http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50561
Bug #: 50561
Summary: [4.7 regression] ICE when compiling zlib with -O2
-floop-flatten -floop-strip-mine
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: m...@use.net
getting this with trunk r179143, on Ubuntu 11.10/x86-64:
/usr/lib/gcc-snapshot/bin/x86_64-linux-gnu-gcc -O2 -floop-flatten
-floop-strip-mine -c ~/src/trees.i trees.c: In function 'init_block':
trees.c:414:13: internal compiler error: in psct_dynamic_dim, at
graphite-poly.h:659
It doesn't happen with -O1, or if you remove either of the loop options. This
doesn't happen with 4.6.1.
Pre-processed source is attached, but it quick to reproduce with zlib 1.2.3.4
sources.
