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[tree-ssa] mainline destabilizing tree-ssa?
- From: Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>
- To: gcc at gcc dot gnu dot org
- Date: Mon, 15 Mar 2004 14:28:22 +0100 (CET)
- Subject: [tree-ssa] mainline destabilizing tree-ssa?
Hi!
I trip over more and more problems coming possibly from mainline merges,
like PR14579 or the following ICE
tramp3d-v3.cpp:10547: error: unable to find a register to spill in class
`AREG'
tramp3d-v3.cpp:10547: error: this is the insn:
(insn:HI 38 37 39 2 tramp3d-v3.cpp:10534 (parallel [
(set (reg:SI 1 dx [90])
(truncate:SI (lshiftrt:DI (mult:DI (zero_extend:DI (reg:SI
3 bx [88]))
(zero_extend:DI (reg:SI 1 dx [91])))
(const_int 32 [0x20]))))
(clobber (scratch:SI))
(clobber (reg:CC 17 flags))
]) 179 {*umulsi3_highpart_insn} (insn_list 37 (nil))
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_UNUSED (scratch:SI)
(expr_list:REG_DEAD (reg:SI 3 bx [88])
(expr_list:REG_DEAD (reg:SI 1 dx [91])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_UNUSED (scratch:SI)
(expr_list:REG_EQUAL (truncate:SI (lshiftrt:DI
(mult:DI (zero_extend:DI (reg:SI 3 bx [88]))
(const_double -1431655765
[0xaaaaaaab] 0 [0x0] 0 [0x0] 0 [0x0] 0 [0x0] 0 [0x0]))
(const_int 32 [0x20])))
(nil)))))))))
tramp3d-v3.cpp:10547: internal compiler error: in spill_failure, at
reload1.c:1887
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
triggered by -funroll-loops.
This makes it difficult to provide up-to-date performance comparisons.
Also it seems to require me tracking mainline as well (which I didn't do
for now, as tree-ssa and 3.4 seemed enough) - reporting these problems
against tree-ssa probably makes no sense.
Can we please have more selective mainline merges? I.e. merge only
bugfixes?
Thanks,
Richard.
--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/