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* [Bug target/38350]  New: odd extra unused stack space/register allocated with asm
@ 2008-12-01 15:16 hp at gcc dot gnu dot org
  2008-12-01 15:21 ` [Bug target/38350] " hp at gcc dot gnu dot org
  2008-12-01 15:22 ` hp at gcc dot gnu dot org
  0 siblings, 2 replies; 3+ messages in thread
From: hp at gcc dot gnu dot org @ 2008-12-01 15:16 UTC (permalink / raw)
  To: gcc-bugs

For the attached code, there's no reason why the generated code at -O2 would
need an unused stack-slot (a second with -march=v10, a first with -march=v32)
when operand 5 (the last) of the asm is "g" than if it's "X".  Using "X" seems
a little awkward life-time-wise because the input is supposed to be valid.
I don't see this oddness on the host with native 4.1.2 on the host,
with/without -m32.


-- 
           Summary: odd extra unused stack space/register allocated with asm
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: target
        AssignedTo: hp at gcc dot gnu dot org
        ReportedBy: hp at gcc dot gnu dot org
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: cris-axis-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38350


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug target/38350] odd extra unused stack space/register allocated with asm
  2008-12-01 15:16 [Bug target/38350] New: odd extra unused stack space/register allocated with asm hp at gcc dot gnu dot org
@ 2008-12-01 15:21 ` hp at gcc dot gnu dot org
  2008-12-01 15:22 ` hp at gcc dot gnu dot org
  1 sibling, 0 replies; 3+ messages in thread
From: hp at gcc dot gnu dot org @ 2008-12-01 15:21 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from hp at gcc dot gnu dot org  2008-12-01 15:20 -------
Created an attachment (id=16801)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16801&action=view)
testcase

Change the last constraint from g to X and compile with 4.3-branch r142284 with
-O2 -march=v32 and -O2 -march=v10 to expose the oddness.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38350


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug target/38350] odd extra unused stack space/register allocated with asm
  2008-12-01 15:16 [Bug target/38350] New: odd extra unused stack space/register allocated with asm hp at gcc dot gnu dot org
  2008-12-01 15:21 ` [Bug target/38350] " hp at gcc dot gnu dot org
@ 2008-12-01 15:22 ` hp at gcc dot gnu dot org
  1 sibling, 0 replies; 3+ messages in thread
From: hp at gcc dot gnu dot org @ 2008-12-01 15:22 UTC (permalink / raw)
  To: gcc-bugs



-- 

hp at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-12-01 15:20:43
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38350


^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-12-01 15:22 UTC | newest]

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2008-12-01 15:16 [Bug target/38350] New: odd extra unused stack space/register allocated with asm hp at gcc dot gnu dot org
2008-12-01 15:21 ` [Bug target/38350] " hp at gcc dot gnu dot org
2008-12-01 15:22 ` hp at gcc dot gnu dot org

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