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Re: c/8730: [3.2/3.3 regression] Cannot compile C function inside other C function
- From: Janis Johnson <janis187 at us dot ibm dot com>
- To: info at ilghiz dot com, gcc-gnats at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, ilgis at num dot uni-sb dot de, gcc-bugs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Date: Tue, 24 Dec 2002 12:26:10 -0800
- Subject: Re: c/8730: [3.2/3.3 regression] Cannot compile C function inside other C function
- Organization: IBM
- Reply-to: janis187 at us dot ibm dot com
The regression reported in PR c/8730 showed up starting
with this large patch from long, long ago:
Sat Nov 27 08:38:26 1999 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* fold-const.c (negate_expr, associate_trees, extract_muldiv):
New.
(split_tree): Completely rework to make more general.
(make_range, fold): Call negate_expr.
(fold, case NEGATE_EXPR): Simplify -(a-b) is -ffast-math.
(fold, associate): Call new split_tree and associate_trees.
(fold, case MULT_EXPR, case *_{DIV,MOD}_EXPR): Call
extract_muldiv.
Here's a small test case that causes the compiler to ICE when compiled
on i686-linux with the mainline:
-------------------
void foo() {
void *bar (int i, int A[1][i]) { return A[0]; };
};
-------------------
The behavior changes with the same patch for the submitter's
test case.
Output from the the mainline:
8730.c: In function `bar':
8730.c:2: internal compiler error: in expand_expr, at expr.c:6823
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8730