| Summary: | [4.2 regression] ICE with const vector | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Volker Reichelt <reichelt> |
| Component: | c++ | Assignee: | Jakub Jelinek <jakub> |
| Status: | RESOLVED FIXED | ||
| Severity: | blocker | CC: | gcc-bugs, ismail, pinskia |
| Priority: | P3 | Keywords: | ice-on-valid-code, monitored |
| Version: | 4.3.0 | ||
| Target Milestone: | 4.3.0 | ||
| Host: | Target: | ||
| Build: | Known to work: | 4.3.0 | |
| Known to fail: | 4.2.5 | Last reconfirmed: | 2008-01-22 09:49:30 |
This is a blocker for me. Confirmed. Confirmed gcc 4.2.2.
test.cc
=====================================================
const int i __attribute((vector_size(8))) = {};
int main(int argc, char **argv)
{
return 0;
}
=====================================================
test.cc:1: internal compiler error: in start_decl, at cp/decl.c:4018
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Testing a fix.
--- tree.c.jj124 2008-01-22 10:46:20.000000000 +0100
+++ tree.c 2008-01-22 10:46:20.000000000 +0100
@@ -3735,6 +3735,8 @@ build_type_attribute_qual_variant (tree
ttype = build_qualified_type (ntype, quals);
}
+ else if (TYPE_QUALS (ttype) != quals)
+ ttype = build_qualified_type (ttype, quals);
return ttype;
}
build_type_attribute_qual_variant wasn't changing quals to the requested ones
if the attributes are equal. This seems to only make a difference for vectors,
as build_type_attribute_qual_variant is static in tree.c and only called
by build_type_attribute_variant which will have always equal quals and
make_vector_type.
Subject: Bug 34917 Author: jakub Date: Tue Jan 22 16:18:14 2008 New Revision: 131726 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131726 Log: PR c++/34917 * tree.c (build_type_attribute_qual_variant): Call build_qualified_type if attributes are equal, but quals are not. * g++.dg/ext/vector12.C: New test. Added: trunk/gcc/testsuite/g++.dg/ext/vector12.C Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree.c Fixed on the trunk. 4.2.3 is being released now, changing milestones of open bugs to 4.2.4. 4.2.4 is being released, changing milestones to 4.2.5. Closing 4.2 branch, fixed in 4.3. |
The following valid code snippet triggers an ICE since GCC 4.2.0: ===================================================== const int i __attribute((vector_size(8))) = {}; ===================================================== bug.cc:1: internal compiler error: in start_decl, at cp/decl.c:4130 Please submit a full bug report, [etc.]