06f13f8684
When we call setIgnored() on functions that already have CFG built, these functions are not going to get emitted and we risk missing external function references being updated. To mitigate the potential issues, run scanExternalRefs() on such functions to create patches/relocations. Since scanExternalRefs() relies on function relocations, we have to preserve relocations until the function is emitted. As a result, the memory overhead without debug info update could reach up to 2%.
45 lines
1.0 KiB
ArmAsm
45 lines
1.0 KiB
ArmAsm
## Check that llvm-bolt patches functions that are getting ignored after their
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## CFG was constructed.
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# RUN: %clang %cflags %s -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe -o %t.bolt 2>&1 | FileCheck %s
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# RUN: llvm-objdump -d %t.bolt | FileCheck %s --check-prefix=CHECK-OBJDUMP
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.text
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## After the CFG is built, the following function will be marked as ignored
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## due to the presence of the internal call.
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# CHECK: BOLT-WARNING: will skip the following function
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# CHECK-NEXT: internal_call
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.globl internal_call
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.type internal_call, %function
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internal_call:
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.cfi_startproc
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# CHECK-OBJDUMP: <internal_call>:
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call .L1
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jmp .L2
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# CHECK-OBJDUMP: jmp
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.L1:
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jmp _start
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# CHECK-OBJDUMP: jmp
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# CHECK-OBJDUMP-SAME: <_start>
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ret
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.L2:
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jmp _start
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# CHECK-OBJDUMP: jmp
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# CHECK-OBJDUMP-SAME: <_start>
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.cfi_endproc
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.size internal_call, .-internal_call
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.globl _start
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.type _start, %function
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_start:
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.cfi_startproc
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cmpq %rdi, 1
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jne .L0
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movq %rdi, %rax
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.L0:
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ret
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.cfi_endproc
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.size _start, .-_start
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