http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46248
Summary: 4.6 regression: crash+infinite recursion in combine
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: astra...@ithinksw.com
Created attachment 22210
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22210
source
gcc r166084 crashes compiling ffmpeg libpostproc on x86-64-apple-darwin10.
Minimized-ish source attached.
> gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc46/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc46/libexec/gcc/x86_64-apple-darwin10.4.0/4.6.0/lto-wrapper
Target: x86_64-apple-darwin10.4.0
Configured with: ../../src/gcc/configure --prefix=/usr/local/gcc46
--with-arch=native --with-tune=native --disable-nls --with-gmp=/sw
--disable-bootstrap --enable-languages=c,c++,lto,objc,obj-c++
Thread model: posix
gcc version 4.6.0 20101030 (experimental) (GCC)
> gcc -O3 -S postprocess.i
gcc: internal compiler error: Segmentation fault (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Backtrace:
#0 0x000000010031fc34 in if_then_else_cond (x=0x1425e14b0,
ptrue=0x7fff5f400078, pfalse=0x7fff5f400068) at
../../../src/gcc/gcc/combine.c:8471
#1 0x000000010031fd82 in if_then_else_cond (x=0x1425e1498,
ptrue=0x7fff5f400118, pfalse=0x7fff5f400108) at
../../../src/gcc/gcc/combine.c:8507
#2 0x000000010031fd82 in if_then_else_cond (x=0x1425e14b0,
ptrue=0x7fff5f4001b8, pfalse=0x7fff5f4001a8) at
../../../src/gcc/gcc/combine.c:8507
#3 0x000000010031fd82 in if_then_else_cond (x=0x1425e1498,
ptrue=0x7fff5f400258, pfalse=0x7fff5f400248) at
../../../src/gcc/gcc/combine.c:8507
#4 0x000000010031fd82 in if_then_else_cond (x=0x1425e14b0,
ptrue=0x7fff5f4002f8, pfalse=0x7fff5f4002e8) at
../../../src/gcc/gcc/combine.c:8507
#5 0x000000010031fd82 in if_then_else_cond (x=0x1425e1498,
ptrue=0x7fff5f400398, pfalse=0x7fff5f400388) at
../../../src/gcc/gcc/combine.c:8507
#6 0x000000010031fd82 in if_then_else_cond (x=0x1425e14b0,
ptrue=0x7fff5f400438, pfalse=0x7fff5f400428) at
../../../src/gcc/gcc/combine.c:8507
...
