http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46843
Summary: ICE: in spill_failure, at reload1.c:2157
-fschedule-insns -fsched-pressure when using doubles
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 22677
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22677
reduced testcase
Compiler output:
$ gcc -O -fschedule-insns -fsched-pressure pr46843.c
pr46843.c: In function 'foo':
pr46843.c:9:1: error: unable to find a register to spill in class 'CREG'
pr46843.c:9:1: error: this is the insn:
(insn 19 50 9 2 (parallel [
(set (reg/v:SI 0 ax [orig:63 n ] [63])
(ashift:SI (reg:SI 0 ax [84])
(reg:QI 37 r8 [ s ])))
(clobber (reg:CC 17 flags))
]) pr46843.c:3 497 {*ashlsi3_1}
(expr_list:REG_DEAD (reg:SI 0 ax [84])
(expr_list:REG_DEAD (reg:QI 37 r8 [ s ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))))
pr46843.c:9:1: internal compiler error: in spill_failure, at reload1.c:2105
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
-mdispatch-scheduler -march=bdver1 doesn't help in this case (opposing to
PR46829)
Tested revisions:
r167471 - fail
4.5 r166509 - fail
