llvm-capstone/bolt/test/X86/dwarf4-subprogram-multiple-ranges.test
Alexander Yermolovich 75f770a68f [BOLT][DWARF] Update handling of size 1 ranges and fix sub-programs with ranges
When output range is only one entry, and input is low_pc/high_pc do not convert
to ranges. This helps with size of .debug_ranges/.debug_rnglists. It also helps
when either low_pc/high_pc is 0. We not generating potentially invalid ranges
that result in LLDB error.

Also fixed handling of DW_AT_subprogram with ranges. This can be created with
-fbasic-block-sections=all.

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D156374
2023-07-30 17:32:32 -07:00

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# REQUIRES: system-linux
# RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf4-subprogram-multiple-ranges-main.s -o %t1.o
# RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
# RUN: llvm-objdump %t.bolt --disassemble > %t1.txt
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt >> %t1.txt
# RUN: cat %t1.txt | FileCheck --check-prefix=POSTCHECK %s
# This test checks BOLT correctly handles DW_TAG_subprogram with Ranges with multiple entries.
# POSTCHECK: _Z7doStuffi>:
# POSTCHECK: [[#%.6x,ADDR:]]
# POSTCHECK: _Z7doStuffi.__part.1>:
# POSTCHECK-NEXT: [[#%.6x,ADDR1:]]
# POSTCHECK: _Z7doStuffi.__part.2>:
# POSTCHECK-NEXT: [[#%.6x,ADDR2:]]
# POSTCHECK: DW_TAG_subprogram
# POSTCHECK-NEXT: DW_AT_ranges
# POSTCHECK-NEXT: [0x0000000000[[#ADDR1]], 0x0000000000[[#ADDR1 + 0xb]])
# POSTCHECK-NEXT: [0x0000000000[[#ADDR2]], 0x0000000000[[#ADDR2 + 0x5]])
# POSTCHECK-NEXT: [0x0000000000[[#ADDR]], 0x0000000000[[#ADDR + 0xf]]))