https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64015
Bug ID: 64015
Summary: [5.0 Regression] AArch64 ICE due to conditional
compare
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
CC: zhenqiang.chen at arm dot com
Target: aarch64*
Created attachment 34065
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34065&action=edit
Reduced testcase
Attached testcase ICEs with:
ice.c: In function 'test':
ice.c:4:1: error: unrecognizable insn:
}
^
(insn 8 7 9 2 (set (reg:CC_DGTU 66 cc)
(compare:CC_DGTU (and:SI (ne:SI (reg:CC_DGTU 66 cc)
(const_int 0 [0]))
(gtu:SI (reg/v:SI 79 [ b ])
(const_int 252 [0xfc])))
(const_int 0 [0]))) ice.c:3 -1
(nil))
I've tracked it down to the aarch64 conditional compare patches. r217638 works
whereas r217646 has the ICE.
-O2 should be enough to reproduce.
Zhenqiang, can you take a look please?
