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* [Bug target/14907] bogus sign/zero extension when relaying parameters with regparm
[not found] <bug-14907-1037@http.gcc.gnu.org/bugzilla/>
@ 2006-03-01 5:54 ` nmiell at comcast dot net
0 siblings, 0 replies; 3+ messages in thread
From: nmiell at comcast dot net @ 2006-03-01 5:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from nmiell at comcast dot net 2006-03-01 05:54 -------
This also occurs on AMD64 without any special attributes (the ABI passes params
in registers already).
When compiling:
extern char c2(char);
char c1(char c) { return c2(c); }
with gcc -Wall -O2 -S tail-char.c
using gcc (GCC) 4.0.2 20051125 (Red Hat 4.0.2-8)
The result is:
c1:
subq $8, %rsp
movsbl %dil,%edi
call c2
addq $8, %rsp
movsbl %al,%eax
ret
--
nmiell at comcast dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nmiell at comcast dot net
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14907
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/14907] bogus sign/zero extension when relaying parameters with regparm
2004-04-10 14:59 [Bug optimization/14907] New: " cesarb at nitnet dot com dot br
2004-04-10 15:48 ` [Bug target/14907] " pinskia at gcc dot gnu dot org
@ 2004-07-10 1:28 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-07-10 1:28 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-10 01:28 -------
Basically the problem is that the RTL optimizers do not know if they come in as full 32bit register even
though the ABI demands it.
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2004-04-10 15:31:46 |2004-07-10 01:28:55
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14907
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/14907] bogus sign/zero extension when relaying parameters with regparm
2004-04-10 14:59 [Bug optimization/14907] New: " cesarb at nitnet dot com dot br
@ 2004-04-10 15:48 ` pinskia at gcc dot gnu dot org
2004-07-10 1:28 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-10 15:48 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-10 15:31 -------
Confirmed. I think this is requied by the ABI to promote it but since it is already promoted it could just
use the full register, I do not know if this is really a bug but then again I could be wrong.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|optimization |target
Ever Confirmed| |1
Keywords| |pessimizes-code
Last reconfirmed|0000-00-00 00:00:00 |2004-04-10 15:31:46
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14907
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <bug-14907-1037@http.gcc.gnu.org/bugzilla/>
2006-03-01 5:54 ` [Bug target/14907] bogus sign/zero extension when relaying parameters with regparm nmiell at comcast dot net
2004-04-10 14:59 [Bug optimization/14907] New: " cesarb at nitnet dot com dot br
2004-04-10 15:48 ` [Bug target/14907] " pinskia at gcc dot gnu dot org
2004-07-10 1:28 ` pinskia at gcc dot gnu dot org
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