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| author | Jan Hubicka <jh@suse.cz> | 2002-05-27 12:15:57 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2002-05-27 10:15:57 +0000 |
| commit | 5149f0701c126f74f3cccf53b14175374fe3a7e9 (patch) | |
| tree | da9f1e46251a76c45311b1d2ca5dc31b4bb913a9 /gcc/flow.c | |
| parent | c9715013ff4d33a50893e10339c32cb88185edea (diff) | |
| download | gcc-5149f0701c126f74f3cccf53b14175374fe3a7e9.tar.gz | |
basic-block.h (PEOP_SCAN_DEAD_STORES): New.
* basic-block.h (PEOP_SCAN_DEAD_STORES): New.
(PROP_FINAL): Include.
* flow.c (life_analysis, update_life_info,
init_propagate_block_info, mark_set_1, mark_used_rgs):
Support SCAN_DEAD_STORE.
From-SVN: r53920
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/gcc/flow.c b/gcc/flow.c index 1fb5a16eabb..4719dcce418 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -447,7 +447,7 @@ life_analysis (f, file, flags) flags &= ~(PROP_REG_INFO | PROP_AUTOINC); /* We want alias analysis information for local dead store elimination. */ - if (optimize && (flags & PROP_SCAN_DEAD_CODE)) + if (optimize && (flags & PROP_SCAN_DEAD_STORES)) init_alias_analysis (); /* Always remove no-op moves. Do this before other processing so @@ -477,7 +477,7 @@ life_analysis (f, file, flags) update_life_info (NULL, UPDATE_LIFE_GLOBAL, flags); /* Clean up. */ - if (optimize && (flags & PROP_SCAN_DEAD_CODE)) + if (optimize && (flags & PROP_SCAN_DEAD_STORES)) end_alias_analysis (); if (file) @@ -646,6 +646,7 @@ update_life_info (blocks, extent, prop_flags) calculate_global_regs_live (blocks, blocks, prop_flags & (PROP_SCAN_DEAD_CODE + | PROP_SCAN_DEAD_STORES | PROP_ALLOW_CFG_CHANGES)); if ((prop_flags & (PROP_KILL_DEAD_CODE | PROP_ALLOW_CFG_CHANGES)) @@ -659,6 +660,7 @@ update_life_info (blocks, extent, prop_flags) COPY_REG_SET (tmp, bb->global_live_at_end); changed |= propagate_block (bb, tmp, NULL, NULL, prop_flags & (PROP_SCAN_DEAD_CODE + | PROP_SCAN_DEAD_STORES | PROP_KILL_DEAD_CODE)); } @@ -667,7 +669,8 @@ update_life_info (blocks, extent, prop_flags) removing dead code can affect global register liveness, which is supposed to be finalized for this call after this loop. */ stabilized_prop_flags - &= ~(PROP_SCAN_DEAD_CODE | PROP_KILL_DEAD_CODE); + &= ~(PROP_SCAN_DEAD_CODE | PROP_SCAN_DEAD_STORES + | PROP_KILL_DEAD_CODE); if (! changed) break; @@ -1922,7 +1925,7 @@ init_propagate_block_info (bb, live, local_set, cond_local_set, flags) && ! (TREE_CODE (TREE_TYPE (current_function_decl)) == FUNCTION_TYPE && (TYPE_RETURNS_STACK_DEPRESSED (TREE_TYPE (current_function_decl)))) - && (flags & PROP_SCAN_DEAD_CODE) + && (flags & PROP_SCAN_DEAD_STORES) && (bb->succ == NULL || (bb->succ->succ_next == NULL && bb->succ->dest == EXIT_BLOCK_PTR @@ -2609,7 +2612,7 @@ 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 (optimize && (flags & PROP_SCAN_DEAD_CODE)) + if (optimize && (flags & PROP_SCAN_DEAD_STORES)) { if (GET_CODE (reg) == REG) invalidate_mems_from_set (pbi, reg); @@ -3712,7 +3715,7 @@ 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 (optimize && (flags & PROP_SCAN_DEAD_CODE)) + if (optimize && (flags & PROP_SCAN_DEAD_STORES)) { /* Invalidate the data for the last MEM stored, but only if MEM is something that can be stored into. */ |