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Author SHA1 Message Date
Jonas Devlieghere 49ff4d9041 [DWARF] Unclamp line table version on Darwin for v5 and later. 
On Darwin we pin the DWARF line tables to version 2. Stop doing so for
DWARF v5 and later.

Differential revision: https://reviews.llvm.org/D49381

llvm-svn: 339288
 2018-08-08 21:16:50 +00:00
Fangrui Song ee15d3dcdb Move `REQUIRES:` line to the top 
llvm-svn: 335635
 2018-06-26 17:44:23 +00:00
Paul Robinson 547adcaaac [DWARF] Warn on and ignore ".file 0" for DWARF v4 and earlier. 
This had been messing with the directory table for prior versions, and
also could induce a crash when generating asm output.

llvm-svn: 335254
 2018-06-21 16:42:03 +00:00
Paul Robinson 8e3e374e5f [DWARF] Don't keep a ref to possibly stack allocated data. 
llvm-svn: 335146
 2018-06-20 17:08:46 +00:00
Paul Robinson f69316c617 [DWARFv5] llvm-mc -dwarf-version does not imply -g. 
Don't provide the assembler source as the "root file" unless the user
asked to have debug info for the assembler source (with -g).

If the source doesn't provide an explicit ".file 0" then (a) use the
compilation directory as directory #0, and (b) use the file #1 info
for file #0 also.

Differential Revision: https://reviews.llvm.org/D48055

llvm-svn: 334512
 2018-06-12 16:09:03 +00:00
Justin Bogner 65c9e3dd17 Specify REQUIRES: default_triple in a few tests 
These were all failing when specifying LLVM_DEFAULT_TARGET_TRIPLE=''.

llvm-svn: 330977
 2018-04-26 19:15:25 +00:00
Paul Robinson b271f31d8d Reapply "[DWARFv5] Emit file 0 to the line table." 
DWARF v5 specifies that the root file (also given in the DW_AT_name
attribute of the compilation unit DIE) should be emitted explicitly to
the line table's list of files.  This makes the line table more
independent of the .debug_info section.
We emit the new syntax only for DWARF v5 and later.

Fixes the bug found by asan. Also XFAIL the new test for Darwin, which
is stuck on DWARF v2, and fix up other tests so they stop failing on
Windows.  Last but not least, don't break "clang -g" of an assembler
file that has .file directives in it.

Differential Revision: https://reviews.llvm.org/D44054

llvm-svn: 328805
 2018-03-29 17:16:41 +00:00
Alexander Potapenko 202f809437 Revert "Reapply "[DWARFv5] Emit file 0 to the line table."" 
This reverts commit r328676.

Commit r328676 broke the -no-integrated-as flag necessary to build Linux kernel with Clang:

$ cat t.c
void foo() {}
$ clang -no-integrated-as   -c  t.c -g
/tmp/t-dcdec5.s: Assembler messages:
/tmp/t-dcdec5.s:8: Error: file number less than one
clang-7.0: error: assembler command failed with exit code 1 (use -v to see invocation)

llvm-svn: 328699
 2018-03-28 12:36:46 +00:00
Paul Robinson 07480bd177 Reapply "[DWARFv5] Emit file 0 to the line table." 
DWARF v5 specifies that the root file (also given in the DW_AT_name
attribute of the compilation unit DIE) should be emitted explicitly to
the line table's list of files.  This makes the line table more
independent of the .debug_info section.

Fixes the bug found by asan. Also XFAIL the new test for Darwin, which
is stuck on DWARF v2, and fix up other tests so they stop failing on
Windows.  Last but not least, don't break "clang -g" of an assembler
file that has .file directives in it.

Differential Revision: https://reviews.llvm.org/D44054

llvm-svn: 328676
 2018-03-27 22:40:34 +00:00
Alexander Kornienko e12a48bcc0 Revert "Reapply "[DWARFv5] Emit file 0 to the line table."" 
This reverts commit r326839.

r326839 breaks assembly file parsing:

$ cat q.c
void g() {}
$ clang -S q.c -g
$ clang -g -c q.s
q.s:9:2: error: file number already allocated
     .file   1 "/tmp/test" "q.c"
     ^

llvm-svn: 326902
 2018-03-07 16:27:44 +00:00
Paul Robinson 4428e90efa Reapply "[DWARFv5] Emit file 0 to the line table." 
Fixes the bug found by asan. Also XFAIL the new test for Darwin,
which is stuck on DWARF v2, and fix up other tests so they stop
failing on Windows.

llvm-svn: 326839
 2018-03-06 22:37:45 +00:00
Paul Robinson 732e443bb9 Revert "[DWARFv5] Emit file 0 to the line table." 
Caused an asan failure.

This reverts commit d54883f081186cdcce74e6f98cfc0438579ec019.
aka r326758

llvm-svn: 326762
 2018-03-06 03:15:21 +00:00
Paul Robinson d5069ba3da [DWARFv5] Emit file 0 to the line table. 
DWARF v5 specifies that the root file (also given in the DW_AT_name
attribute of the compilation unit DIE) should be emitted explicitly to
the line table's list of files.  This makes the line table more
independent of the .debug_info section.

Differential Revision: https://reviews.llvm.org/D44054

llvm-svn: 326758
 2018-03-06 01:59:56 +00:00