| r.BB.foo: |
| ret |
