[PATCH] D11001: Add support for System z vector language extensions

Ulrich Weigand ulrich.weigand at de.ibm.com
Thu Jul 30 07:07:27 PDT 2015

uweigand marked an inline comment as done.
uweigand added a comment.

In http://reviews.llvm.org/D11001#214817, @rsmith wrote:

> LGTM, sorry for the delay. Please remove the `-mzvector` flag if we don't actually need it for GCC compatibility.

Thanks for the review!  We do in fact need the `-mzvector` flag for GCC compatibility, see below.

Comment at: include/clang/Driver/Options.td:1330-1333
@@ -1329,1 +1329,6 @@
+def fzvector : Flag<["-"], "fzvector">, Group<f_Group>, Flags<[CC1Option]>,
+  HelpText<"Enable System z vector language extension">;
+def fno_zvector : Flag<["-"], "fno-zvector">, Group<f_Group>,
+  Flags<[CC1Option]>;
+def mzvector : Flag<["-"], "mzvector">, Alias<fzvector>;
rsmith wrote:
> Does GCC really support `-mzvector`? I can't find any reference to such a flag, and grepping the GCC sources finds no occurrences of the string "zvector" at all.
The flag is implemented here in the GCC sources:

Target Report Mask(ZVECTOR)
Enable the z vector language extension providing the context-sensitive vector macro.

(You're right that this flag currently does not show up in the GCC documentation. That was an oversight. I've asked Andreas to fix this.)

Comment at: include/clang/Parse/Parser.h:115
@@ -116,1 +114,3 @@
   IdentifierInfo *Ident_bool;
+  /// Ident_pixel - cached cached IdentifierInfos for "pixel" fast comparison.
+  /// Only present if AltiVec enabled.
rsmith wrote:
> Too many "cached"s


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