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Rs6000 infrastructure cleanup (switches), revised patch #2f

Message ID 20121019135947.946AF3BABA@mailhost.lps.ens.fr
State New
Headers show

Commit Message

Dominique d'Humières Oct. 19, 2012, 1:59 p.m. UTC 
> > Eric and Dominique could you try it on your respective systems?  Thanks in
> > advance.
>
> It works for me, thanks.

It does not for me:

In file included from ../../work/gcc/config/rs6000/rs6000.c:1475:0:
../../work/gcc/config/rs6000/rs6000-cpus.def:54:0: error: "MASK_STRICT_ALIGN" redefined [-Werror]
 #define MASK_STRICT_ALIGN 0
 ^
In file included from ./tm.h:15:0,
                 from ../../work/gcc/config/rs6000/rs6000.c:24:
../../work/gcc/config/rs6000/rs6000.h:490:0: note: this is the location of the previous definition
 #define MASK_STRICT_ALIGN  OPTION_MASK_STRICT_ALIGN
 ^
cc1plus: all warnings being treated as errors

I had to use the following modified patch


in order to recompile gcc (not a clean bootstrap), i.e.,

+#define OPTION_MASK_STRICT_ALIGN_OPTIONAL 0

and

+#ifndef MASK_STRICT_ALIGN
+#define MASK_STRICT_ALIGN 0
+#endif

I think this patch could be simplied as

+#ifndef OPTION_MASK_STRICT_ALIGN
+#define OPTION_MASK_STRICT_ALIGN 0
+#ifndef MASK_STRICT_ALIGN
+#define MASK_STRICT_ALIGN 0
+#endif
+#endif
#define OPTION_MASK_STRICT_ALIGN_OPTIONAL OPTION_MASK_STRICT_ALIGN

Apparently

 #define MASK_STRICT_ALIGN  OPTION_MASK_STRICT_ALIGN

defines MASK_STRICT_ALIGN (to which value?) even if
OPTION_MASK_STRICT_ALIGN is not defined.

Dominique
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Patch

--- ../_gcc_clean/gcc/config/rs6000/rs6000-cpus.def	2012-10-18 00:34:51.000000000 +0200
+++ ../work/gcc/config/rs6000/rs6000-cpus.def	2012-10-19 14:14:59.000000000 +0200
@@ -46,6 +46,17 @@ 
 
 #define POWERPC_7400_MASK	(OPTION_MASK_PPC_GFXOPT | OPTION_MASK_ALTIVEC)
 
+/* Deal with ports that do not have -mstrict-align.  */
+#ifdef OPTION_MASK_STRICT_ALIGN
+#define OPTION_MASK_STRICT_ALIGN_OPTIONAL OPTION_MASK_STRICT_ALIGN
+#else
+#define OPTION_MASK_STRICT_ALIGN 0
+#define OPTION_MASK_STRICT_ALIGN_OPTIONAL 0
+#ifndef MASK_STRICT_ALIGN
+#define MASK_STRICT_ALIGN 0
+#endif
+#endif
+
 /* Mask of all options to set the default isa flags based on -mcpu=<xxx>.  */
 #define POWERPC_MASKS		(OPTION_MASK_ALTIVEC			\
 				 | OPTION_MASK_CMPB			\
@@ -64,7 +75,7 @@ 
 				 | OPTION_MASK_PPC_GPOPT		\
 				 | OPTION_MASK_RECIP_PRECISION		\
 				 | OPTION_MASK_SOFT_FLOAT		\
-				 | OPTION_MASK_STRICT_ALIGN		\
+				 | OPTION_MASK_STRICT_ALIGN_OPTIONAL	\
 				 | OPTION_MASK_VSX)
 
 #endif