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* [Bug target/46721] New: Unnecessary stack instructions are generated for SPU when returning a struct
@ 2010-11-30 12:08 jadamcze at utas dot edu.au
2010-11-30 13:49 ` [Bug target/46721] " rguenth at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: jadamcze at utas dot edu.au @ 2010-11-30 12:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46721
Summary: Unnecessary stack instructions are generated for SPU
when returning a struct
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jadamcze@utas.edu.au
$ cat return.c
#include <spu_intrinsics.h>
struct s { qword qs; };
struct s f(qword i) {
return (struct s){i};
}
$ spu-elf-gcc return.c -std=c99 -c -S -o- -O3
.file "return.c"
.text
.align 3
.global f
.type f, @function
f:
stqd $sp,-48($sp)
ai $sp,$sp,-48
ai $sp,$sp,48
bi $lr
.size f, .-f
.ident "GCC: (Gentoo 4.5.1-r1 p1.3, pie-0.4.5) 4.5.1"
The three instructions referencing $sp are all redundant and should not be
generated. These appear to be generated whenever a function returns a struct.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug target/46721] Unnecessary stack instructions are generated for SPU when returning a struct
2010-11-30 12:08 [Bug target/46721] New: Unnecessary stack instructions are generated for SPU when returning a struct jadamcze at utas dot edu.au
@ 2010-11-30 13:49 ` rguenth at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-11-30 13:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46721
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-11-30 12:08 [Bug target/46721] New: Unnecessary stack instructions are generated for SPU when returning a struct jadamcze at utas dot edu.au
2010-11-30 13:49 ` [Bug target/46721] " rguenth at gcc dot gnu.org
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