## Check that BOLT can correctly use relocations to symbolize instruction ## operands when an instruction can have up to two relocations associated ## with it. The test checks that the update happens in the function that ## is not being optimized/relocated by BOLT. # REQUIRES: system-linux # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-linux %s -o %t.o # RUN: ld.lld %t.o -o %t.exe -q --image-base=0x80000 --Ttext=0x80000 # RUN: llvm-bolt %t.exe --relocs -o %t.bolt --funcs=foo # RUN: llvm-objdump -d --print-imm-hex %t.exe \ # RUN: | FileCheck %s # RUN: llvm-objdump -d --print-imm-hex %t.bolt \ # RUN: | FileCheck %s --check-prefix=CHECK-POST-BOLT .text .globl foo .type foo,@function foo: .cfi_startproc ret .cfi_endproc .size foo, .-foo .text .globl _start .type _start,@function _start: .cfi_startproc ## All four MOV instructions below are identical in the input binary, but ## different from each other after BOLT. ## ## foo value is 0x80000 pre-BOLT. Using relocations, llvm-bolt should correctly ## symbolize 0x80000 instruction operand and differentiate between an immediate ## constant 0x80000 and a reference to foo. When foo is relocated, BOLT should ## update references even from the code that is not being updated. # CHECK: 80000 : # CHECK: <_start>: # CHECK-POST-BOLT: <_start>: movq $0x80000, 0x80000 # CHECK-NEXT: movq $0x80000, 0x80000 # CHECK-POST-BOLT-NEXT: movq $0x80000, 0x80000 movq $foo, 0x80000 # CHECK-NEXT: movq $0x80000, 0x80000 # CHECK-POST-BOLT-NEXT: movq $0x[[#%x,ADDR:]], 0x80000 movq $0x80000, foo # CHECK-NEXT: movq $0x80000, 0x80000 # CHECK-POST-BOLT-NEXT: movq $0x80000, 0x[[#ADDR]] movq $foo, foo # CHECK-NEXT: movq $0x80000, 0x80000 # CHECK-POST-BOLT-NEXT: movq $0x[[#ADDR]], 0x[[#ADDR]] ## After BOLT, foo is relocated after _start. # CHECK-POST-BOLT: [[#ADDR]] : retq .size _start, .-_start .cfi_endproc