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| author | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-01-06 01:01:18 +0100 |
|---|---|---|
| committer | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2020-11-29 23:06:59 +0100 |
| commit | 701ce0cadbd5eb0655ab0c33de5c8a337a498a34 (patch) | |
| tree | 5e398f1e90946d6fd85c6dd8dc52587dd897df4a /memops.c | |
| parent | 540c2c4bf47f0c517c042ff689679b2900bb36a5 (diff) | |
| download | sparse-dev-701ce0cadbd5eb0655ab0c33de5c8a337a498a34.tar.gz | |
memops: kill dead loads before phi-node conversion
During load simplification it may happen that a load is unused
but if this fact is ignored and the usual conversion to a phi-node
is made, then this value may seem to be needed and can't anymore
be simplified away.
Fix this by removing dead loads during load simplification.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Diffstat (limited to 'memops.c')
| -rw-r--r-- | memops.c | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -111,6 +111,11 @@ static void simplify_loads(struct basic_block *bb) if (insn->is_volatile) continue; + if (!has_users(insn->target)) { + kill_instruction(insn); + continue; + } + RECURSE_PTR_REVERSE(insn, dom) { int dominance; if (!dom->bb) |