* [Bug target/29746] gcc fails to bootstrap on sh4-*-linux-gnu
2006-11-07 2:32 [Bug target/29746] New: gcc fails to bootstrap on sh4-*-linux-gnu kkojima at gcc dot gnu dot org
@ 2006-11-07 2:35 ` kkojima at gcc dot gnu dot org
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From: kkojima at gcc dot gnu dot org @ 2006-11-07 2:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from kkojima at gcc dot gnu dot org 2006-11-07 02:35 -------
Created an attachment (id=12556)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12556&action=view)
a reduced test case
--
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2006-11-07 2:32 [Bug target/29746] New: gcc fails to bootstrap on sh4-*-linux-gnu kkojima at gcc dot gnu dot org
2006-11-07 2:35 ` [Bug target/29746] " kkojima at gcc dot gnu dot org
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From: kkojima at gcc dot gnu dot org @ 2006-11-07 2:38 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from kkojima at gcc dot gnu dot org 2006-11-07 02:37 -------
I've attached a reduced test case which fails also on the cross compiler
with -O2:
foo.c:69: error: insn does not satisfy its constraints:
(insn 232 235 233 9 (set (reg:SI 147 t)
(eq:SI (reg:SI 8 r8 [orig:169 diff ] [169])
(const_int 1 [0x1]))) 1 {cmpeqsi_t} (nil)
(nil))
The .greg dump for it has a cbranchdi4_i insn
(jump_insn:HI 61 222 155 8 (parallel [
(set (pc)
(if_then_else (eq (reg/v:DI 8 r8 [orig:169 diff ] [169])
(reg:DI 1 r1))
(label_ref:SI 82)
(pc)))
(clobber (scratch:SI))
(clobber (reg:SI 147 t))
]) 6 {cbranchdi4_i} (nil)
(expr_list:REG_BR_PROB (const_int 5000 [0x1388])
(nil)))
which is transformed to insns
(insn 232 235 233 9 (set (reg:SI 147 t)
(eq:SI (reg:SI 8 r8 [orig:169 diff ] [169])
(const_int 1 [0x1]))) 1 {cmpeqsi_t} (nil)
(nil))
(jump_insn 233 232 237 9 (set (pc)
(if_then_else (ne (reg:SI 147 t)
(const_int 0 [0x0]))
(label_ref 82)
(pc))) 207 {branch_true} (nil)
(expr_list:REG_BR_PROB (const_int 10000 [0x2710])
(nil)))
at .flow2. With the change of cbranchdi4_i insn_and_split like as
--- ORIG/trunk/gcc/config/sh/sh.md 2006-11-05 10:02:45.000000000 +0900
+++ LOCAL/trunk/gcc/config/sh/sh.md 2006-11-07 09:45:27.000000000 +0900
@@ -713,7 +713,7 @@
(define_insn_and_split "cbranchdi4_i"
[(set (pc)
(if_then_else (match_operator 0 "comparison_operator"
- [(match_operand:DI 1 "arith_operand" "r,r")
+ [(match_operand:DI 1 "arith_operand" "r,z")
(match_operand:DI 2 "arith_operand" "rN,i")])
(label_ref (match_operand 3 "" ""))
(pc)))
the reduced test case doesn't fail but the original ifcvt.c fails
with -O2:
../../TMP/trunk/gcc/ifcvt.c:1036: error: unable to find a register to spill in
class 'R0_REGS'
../../TMP/trunk/gcc/ifcvt.c:1036: error: this is the insn:
(jump_insn:HI 324 339 655 42 ../../TMP/trunk/gcc/ifcvt.c:977 (parallel [
(set (pc)
(if_then_else (eq (reg/v:DI 172 [ diff ])
(const_int 1 [0x1]))
(label_ref:SI 345)
(pc)))
(clobber (scratch:SI))
(clobber (reg:SI 147 t))
]) 6 {cbranchdi4_i} (nil)
(expr_list:REG_UNUSED (reg:SI 147 t)
(expr_list:REG_UNUSED (scratch:SI)
(expr_list:REG_BR_PROB (const_int 5000 [0x1388])
(nil)))))
../../TMP/trunk/gcc/ifcvt.c:1036: internal compiler error: in spill_failure, at
reload1.c:1938
--
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2006-11-07 2:32 [Bug target/29746] New: gcc fails to bootstrap on sh4-*-linux-gnu kkojima at gcc dot gnu dot org
2006-11-07 2:35 ` [Bug target/29746] " kkojima at gcc dot gnu dot org
2006-11-07 2:38 ` kkojima at gcc dot gnu dot org
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From: kkojima at gcc dot gnu dot org @ 2006-11-07 2:39 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from kkojima at gcc dot gnu dot org 2006-11-07 02:39 -------
Created an attachment (id=12558)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12558&action=view)
a reduced test case for the spill failure
--
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From: kkojima at gcc dot gnu dot org @ 2006-11-07 2:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from kkojima at gcc dot gnu dot org 2006-11-07 02:40 -------
If the comparison with a constant is removed from cbranchdi4_i,
the 2nd test case and the original ifcvt.c are compiled successfully.
