1 # RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - \ 2 # RUN: | llvm-objdump -disassemble -no-show-raw-insn - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-OPT %s 3 # RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu -mc-relax-all %s -o - \ 4 # RUN: | llvm-objdump -disassemble -no-show-raw-insn - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-RELAX %s 5 6 # Test simple NOP insertion for single instructions. 7 8 .text 9 foo: 10 # Will be bundle-aligning to 16 byte boundaries 11 .bundle_align_mode 4 12 pushq %rbp 13 pushq %r14 14 pushq %rbx 15 16 movl %edi, %ebx 17 callq bar 18 movl %eax, %r14d 19 20 imull $17, %ebx, %ebp 21 # This imull is 3 bytes long and should have started at 0xe, so two bytes 22 # of nop padding are inserted instead and it starts at 0x10 23 # CHECK: nop 24 # CHECK-NEXT: 10: imull 25 26 movl %ebx, %edi 27 callq bar 28 cmpl %r14d, %ebp 29 # CHECK-RELAX: nopl 30 jle .L_ELSE 31 # Due to the padding that's inserted before the addl, the jump target 32 # becomes farther by one byte. 33 # CHECK-OPT: jle 5 34 # CHECK-RELAX: jle 7 35 36 addl %ebp, %eax 37 # CHECK-OPT: nop 38 # CHECK-OPT-NEXT:20: addl 39 # CHECK-RELAX: 26: addl 40 41 jmp .L_RET 42 .L_ELSE: 43 imull %ebx, %eax 44 .L_RET: 45 ret 46 47 # Just sanity checking that data fills don't drive bundling crazy 48 .data 49 .byte 40 50 .byte 98 51 52 53
