diff options
Diffstat (limited to 'gcc/config/sparc/sparc.c')
| -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 ec3aa0e86eb..dec8b8c9389 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; } |