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Fix for x86 FP problem.

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* reg-stack.c: Revert last patch (Apr 20).
	(convert_regs): Set insn to PREV_INSN (next) after do while loop.

From-SVN: r19437
This commit is contained in:
Jim Wilson 1998-04-27 19:24:06 +00:00 committed by Jim Wilson
parent 1688d6d2c7
commit 561cf7b130
2 changed files with 28 additions and 23 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
Mon Apr 27 18:36:28 1998 Jim Wilson <wilson@cygnus.com>
* reg-stack.c: Revert last patch (Apr 20).
(convert_regs): Set insn to PREV_INSN (next) after do while loop.
* m68k/lb1sf68.asm (Laddsf$3): Fix typos in mcf5200 exg code.
* loop.c (check_dbra_loop): New locals jump, first_compare, and

48
gcc/reg-stack.c
View File

@ -262,9 +262,9 @@ static void move_for_stack_reg PROTO((rtx, stack, rtx));
static void swap_rtx_condition PROTO((rtx));
static void compare_for_stack_reg PROTO((rtx, stack, rtx));
static void subst_stack_regs_pat PROTO((rtx, stack, rtx));
static rtx subst_asm_stack_regs PROTO((rtx, stack, rtx *, rtx **,
static void subst_asm_stack_regs PROTO((rtx, stack, rtx *, rtx **,
char **, int, int));
static rtx subst_stack_regs PROTO((rtx, stack));
static void subst_stack_regs PROTO((rtx, stack));
static void change_stack PROTO((rtx, stack, stack, rtx (*) ()));
static void goto_block_pat PROTO((rtx, stack, rtx));
@ -2411,11 +2411,9 @@ subst_stack_regs_pat (insn, regstack, pat)
stack-like regs in asm statements. These rules are enforced by
record_asm_stack_regs; see comments there for details. Any
asm_operands left in the RTL at this point may be assume to meet the
requirements, since record_asm_stack_regs removes any problem asm.
requirements, since record_asm_stack_regs removes any problem asm. */
It returns the last new insn generated by this function. */
static rtx
static void
subst_asm_stack_regs (insn, regstack, operands, operands_loc, constraints,
n_inputs, n_outputs)
rtx insn;
@ -2694,18 +2692,14 @@ subst_asm_stack_regs (insn, regstack, operands, operands_loc, constraints,
break;
}
}
return insn;
}
/* Substitute stack hard reg numbers for stack virtual registers in
INSN. Non-stack register numbers are not changed. REGSTACK is the
current stack content. Insns may be emitted as needed to arrange the
stack for the 387 based on the contents of the insn.
stack for the 387 based on the contents of the insn. */
It returns the last new insn generated by this function. */
static rtx
static void
subst_stack_regs (insn, regstack)
rtx insn;
stack regstack;
@ -2761,9 +2755,9 @@ subst_stack_regs (insn, regstack)
decode_asm_operands (body, operands, operands_loc,
constraints, NULL_PTR);
get_asm_operand_lengths (body, n_operands, &n_inputs, &n_outputs);
return subst_asm_stack_regs (insn, regstack, operands,
operands_loc, constraints,
n_inputs, n_outputs);
subst_asm_stack_regs (insn, regstack, operands, operands_loc,
constraints, n_inputs, n_outputs);
return;
}
if (GET_CODE (PATTERN (insn)) == PARALLEL)
@ -2781,7 +2775,7 @@ subst_stack_regs (insn, regstack)
REG_UNUSED will already have been dealt with, so just return. */
if (GET_CODE (insn) == NOTE)
return insn;
return;
/* If there is a REG_UNUSED note on a stack register on this insn,
the indicated reg must be popped. The REG_UNUSED note is removed,
@ -2797,8 +2791,6 @@ subst_stack_regs (insn, regstack)
}
else
note_link = &XEXP (note, 1);
return insn;
}
/* Change the organization of the stack so that it fits a new basic
@ -3039,7 +3031,7 @@ static void
convert_regs ()
{
register int block, reg;
register rtx insn, next, new;
register rtx insn, next;
struct stack_def regstack;
for (block = 0; block < blocks; block++)
@ -3065,7 +3057,6 @@ convert_regs ()
do
{
insn = next;
new = insn;
next = NEXT_INSN (insn);
/* Don't bother processing unless there is a stack reg
@ -3073,10 +3064,21 @@ convert_regs ()
floating point values). */
if (GET_MODE (insn) == QImode || GET_CODE (insn) == CALL_INSN)
/* We may have generated some new instructions here. */
new = subst_stack_regs (insn, &regstack);
subst_stack_regs (insn, &regstack);
} while (insn != block_end[block]);
/* For all further actions, INSN needs to be the last insn in
this basic block. If subst_stack_regs inserted additional
instructions after INSN, it is no longer the last one at
this point. */
next = PREV_INSN (next);
/* If subst_stack_regs inserted something after a JUMP_INSN, that
is almost certainly a bug. */
if (GET_CODE (insn) == JUMP_INSN && insn != next)
abort ();
insn = next;
/* Something failed if the stack life doesn't match. */
@ -3097,7 +3099,7 @@ convert_regs ()
/* Likewise handle the case where we fall into the next block. */
if ((block < blocks - 1) && block_drops_in[block+1])
change_stack (new, &regstack, &block_stack_in[block+1],
change_stack (insn, &regstack, &block_stack_in[block+1],
emit_insn_after);
}