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[Patch]: Fix ICE on VMS when using SImode pointers
- From: Tristan Gingold <gingold at adacore dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Cc: Richard Guenther <rguenther at suse dot de>
- Date: Wed, 4 Apr 2012 10:13:37 +0200
- Subject: [Patch]: Fix ICE on VMS when using SImode pointers
Hi,
this patch fixes a build time failure on VMS (while compiling Ada RTS file i-cstrin.adb) due to the use of short pointers:
i-cstrin.adb: In function 'Interfaces.C.Strings.To_Chars_Ptr':
i-cstrin.adb:236:8: error: unrecognizable insn:
(insn 80 79 81 13 (set (reg:SI 384)
(const_int 4294967288 [0xfffffff8])) i-cstrin.adb:234 -1
(nil))
+===========================GNAT BUG DETECTED==============================+
| Pro 7.1.0w (20120403-47) (ia64-hp-openvms) GCC error: |
| in extract_insn, at recog.c:2123 |
| Error detected around i-cstrin.adb:236:8 |
Expansion of POINTER_PLUS_EXPR doesn't handle the case of PRECISION(sizetype) > PRECISION(type), leading to RTL expressions with different modes.
This patch fixes the build issue, tested on ia64-hp-openvms.
Also tested with our internal testsuite.
I haven't run the GCC testsuite on a regular platform, as the condition will never trigger.
Ok for trunk ?
Tristan.
2012-04-04 Tristan Gingold <gingold@adacore.com>
* expr.c (expand_expr_real_2): Handle larger sizetype in
POINTER_PLUS_EXPR.
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -7957,6 +7957,9 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_m
treeop1 = fold_convert_loc (loc, type,
fold_convert_loc (loc, ssizetype,
treeop1));
+ else if (TYPE_PRECISION (sizetype) > TYPE_PRECISION (type))
+ treeop1 = fold_convert_loc (loc, type, treeop1);
+
case PLUS_EXPR:
/* If we are adding a constant, a VAR_DECL that is sp, fp, or ap, and
something else, make sure we add the register to the constant and
u