llvm-project/bolt/test/X86/dwarf5-addr-section-reuse.s
Alexander Yermolovich f230099c13 [BOLT][DWARF] Reuse entries in .debug_addr when not modified
In some binaries produced with ThinLTO there are CUs that share entry in
.debug_addr. Before we would generate a new entry for each. Which lead to binary
size increase. This changes the behavior so that we re-use entries in
.debug_addr.

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D142425
2023-01-24 15:55:03 -08:00

19 lines
1.1 KiB
ArmAsm

# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-main-addr-section-reuse.s -o %tmain.o
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-helper1-addr-section-reuse.s -o %thelper1.o
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-helper2-addr-section-reuse.s -o %thelper2.o
# RUN: %clang %cflags -dwarf-5 %tmain.o %thelper1.o %thelper2.o -o %t.exe -Wl,-q
# RUN: llvm-dwarfdump --debug-info %t.exe | FileCheck --check-prefix=PRECHECK %s
# RUN: llvm-bolt %t.exe -o %t.exe.bolt --update-debug-sections
# RUN: llvm-dwarfdump --debug-info %t.exe.bolt | FileCheck --check-prefix=POSTCHECK %s
# This test checks that when a binary is bolted if CU is not modified and has DW_AT_addr_base that is shared
# after being bolted CUs still share same entry in .debug_addr.
# PRECHECK: DW_AT_addr_base (0x00000008)
# PRECHECK: DW_AT_addr_base (0x00000008)
# PRECHECK: DW_AT_addr_base (0x00000008)
# POSTCHECK: DW_AT_addr_base (0x00000008)
# POSTCHECK: DW_AT_addr_base (0x00000020)
# POSTCHECK: DW_AT_addr_base (0x00000020)