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39d709618f
llvm-mc or clang with -g normally produces debug info describing the assembler source itself; however, if that source already contains some .file/.loc directives, we should instead emit the debug info described by those directives. For certain assembler sources seen in the wild (particularly in the Chrome build) this was causing a crash due to incorrect assumptions about legal sequences of assembler source text. Fixes PR38994. Differential Revision: https://reviews.llvm.org/D63573 llvm-svn: 364039
25 lines
910 B
ArmAsm
25 lines
910 B
ArmAsm
## Make sure that using -g (or equivalent) on an asm file that already has
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## debug-info directives in it will correctly ignore the -g and produce
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## debug info corresponding to the directives in the source.
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## Note gcc accepts ".file 1" after a label, although not after an opcode.
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## If no other directives appear, gcc emits no debug info at all.
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# RUN: llvm-mc -g -triple i386-unknown-unknown -filetype=obj %s -o %t
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# RUN: llvm-dwarfdump -debug-info -debug-line %t | FileCheck %s
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foo:
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.file 1 "a.c"
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.loc 1 1 1
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nop
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# CHECK: .debug_info
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## gcc does generate a DW_TAG_compile_unit in this case, with or without
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## -g on the command line, but we do not.
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# CHECK-EMPTY:
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# CHECK_NEXT: .debug_line
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# CHECK: file_names[ 1]:
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# CHECK-NEXT: name: "a.c"
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# CHECK-NEXT: dir_index: 0
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# CHECK: 0x{{0+}}0 1 1 1 0 0 is_stmt
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# CHECK: 0x{{0+}}1 1 1 1 0 0 is_stmt end_sequence
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