[llvm] [BOLT][DWARF] Slice .debug_str from the DWP for each CU (PR #159540)

[Alexander Yermolovich via llvm-commits]

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@@ -0,0 +1,77 @@
+; RUN: split-file %p/Inputs/dwarf4-str-split-dwarf.s %t
+; RUN: cd %t
+; RUN: llvm-mc --split-dwarf-file=main.dwo --triple=x86_64-unknown-linux-gnu \
+; RUN: --filetype=obj main.s -o=main.o
+; RUN: llvm-mc --split-dwarf-file=helper.dwo --triple=x86_64-unknown-linux-gnu \
+; RUN: --filetype=obj helper.s -o=helper.o
+; RUN: %clang %cflags -gdwarf-4 -gsplit-dwarf=split main.o helper.o -o main.exe
+; RUN: llvm-dwp -e main.exe -o main.exe.dwp
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str main.exe.dwp \
+; RUN: | FileCheck -check-prefix=PRE-BOLT-STR %s
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str-offsets main.exe.dwp \
+; RUN: | FileCheck -check-prefix=PRE-BOLT-STR-OFFSETS %s
+; RUN: llvm-bolt main.exe -o main.exe.bolt --update-debug-sections
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str main.dwo.dwo \
+; RUN: | FileCheck -check-prefix=BOLT-MAIN-STR %s
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str-offsets main.dwo.dwo \
+; RUN: | FileCheck -check-prefix=BOLT-MAIN-STR-OFFSETS %s
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str helper.dwo.dwo \
+; RUN: | FileCheck -check-prefix=BOLT-HELPER-STR %s
+; RUN: llvm-dwarfdump --show-form --verbose --debug-str-offsets helper.dwo.dwo \
+; RUN: | FileCheck -check-prefix=BOLT-HELPER-STR-OFFSETS %s
+
+;; For DWARF4.
+;; Test input into bolt a DWP file.
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ayermolo wrote:

It's not quite clear from description what this test does.
Can you rephrase that this tests checks that strings are split correctly from a combined section in DWP file, into appropriate .dwo files.

https://github.com/llvm/llvm-project/pull/159540