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| author |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-11-30 18:27:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-07 21:05:18 -0700 |
| commit | 3f7c3bf7a3ce7641d695b70dd94ebe8e1470652d (patch) | |
| tree | 02740624dfdaaab58d25fee5f4f457203e9a5c3a /simplify.c | |
| parent | Simplify "setcc + select $0<->$1" into "setne/seteq". (diff) | |
| download | sparse-3f7c3bf7a3ce7641d695b70dd94ebe8e1470652d.tar.gz sparse-3f7c3bf7a3ce7641d695b70dd94ebe8e1470652d.tar.bz2 sparse-3f7c3bf7a3ce7641d695b70dd94ebe8e1470652d.zip | |
Don't try to share parenthood fn between phi node removal and
regular CSE.
The CSE case is totally different: since both children use the same
pseudos, there can be no question that a common parent wouldn't
have that pseudo live.
Diffstat (limited to 'simplify.c')
| -rw-r--r-- | simplify.c | 14 |
1 files changed, 2 insertions, 12 deletions
@@ -25,16 +25,6 @@ static struct basic_block *phi_parent(struct basic_block *source, pseudo_t pseud return first_basic_block(source->parents); } -struct basic_block *trivial_common_parent(struct basic_block *s1, pseudo_t p1, - struct basic_block *s2, pseudo_t p2) -{ - s1 = phi_parent(s1, p1); - s2 = phi_parent(s2, p2); - if (s1 != s2) - s1 = NULL; - return s1; -} - static void clear_phi(struct instruction *insn) { pseudo_t phi; @@ -71,8 +61,8 @@ static int if_convert_phi(struct instruction *insn) /* * See if we can find a common source for this.. */ - source = trivial_common_parent(bb1, p1, bb2, p2); - if (!source) + source = phi_parent(bb1, p1); + if (source != phi_parent(bb2, p2)) return 0; /* |