[PATCH] Fix (parts of) PR68273

[PATCH] Fix (parts of) PR68273

[Richard Biener]

The following patch avoids overaligned types created from IPA parameter
replacement.  It is said to help mipsel which still suffers from the
backend-looks-at-type-alignment-for-parameter-passing-ABI bug.

Bootstrap and regtest pending on x86_64-unknown-linux-gnu.

mips testing appreciated.

Richard.

2016-08-05  Richard Biener  <rguenther@suse.de>

	PR ipa/68273
	* ipa-prop.c (ipa_modify_formal_parameters): Build
	parameter types with natural alignment also for the
	over-aligned case.

Index: gcc/ipa-prop.c
===================================================================
--- gcc/ipa-prop.c	(revision 239164)
+++ gcc/ipa-prop.c	(working copy)
@@ -3910,7 +3909,7 @@ ipa_modify_formal_parameters (tree fndec
 	      if (is_gimple_reg_type (ptype))
 		{
 		  unsigned malign = GET_MODE_ALIGNMENT (TYPE_MODE (ptype));
-		  if (TYPE_ALIGN (ptype) < malign)
+		  if (TYPE_ALIGN (ptype) != malign)
 		    ptype = build_aligned_type (ptype, malign);
 		}
 	    }

RE: [PATCH] Fix (parts of) PR68273

[Matthew Fortune]

Richard Biener <rguenther@suse.de> writes:
> The following patch avoids overaligned types created from IPA parameter
> replacement.  It is said to help mipsel which still suffers from the
> backend-looks-at-type-alignment-for-parameter-passing-ABI bug.
> 
> Bootstrap and regtest pending on x86_64-unknown-linux-gnu.
> 
> mips testing appreciated.

Thanks Richard.

Regtest on mips-linux-gnu for mips32r2 is fine. My bootstrap failed for
unrelated reasons.

Matthew