Hi Diego,
This is a backport of this patch to fix an ICE on PowerPC64.
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00829.html
-Doug
2012-05-31 Doug Kwan <dougk...@google.com>
Backport r171031 from upstream trunk in gcc/.
2011-03-16 Alan Modra <amo...@gmail.com>
PR target/45844
* config/rs6000/rs6000.c (rs6000_legitimize_reload_address):
Don't create invalid offset address for vsx splat insn.
* config/rs6000/predicates.md (splat_input_operand): New.
* config/rs6000/vsx.md (vsx_splat_*): Use it.
* contrib/testsuite-management/powerpc64-grtev2-linux-gnu.xfail:
Remove expected failures because now the bug is fixed by the above.
Index: contrib/testsuite-management/powerpc64-grtev2-linux-gnu.xfail
===================================================================
--- contrib/testsuite-management/powerpc64-grtev2-linux-gnu.xfail
(revision 188083)
+++ contrib/testsuite-management/powerpc64-grtev2-linux-gnu.xfail
(working copy)
@@ -69,8 +69,6 @@ FAIL: gcc.target/powerpc/pr47755-2.c execution tes
# *** gfortran:
XPASS: gfortran.dg/nint_2.f90 -O0 execution test
-FAIL: gfortran.dg/vect/pr45714-b.f -O (internal compiler error)
-FAIL: gfortran.dg/vect/pr45714-b.f -O (test for excess errors)
FAIL: gfortran.dg/vect/fast-math-pr38968.f90 execution test
# *** g++:
Index: gcc/config/rs6000/predicates.md
===================================================================
--- gcc/config/rs6000/predicates.md (revision 188083)
+++ gcc/config/rs6000/predicates.md (working copy)
@@ -1,5 +1,5 @@
;; Predicate definitions for POWER and PowerPC.
-;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
+;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
;; Free Software Foundation, Inc.
;;
;; This file is part of GCC.
@@ -871,6 +871,23 @@
return 0;
})
+;; Return 1 if this operand is a valid input for a vsx_splat insn.
+(define_predicate "splat_input_operand"
+ (match_code "label_ref,symbol_ref,const,high,reg,subreg,mem,
+ const_double,const_vector,const_int,plus")
+{
+ if (MEM_P (op))
+ {
+ if (mode == DFmode)
+ mode = V2DFmode;
+ else if (mode == DImode)
+ mode = V2DImode;
+ else
+ gcc_unreachable ();
+ }
+ return input_operand (op, mode);
+})
+
;; Return true if OP is an invalid SUBREG operation on the e500.
(define_predicate "rs6000_nonimmediate_operand"
(match_code "reg,subreg,mem")
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 188083)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -6703,6 +6703,14 @@ rs6000_legitimize_reload_address (rtx x, enum mach
{
bool reg_offset_p = reg_offset_addressing_ok_p (mode);
+ /* Nasty hack for vsx_splat_V2DF/V2DI load from mem, which takes a
+ DFmode/DImode MEM. */
+ if (reg_offset_p
+ && opnum == 1
+ && ((mode == DFmode && recog_data.operand_mode[0] == V2DFmode)
+ || (mode == DImode && recog_data.operand_mode[0] == V2DImode)))
+ reg_offset_p = false;
+
/* We must recognize output that we have already generated ourselves. */
if (GET_CODE (x) == PLUS
&& GET_CODE (XEXP (x, 0)) == PLUS
Index: gcc/config/rs6000/vsx.md
===================================================================
--- gcc/config/rs6000/vsx.md (revision 188083)
+++ gcc/config/rs6000/vsx.md (working copy)
@@ -1076,7 +1076,7 @@
(define_insn "vsx_splat_<mode>"
[(set (match_operand:VSX_D 0 "vsx_register_operand" "=wd,wd,wd,?wa,?wa,?wa")
(vec_duplicate:VSX_D
- (match_operand:<VS_scalar> 1 "input_operand" "ws,f,Z,wa,wa,Z")))]
+ (match_operand:<VS_scalar> 1 "splat_input_operand" "ws,f,Z,wa,wa,Z")))]
"VECTOR_MEM_VSX_P (<MODE>mode)"
"@
xxpermdi %x0,%x1,%x1,0
--
This patch is available for review at http://codereview.appspot.com/6255070
