From: Sebastian Buchwald <Sebastian.Buchwald@kit.edu>
Date: Wed, 11 Feb 2009 13:47:03 +0000 (+0000)
Subject: PBQP transformer doesn't support Mux nodes with constant values (see r25205).
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=21d88871cd3a4d5773495a264d1455520fbfab9a;p=libfirm

PBQP transformer doesn't support Mux nodes with constant values (see r25205).

[r25479]
---

diff --git a/ir/be/ia32/bearch_ia32.c b/ir/be/ia32/bearch_ia32.c
index d2f4c77af..a85bd9090 100644
--- a/ir/be/ia32/bearch_ia32.c
+++ b/ir/be/ia32/bearch_ia32.c
@@ -2227,8 +2227,21 @@ static int ia32_is_mux_allowed(ir_node *sel, ir_node *phi_list, int i, int j)
 					ir_node *f = get_Phi_pred(phi, j);
 
 					/* always support Mux(!float, C1, C2) */
-					if (is_Const(t) && is_Const(f) && !mode_is_float(get_irn_mode(cl)))
-						continue;
+					if (is_Const(t) && is_Const(f) && !mode_is_float(get_irn_mode(cl))) {
+						switch (be_transformer) {
+						case TRANSFORMER_DEFAULT:
+							/* always support Mux(!float, C1, C2) */
+							continue;
+#ifdef FIRM_GRGEN_BE
+						case TRANSFORMER_PBQP:
+						case TRANSFORMER_RAND:
+							/* no support for Mux(*, C1, C2) */
+							return 0;
+#endif
+						default:
+							panic("invalid transformer");
+						}
+					}
 					/* only abs or nabs supported */
 					if (! psi_is_Abs_or_Nabs(cmp, sel, t, f))
 						return 0;