--- ORIG/trunk/gcc/config/sh/sh.md 2006-11-05 10:02:45.000000000 +0900
+++ TMP/trunk/gcc/config/sh/sh.md 2006-11-07 09:34:22.000000000 +0900
@@ -713,11 +713,11 @@
(define_insn_and_split "cbranchdi4_i"
[(set (pc)
(if_then_else (match_operator 0 "comparison_operator"
- [(match_operand:DI 1 "arith_operand" "r,r")
- (match_operand:DI 2 "arith_operand" "rN,i")])
+ [(match_operand:DI 1 "arith_operand" "r")
+ (match_operand:DI 2 "arith_operand" "rN")])
(label_ref (match_operand 3 "" ""))
(pc)))
- (clobber (match_scratch:SI 4 "=X,&r"))
+ (clobber (match_scratch:SI 4 "=X"))
(clobber (reg:SI T_REG))]
"TARGET_CBRANCHDI4"
"#"
--
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From: kkojima at gcc dot gnu dot org @ 2006-11-07 2:47 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from kkojima at gcc dot gnu dot org 2006-11-07 02:46 -------
I'd like to add Joern to the list.
--
kkojima at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amylaar at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29746
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From: amylaar at gcc dot gnu dot org @ 2006-11-07 15:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from amylaar at gcc dot gnu dot org 2006-11-07 15:57 -------
Created an attachment (id=12563)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12563&action=view)
current patch for software floating point
In the framework of the software floating point patches, I make the early
emitting of cbranchdi as separate branches the default.
However, this patch set has still some issues - there are patches to generic
code,
and I also see ICE regressions for some of the tls tests on sh-elf.
--
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From: amylaar at gcc dot gnu dot org @ 2006-11-07 17:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from amylaar at gcc dot gnu dot org 2006-11-07 17:05 -------
Created an attachment (id=12564)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12564&action=view)
I have a new patch for sched-deps.c now.
--
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From: kkojima at gcc dot gnu dot org @ 2006-11-08 23:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from kkojima at gcc dot gnu dot org 2006-11-08 23:53 -------
I don't see ICEs for the tls tests on my sh-elf build with
your patches in #6 and #7. Does the new patch in #7 fix them?
I've confirmed that the trunk bootstraps successfully with
the patch in #4 and a one-liner to suppress a bogus compile
time warning. Should I send it to the list as a workaround
this PR?
--
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From: amylaar at gcc dot gnu dot org @ 2006-11-09 16:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from amylaar at gcc dot gnu dot org 2006-11-09 16:26 -------
Created an attachment (id=12576)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12576&action=view)
Amended sched-deps.c patch
It occurend to me that the previous patch would not do the right thing when
the set is above an existing SCHED_GROUP_P group, with at least one other
instruction intervening, while the use is below the group.
In that case, all the dependencies of the old SCHED_GROUP_P group need to
be transferred to the new group leader.
--
amylaar at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #12564|0 |1
is obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29746
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From: amylaar at gcc dot gnu dot org @ 2006-11-09 16:33 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from amylaar at gcc dot gnu dot org 2006-11-09 16:33 -------
(In reply to comment #8)
> I don't see ICEs for the tls tests on my sh-elf build with
> your patches in #6 and #7. Does the new patch in #7 fix them?
