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(force_const_mem): Set MARK instead of clearing it.

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(output_constant_pool): Only mark constant pool if -O.
Check mark flag unconditionally.
(mark_constant_pool): Start by clearing all mark flags.

From-SVN: r13564
This commit is contained in:
Richard Kenner 1997-01-29 16:12:37 -05:00
parent 69b7087e80
commit d2ce91694f
1 changed files with 7 additions and 3 deletions
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10
gcc/varasm.c
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@ -3486,7 +3486,7 @@ force_const_mem (mode, x)
pool->labelno = const_labelno;
pool->align = align;
pool->offset = pool_offset;
pool->mark = 0;
pool->mark = 1;
pool->next = 0;
if (last_pool == 0)
@ -3603,7 +3603,7 @@ output_constant_pool (fnname, fndecl)
/* It is possible for gcc to call force_const_mem and then to later
discard the instructions which refer to the constant. In such a
case we do not need to output the constant. */
if (flag_expensive_optimizations)
if (optimize >= 0 && flag_expensive_optimizations)
mark_constant_pool ();
#ifdef ASM_OUTPUT_POOL_PROLOGUE
@ -3614,7 +3614,7 @@ output_constant_pool (fnname, fndecl)
{
x = pool->constant;
if (flag_expensive_optimizations && ! pool->mark)
if (! pool->mark)
continue;
/* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF)
@ -3687,10 +3687,14 @@ static void
mark_constant_pool ()
{
register rtx insn;
struct pool_constant *pool;
if (first_pool == 0)
return;
for (pool = first_pool; pool; pool = pool->next)
pool->mark = 0;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
mark_constants (PATTERN (insn));