From d8a39b02e4c440e3694d9b42269c011221a728df Mon Sep 17 00:00:00 2001 From: Christoph Mallon Date: Fri, 3 Aug 2007 17:48:13 +0000 Subject: [PATCH] Do not deconv the right operand (shift count) of a Shl as it makes no sense. [r15465] --- ir/opt/convopt.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/ir/opt/convopt.c b/ir/opt/convopt.c index 3ee9687b8..f829095a8 100644 --- a/ir/opt/convopt.c +++ b/ir/opt/convopt.c @@ -142,7 +142,8 @@ int get_conv_costs(const ir_node *node, ir_mode *dest_mode) } costs = 0; - arity = get_irn_arity(node); + // The shift count does not participate in the conv optimisation + arity = is_Shl(node) ? 1 : get_irn_arity(node); for (i = 0; i < arity; ++i) { ir_node *pred = get_irn_n(node, i); costs += imin(get_conv_costs(pred, dest_mode), 1); @@ -192,7 +193,8 @@ ir_node *conv_transform(ir_node *node, ir_mode *dest_mode) return place_conv(node, dest_mode); } - arity = get_irn_arity(node); + // The shift count does not participate in the conv optimisation + arity = is_Shl(node) ? 1 : get_irn_arity(node); for (i = 0; i < arity; i++) { ir_node *pred = get_irn_n(node, i); ir_node *transformed; -- 2.20.1