[PATCH] Fix bug 19437 - Only add discriminators for DWARF 4 and above.

[Diego Novillo]

On Thu, Apr 17, 2014 at 4:12 PM, David Blaikie <dblaikie at gmail.com> wrote:

> Adrian - this disabled discriminators for DWARF < 4, but doesn't
> disable them for OSX specifically. If OSX is using the default of
> "current DWARF", it'll need a special case here, right? ("DWARF < 4 ||
> darwin")
>

AFAICT, darwin is using dwarf-2.  When I generated the .ll file for the
test case, I used a darwin target:

$ clang -target x86_64-apple-darwin -g d.c -emit-llvm -S
$ grep 'Dwarf Version' d.ll
!10 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}


Diego.
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