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flow.c (life_analysis): Only turn off PROP_LOG_LINKS and PROP_AUTOINC at -O0.

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* flow.c (life_analysis): Only turn off PROP_LOG_LINKS and
        PROP_AUTOINC at -O0.  Don't collect alias info at -O0.
        (init_propagate_block_info): Don't kill memory stores at -O0.
        (mark_set_1, mark_used_regs): Likewise.

From-SVN: r35571
This commit is contained in:
Richard Henderson 2000-08-08 12:46:51 -07:00 committed by Richard Henderson
parent e2c953b6dd
commit b2262f4a2c
2 changed files with 14 additions and 6 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2000-08-08 Richard Henderson <rth@cygnus.com>
* flow.c (life_analysis): Only turn off PROP_LOG_LINKS and
PROP_AUTOINC at -O0. Don't collect alias info at -O0.
(init_propagate_block_info): Don't kill memory stores at -O0.
(mark_set_1, mark_used_regs): Likewise.
2000-08-08 David Edelsohn <edelsohn@gnu.org>
* rs6000.c (optimization_options): Decorate 'level' as

13
gcc/flow.c
View File

@ -2630,7 +2630,7 @@ life_analysis (f, file, flags)
#endif
if (! optimize)
flags &= PROP_DEATH_NOTES | PROP_REG_INFO;
flags &= ~(PROP_LOG_LINKS | PROP_AUTOINC);
/* The post-reload life analysis have (on a global basis) the same
registers live as was computed by reload itself. elimination
@ -2646,7 +2646,7 @@ life_analysis (f, file, flags)
flags &= ~(PROP_REG_INFO | PROP_AUTOINC);
/* We want alias analysis information for local dead store elimination. */
if (flags & PROP_SCAN_DEAD_CODE)
if (optimize && (flags & PROP_SCAN_DEAD_CODE))
init_alias_analysis ();
/* Always remove no-op moves. Do this before other processing so
@ -2676,7 +2676,7 @@ life_analysis (f, file, flags)
update_life_info (NULL, UPDATE_LIFE_GLOBAL, flags);
/* Clean up. */
if (flags & PROP_SCAN_DEAD_CODE)
if (optimize && (flags & PROP_SCAN_DEAD_CODE))
end_alias_analysis ();
if (file)
@ -3756,7 +3756,8 @@ init_propagate_block_info (bb, live, local_set, flags)
used later in the block are dead. So make a pass over the block
recording any such that are made and show them dead at the end. We do
a very conservative and simple job here. */
if ((flags & PROP_SCAN_DEAD_CODE)
if (optimize
&& (flags & PROP_SCAN_DEAD_CODE)
&& (bb->succ == NULL
|| (bb->succ->succ_next == NULL
&& bb->succ->dest == EXIT_BLOCK_PTR)))
@ -4346,7 +4347,7 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
/* If this set is a MEM, then it kills any aliased writes.
If this set is a REG, then it kills any MEMs which use the reg. */
if (flags & PROP_SCAN_DEAD_CODE)
if (optimize && (flags & PROP_SCAN_DEAD_CODE))
{
if (GET_CODE (reg) == MEM || GET_CODE (reg) == REG)
{
@ -5321,7 +5322,7 @@ mark_used_regs (pbi, x, cond, insn)
case MEM:
/* Don't bother watching stores to mems if this is not the
final pass. We'll not be deleting dead stores this round. */
if (flags & PROP_SCAN_DEAD_CODE)
if (optimize && (flags & PROP_SCAN_DEAD_CODE))
{
/* Invalidate the data for the last MEM stored, but only if MEM is
something that can be stored into. */