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| author | James E Wilson <wilson@specifixinc.com> | 2003-12-20 02:39:43 +0000 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 2003-12-19 18:39:43 -0800 |
| commit | a06f01ba1e9b964c14ed6c63b56102d34ec6c45f (patch) | |
| tree | efcdb3a3200c268a6543afc46e842ac9d31ecbed /gcc | |
| parent | 020036b90ebb42cee83694d332800d98960f9e6b (diff) | |
| download | gcc-a06f01ba1e9b964c14ed6c63b56102d34ec6c45f.zip gcc-a06f01ba1e9b964c14ed6c63b56102d34ec6c45f.tar.gz gcc-a06f01ba1e9b964c14ed6c63b56102d34ec6c45f.tar.bz2 | |
Patch for asm clobber of fp.
* flow.c (mark_set_regs, case PARALLEL): Scan loop forwards.
Add case for ASM_OPERANDS.
* global.c (global_alloc): Set regs_ever_live for regs_asm_clobbered
registers.
From-SVN: r74869
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/flow.c | 8 | ||||
| -rw-r--r-- | gcc/global.c | 6 |
3 files changed, 20 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5528fd7..eea65d3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2003-12-19 James E Wilson <wilson@specifixinc.com> + + * flow.c (mark_set_regs, case PARALLEL): Scan loop forwards. + Add case for ASM_OPERANDS. + * global.c (global_alloc): Set regs_ever_live for regs_asm_clobbered + registers. + 2003-12-19 Kazu Hirata <kazu@cs.umass.edu> * expr.c (check_max_integer_computation_mode): Remove. @@ -2468,7 +2468,9 @@ mark_set_regs (struct propagate_block_info *pbi, rtx x, rtx insn) { int i; - for (i = XVECLEN (x, 0) - 1; i >= 0; i--) + /* We must scan forwards. If we have an asm, we need to set + the PROP_ASM_SCAN flag before scanning the clobbers. */ + for (i = 0; i < XVECLEN (x, 0); i++) { rtx sub = XVECEXP (x, 0, i); switch (code = GET_CODE (sub)) @@ -2495,6 +2497,10 @@ mark_set_regs (struct propagate_block_info *pbi, rtx x, rtx insn) mark_set_1 (pbi, code, SET_DEST (sub), cond, insn, flags); break; + case ASM_OPERANDS: + flags |= PROP_ASM_SCAN; + break; + default: break; } diff --git a/gcc/global.c b/gcc/global.c index d19e87e..de765b3 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -355,6 +355,8 @@ global_alloc (FILE *file) else if (cannot_elim) error ("%s cannot be used in asm here", reg_names[eliminables[i].from]); + else + regs_ever_live[eliminables[i].from] = 1; } #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM if (!regs_asm_clobbered[HARD_FRAME_POINTER_REGNUM]) @@ -366,6 +368,8 @@ global_alloc (FILE *file) else if (need_fp) error ("%s cannot be used in asm here", reg_names[HARD_FRAME_POINTER_REGNUM]); + else + regs_ever_live[HARD_FRAME_POINTER_REGNUM] = 1; #endif #else @@ -377,6 +381,8 @@ global_alloc (FILE *file) } else if (need_fp) error ("%s cannot be used in asm here", reg_names[FRAME_POINTER_REGNUM]); + else + regs_ever_live[FRAME_POINTER_REGNUM] = 1; #endif /* Track which registers have already been used. Start with registers |