http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46666
Summary: gcc.target/i386/funcspec-3.c ICEs in count_reg_usage
(cse.c:6596) with -fno-early-inlining
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Target: x86_64-pc-linux-gnu
Created attachment 22534
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22534
reduced testcase
Compiler output:
$ gcc -O -fno-early-inlining funcspec-3.i
==32143== Invalid read of size 4
==32143== at 0xF80728: count_reg_usage (cse.c:6596)
==32143== by 0xF80714: count_reg_usage (cse.c:6694)
==32143== by 0xF80714: count_reg_usage (cse.c:6694)
==32143== by 0xF807A1: count_reg_usage (cse.c:6638)
==32143== by 0xF91561: delete_trivially_dead_insns (cse.c:6878)
==32143== by 0xF427BD: cleanup_cfg (cfgcleanup.c:2329)
==32143== by 0x5EB27A: into_cfg_layout_mode (cfglayout.c:349)
==32143== by 0x7EB8AE: execute_one_pass (passes.c:1564)
==32143== by 0x7EBB74: execute_pass_list (passes.c:1619)
==32143== by 0x7EBB86: execute_pass_list (passes.c:1620)
==32143== by 0x92BF05: tree_rest_of_compilation (tree-optimize.c:422)
==32143== by 0xAF0061: cgraph_expand_function (cgraphunit.c:1508)
==32143== Address 0x77b5844 is not stack'd, malloc'd or (recently) free'd
==32143==
==32143== Invalid read of size 2
==32143== at 0x627127: df_ref_record (df-scan.c:2841)
==32143== by 0x6286DD: df_entry_block_defs_collect (df-scan.c:3818)
==32143== by 0x628755: df_record_entry_block_defs (df-scan.c:3835)
==32143== by 0x62DF3A: df_scan_blocks (df-scan.c:670)
==32143== by 0x61730A: rest_of_handle_df_initialize (df-core.c:738)
==32143== by 0x7EB8AE: execute_one_pass (passes.c:1564)
==32143== by 0x7EBB74: execute_pass_list (passes.c:1619)
==32143== by 0x7EBB86: execute_pass_list (passes.c:1620)
==32143== by 0x92BF05: tree_rest_of_compilation (tree-optimize.c:422)
==32143== by 0xAF0061: cgraph_expand_function (cgraphunit.c:1508)
==32143== by 0xAF2639: cgraph_optimize (cgraphunit.c:1567)
==32143== by 0xAF2BA9: cgraph_finalize_compilation_unit (cgraphunit.c:1031)
==32143== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==32143==
/mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/funcspec-3.c: In function
'main':
/mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/funcspec-3.c:60:1: internal
compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Reduced attached testcase fails in a different way:
$ gcc -O -fno-early-inlining testcase.c
==27651== Invalid write of size 4
==27651== at 0xFE82FC: decompose_multiword_subregs (lower-subreg.c:51)
==27651== by 0xFE9CE8: rest_of_handle_lower_subreg (lower-subreg.c:1346)
==27651== by 0x7EB8AE: execute_one_pass (passes.c:1564)
==27651== by 0x7EBB74: execute_pass_list (passes.c:1619)
==27651== by 0x7EBB86: execute_pass_list (passes.c:1620)
==27651== by 0x92BF05: tree_rest_of_compilation (tree-optimize.c:422)
==27651== by 0xAF0061: cgraph_expand_function (cgraphunit.c:1508)
==27651== by 0xAF2639: cgraph_optimize (cgraphunit.c:1567)
==27651== by 0xAF2BA9: cgraph_finalize_compilation_unit (cgraphunit.c:1031)
==27651== by 0x50873B: c_write_global_declarations (c-decl.c:9837)
==27651== by 0x8D5C6F: toplev_main (toplev.c:819)
==27651== by 0x6369BBC: (below main) (in /lib64/libc-2.11.2.so)
==27651== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==27651==
testcase.c: In function 'foo':
testcase.c:11:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
