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| author | Stephane Carrez <Stephane.Carrez@sun.com> | 2001-12-07 21:47:53 +0000 |
|---|---|---|
| committer | Stephane Carrez <ciceron@gcc.gnu.org> | 2001-12-07 22:47:53 +0100 |
| commit | 09ebda1bc45f8bd87d687cb9983e0d950b9f85c6 (patch) | |
| tree | 3f5e1439af92960fbddad0cc509d9fea26d40f46 /gcc/config | |
| parent | 595b6314cfd5cd08cabdcb3949bf7db369fa5d19 (diff) | |
| download | gcc-09ebda1bc45f8bd87d687cb9983e0d950b9f85c6.zip gcc-09ebda1bc45f8bd87d687cb9983e0d950b9f85c6.tar.gz gcc-09ebda1bc45f8bd87d687cb9983e0d950b9f85c6.tar.bz2 | |
sparc.c (epilogue_renumber): Do not replace %fp with %sp because it can cause the delayed instruction to...
* config/sparc/sparc.c (epilogue_renumber): Do not replace %fp
with %sp because it can cause the delayed instruction to load
below the stack.
From-SVN: r47772
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/sparc/sparc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index ec3aa0e..dec8b8c 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -5427,6 +5427,30 @@ epilogue_renumber (where, test) case CONST_DOUBLE: return 0; + /* Do not replace the frame pointer with the stack pointer because + it can cause the delayed instruction to load below the stack. + This occurs when instructions like: + + (set (reg/i:SI 24 %i0) + (mem/f:SI (plus:SI (reg/f:SI 30 %fp) + (const_int -20 [0xffffffec])) 0)) + + are in the return delayed slot. */ + case PLUS: + if (GET_CODE (XEXP (*where, 0)) == REG + && REGNO (XEXP (*where, 0)) == FRAME_POINTER_REGNUM + && (GET_CODE (XEXP (*where, 1)) != CONST_INT + || INTVAL (XEXP (*where, 1)) < SPARC_STACK_BIAS)) + return 1; + break; + + case MEM: + if (SPARC_STACK_BIAS + && GET_CODE (XEXP (*where, 0)) == REG + && REGNO (XEXP (*where, 0)) == FRAME_POINTER_REGNUM) + return 1; + break; + default: break; } |