* Fwd: C6X fails to build in FSF mainline
[not found] <m3zkj9o8o3.fsf@redhat.com>
@ 2011-08-18 1:46 ` Andrew Pinski
2011-08-18 15:16 ` Richard Henderson
2011-08-22 18:04 ` Bernd Schmidt
0 siblings, 2 replies; 4+ messages in thread
From: Andrew Pinski @ 2011-08-18 1:46 UTC (permalink / raw)
To: GCC Mailing List; +Cc: Richard Henderson
Forwarding this to the gcc list. Also Adding RTH to the CC since he
helped Bernd to get the dwarf2 parts working correctly.
---------- Forwarded message ----------
From: Nick Clifton <nickc@redhat.com>
Date: Tue, Aug 16, 2011 at 5:14 AM
Subject: C6X fails to build in FSF mainline
To: bernds@codesourcery.com
Cc: gcc-bugs@gcc.gnu.org
Hi Bernd,
You probably know this already. The c6x-elf target fails to build
libgcc with the current FSF mainline sources:
gcc/libgcc2.c: In function ‘__gnu_mulsc3’:
gcc/libgcc2.c:1928:1: internal compiler error: in scan_trace, at
dwarf2cfi.c:2433
Please submit a full bug report,
I assume that it is because the C6X has more than one delay slot ?
Cheers
Nick
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Fwd: C6X fails to build in FSF mainline
2011-08-18 1:46 ` Fwd: C6X fails to build in FSF mainline Andrew Pinski
@ 2011-08-18 15:16 ` Richard Henderson
2011-08-18 17:16 ` Richard Henderson
2011-08-22 18:04 ` Bernd Schmidt
1 sibling, 1 reply; 4+ messages in thread
From: Richard Henderson @ 2011-08-18 15:16 UTC (permalink / raw)
To: Andrew Pinski; +Cc: GCC Mailing List
On 08/17/2011 06:45 PM, Andrew Pinski wrote:
> gcc/libgcc2.c: In function â__gnu_mulsc3â:
> gcc/libgcc2.c:1928:1: internal compiler error: in scan_trace, at
> dwarf2cfi.c:2433
> Please submit a full bug report,
>
> I assume that it is because the C6X has more than one delay slot ?
Ug. I knew c6x has more than 1 delay slot (indeed, 5).
But I'd hoped that they were not annulled.
r~
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Fwd: C6X fails to build in FSF mainline
2011-08-18 15:16 ` Richard Henderson
@ 2011-08-18 17:16 ` Richard Henderson
0 siblings, 0 replies; 4+ messages in thread
From: Richard Henderson @ 2011-08-18 17:16 UTC (permalink / raw)
To: Andrew Pinski; +Cc: GCC Mailing List
On 08/18/2011 08:16 AM, Richard Henderson wrote:
> On 08/17/2011 06:45 PM, Andrew Pinski wrote:
>> gcc/libgcc2.c: In function â__gnu_mulsc3â:
>> gcc/libgcc2.c:1928:1: internal compiler error: in scan_trace, at
>> dwarf2cfi.c:2433
>> Please submit a full bug report,
>>
>> I assume that it is because the C6X has more than one delay slot ?
>
> Ug. I knew c6x has more than 1 delay slot (indeed, 5).
> But I'd hoped that they were not annulled.
... and it doesn't. The problem is that RTL_CONST_CALL_P
and INSN_ANNULLED_BRANCH_P use the same bit. Sigh.
r~
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Fwd: C6X fails to build in FSF mainline
2011-08-18 1:46 ` Fwd: C6X fails to build in FSF mainline Andrew Pinski
2011-08-18 15:16 ` Richard Henderson
@ 2011-08-22 18:04 ` Bernd Schmidt
1 sibling, 0 replies; 4+ messages in thread
From: Bernd Schmidt @ 2011-08-22 18:04 UTC (permalink / raw)
To: Andrew Pinski; +Cc: GCC Mailing List, Richard Henderson
[-- Attachment #1: Type: text/plain, Size: 882 bytes --]
On 08/18/11 03:45, Andrew Pinski wrote:
> Forwarding this to the gcc list. Also Adding RTH to the CC since he
> helped Bernd to get the dwarf2 parts working correctly.
> You probably know this already. The c6x-elf target fails to build
> libgcc with the current FSF mainline sources:
>
> gcc/libgcc2.c: In function â__gnu_mulsc3â:
> gcc/libgcc2.c:1928:1: internal compiler error: in scan_trace, at
> dwarf2cfi.c:2433
> Please submit a full bug report,
Thanks Richard for fixing this (I've been on vacation).
There are some testsuite failures at -O3 in another part of dwarf2cfi,
which are caused by computed_jump_p returning 0 for the
indirect_jump_shadow pattern. There isn't really a sensible way to
represent this pattern in RTL, but we can take advantage of the fact
that computed_jump_p returns true for constants. I committed the
following patch.
Bernd
[-- Attachment #2: compjmp.diff --]
[-- Type: text/plain, Size: 1047 bytes --]
Index: gcc/ChangeLog
===================================================================
--- gcc/ChangeLog (revision 177967)
+++ gcc/ChangeLog (working copy)
@@ -1,3 +1,8 @@
+2011-08-22 Bernd Schmidt <bernds@codesourcery.com>
+
+ * config/c6x/c6x.md (indirect_jump_shadow): Tweak representation
+ to make computed_jump_p return true.
+
2011-08-22 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* configure.ac (GCC_PICFLAG_FOR_TARGET): Call it.
Index: gcc/config/c6x/c6x.md
===================================================================
--- gcc/config/c6x/c6x.md (revision 177952)
+++ gcc/config/c6x/c6x.md (working copy)
@@ -1427,8 +1427,10 @@ (define_insn "real_ret"
(set_attr "cross" "y,n")
(set_attr "dest_regfile" "b")])
+;; computed_jump_p returns true if it finds a constant; so use one in the
+;; unspec.
(define_insn "indirect_jump_shadow"
- [(set (pc) (unspec [(pc)] UNSPEC_JUMP_SHADOW))]
+ [(set (pc) (unspec [(const_int 1)] UNSPEC_JUMP_SHADOW))]
""
";; indirect jump occurs"
[(set_attr "type" "shadow")])
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2011-08-18 1:46 ` Fwd: C6X fails to build in FSF mainline Andrew Pinski
2011-08-18 15:16 ` Richard Henderson
2011-08-18 17:16 ` Richard Henderson
2011-08-22 18:04 ` Bernd Schmidt
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