Yes, but I am still seeing these changes:
> FAIL: g++.dg/opt/reg-stack2.C (internal compiler error)
> FAIL: g++.dg/opt/reg-stack2.C (test for excess errors)
189a189,190
> FAIL: g++.dg/opt/reg-stack2.C (internal compiler error)
> FAIL: g++.dg/opt/reg-stack2.C (test for excess errors)
202d202
< FAIL: ext/pb_ds/regression/hash_data_map_rand.cc execution test
--
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From: amylaar at gcc dot gnu dot org @ 2006-11-09 17:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from amylaar at gcc dot gnu dot org 2006-11-09 17:28 -------
Created an attachment (id=12580)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12580&action=view)
current software floating point patch
I am testing this patch now.
--
amylaar at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #12563|0 |1
is obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29746
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From: amylaar at gcc dot gnu dot org @ 2006-11-09 17:38 UTC (permalink / raw)
To: gcc-bugs
------- Comment #12 from amylaar at gcc dot gnu dot org 2006-11-09 17:37 -------
(In reply to comment #8)
> I don't see ICEs for the tls tests on my sh-elf build with
> your patches in #6 and #7. Does the new patch in #7 fix them?
>
> I've confirmed that the trunk bootstraps successfully with
> the patch in #4 and a one-liner to suppress a bogus compile
> time warning. Should I send it to the list as a workaround
> this PR?
The problem looks like another instance of the scheduler bug.
Could you try the original cbranchdi_i pattern with the patch
from comment #9?
--
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From: kkojima at gcc dot gnu dot org @ 2006-11-09 22:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #13 from kkojima at gcc dot gnu dot org 2006-11-09 22:42 -------
I've tested the patch in #9 with the trunk (rev. 118619) and
got the same ICE in #2.
--
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From: amylaar at gcc dot gnu dot org @ 2006-11-10 15:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #14 from amylaar at gcc dot gnu dot org 2006-11-10 15:48 -------
Created an attachment (id=12587)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12587&action=view)
testsuite patch
This patch is needed additionally for the patch from #11.
--
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From: amylaar at gcc dot gnu dot org @ 2006-11-10 17:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #15 from amylaar at gcc dot gnu dot org 2006-11-10 17:26 -------
Created an attachment (id=12589)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12589&action=view)
current softfp patch
I've been able to reproduce the 'does not satisfy contraint' ICE using
-O2 xxx.i -w -mno-expand-cbranchdi -m2 .
I have amended expand_cbranchdi4 so that it properly uses the scratch register.
--
amylaar at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #12580|0 |1
is obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29746
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From: kkojima at gcc dot gnu dot org @ 2006-11-11 11:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #16 from kkojima at gcc dot gnu dot org 2006-11-11 11:08 -------
I'm testing the new softfp patch with bootstrap on sh4-unknown-linux-gnu.
It isn't finished yet but already passes the compilation of ifcvt.c
at stage2. No new failures on the regtest for x86 cross sh4-linux.
--
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From: patchapp at dberlin dot org @ 2007-01-07 0:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #17 from patchapp at dberlin dot org 2007-01-07 00:10 -------
Subject: Bug number PR target/29746
A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2007-01/msg00494.html
--
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From: kkojima at gcc dot gnu dot org @ 2007-02-06 23:12 UTC (permalink / raw)
To: gcc-bugs
------- Comment #18 from kkojima at gcc dot gnu dot org 2007-02-06 23:12 -------
Subject: Bug 29746
Author: kkojima
Date: Tue Feb 6 23:12:35 2007
New Revision: 121671
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=121671
Log:
PR target/29746
* config/sh/sh.c (expand_cbranchdi4): Use scratch register
properly.
(sh_initialize_trampoline): Add parentheses to avoid a warning.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.c
--
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From: kkojima at gcc dot gnu dot org @ 2007-02-06 23:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #19 from kkojima at gcc dot gnu dot org 2007-02-06 23:29 -------
Fixed.
--
kkojima at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29746
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