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Subject: [Bug target/60732] FAIL: g++.dg/ext/altivec-7.C -std=*  scan-assembler _Z3fooDv*
Date: Wed, 02 Apr 2014 00:37:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60732

--- Comment #2 from Brooks Moses <brooks at gcc dot gnu.org> ---
For the record, here's my GCC mailing-list post associated with that commit:
http://gcc.gnu.org/ml/gcc-patches/2013-10/msg00836.html

As I described there,
> The failure is because the test is searching for mangled names of the
> form "_Z3fooU8__vectorh", which are only generated by ABI versions 1,
> 2, and 3.  As noted in the documentation, "Version 4, which first
> appeared in G++ 4.5, implements a standard mangling for vector types";
> this standard mangling looks like "_Z3fooDv16_h" instead.
> 
> This patch fixes the failure by adjusting the test to look for the
> names using the standard mangling.  It passes with all ABI versions;
> the compiler always emits the standard symbols, and with versions 1,
> 2, and 3 it also emits duplicate symbols with the old mangling."

My immediate guess is that my claim that "the compiler always emits the
standard symbols [from version 4 of the ABI]" is not true on Darwin. 
Dominique, what does the generated assembly look like in the (failing) Darwin
case?