Current trunk and 4.1 branch ICE on powerpc-linux compiling facerec
from SPEC CPU2000 with an admittedly odd set of options:
elm3b11% /opt/gcc-nightly/4.1/bin/gfortran -c -O2 -funroll-loops
-ftree-vectorize -maltivec -fno-ivopts -fpic fr1201.f
fr1201.f: In function foo:
fr1201.f:38: error: unrecognizable insn:
(insn 2616 288 289 28 (set (reg:SI 4 4)
(and:SI (plus:SI (reg:SI 26 26)
(reg:SI 0 0 [orig:141 base_off.93 ] [141]))
(const_int -16 [0xfffffffffffffff0]))) -1 (nil)
(nil))
fr1201.f:38: internal compiler error: in extract_insn, at recog.c:2084
The testcase compiles with GCC 4.0.2 and with the 4.0 branch.
A regression hunt identified the following patch:
http://gcc.gnu.org/viewcvs?view=rev&rev=103001
r103001 | dje | 2005-08-11 21:18:11 +0000 (Thu, 11 Aug 2005) | 6 lines
* config/rs6000/altivec.md: Change constraint "m" to "Z".
* config/rs6000/predicates.md (indexed_or_indirect_operand):
Accept address wrapped in AND for Altivec.
* config/rs6000/rs6000.c (rs6000_legitimize_reload_address):
Strip AND wrapping offset address for Altivec.
I'll attach a minimized testcase.
--
Summary: unrecognizable insn for facerec with odd optimization
set
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25212
