| Summary: | [7 Regression] ICE on -Os and above in both 32-bit and 64-bit modes on x86_64-linux-gnu (internal compiler error: in VN_INFO_GET, at tree-ssa-sccvn.c:407 }) | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Chengnian Sun <chengniansun> |
| Component: | tree-optimization | Assignee: | Richard Biener <rguenth> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | Keywords: | ice-on-valid-code |
| Priority: | P1 | ||
| Version: | 7.0.1 | ||
| Target Milestone: | 7.0 | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | 2017-02-27 00:00:00 | |
| Bug Depends on: | |||
| Bug Blocks: | 45397, 79777 | ||
Confirmed. Mine. Testing patch. Author: rguenth Date: Tue Feb 28 15:32:24 2017 New Revision: 245780 URL: https://gcc.gnu.org/viewcvs?rev=245780&root=gcc&view=rev Log: 2017-02-28 Richard Biener <rguenther@suse.de> PR tree-optimization/79740 * tree-ssa-sccvn.c (vn_nary_op_insert_into): Allow redundant inserts. (visit_nary_op): Insert the nary into the hashtable if we pattern-matched sth. * tree-ssa-pre.c (eliminate_insert): Robustify. * gcc.dg/torture/pr79740.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/torture/pr79740.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-pre.c trunk/gcc/tree-ssa-sccvn.c Fixed. (In reply to Richard Biener from comment #6) > Fixed. I still see an identical ICE with ARM64 on r245806. Opening a new PR. |
$ gcc-trunk -v Using built-in specs. COLLECT_GCC=gcc-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/usr/local/gcc-trunk --disable-bootstrap Thread model: posix gcc version 7.0.1 20170227 (experimental) [trunk revision 245760] (GCC) $ $ gcc-trunk -O3 small.c small.c: In function ‘main’: small.c:15:1: internal compiler error: in VN_INFO_GET, at tree-ssa-sccvn.c:407 } ^ 0xddcc76 VN_INFO_GET(tree_node*) ../../gcc-source-trunk/gcc/tree-ssa-sccvn.c:406 0xdb52c8 eliminate_insert ../../gcc-source-trunk/gcc/tree-ssa-pre.c:4133 0xdb52c8 eliminate_dom_walker::before_dom_children(basic_block_def*) ../../gcc-source-trunk/gcc/tree-ssa-pre.c:4267 0x1307ca7 dom_walker::walk(basic_block_def*) ../../gcc-source-trunk/gcc/domwalk.c:265 0xdb5b0f eliminate ../../gcc-source-trunk/gcc/tree-ssa-pre.c:4728 0xdb5e6d execute ../../gcc-source-trunk/gcc/tree-ssa-pre.c:5162 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ $ cat small.c int a; short b; short fn1(unsigned short p1) { return p1 << a; } int main() { short c; int d = 4; for (; b;) { c = d + 1; fn1(c); d = 0; } d++; return 0; } $