From: Manuel Mohr <manuel.mohr@kit.edu>
Date: Mon, 19 Sep 2011 09:30:34 +0000 (+0200)
Subject: Turn off CSE when creating Projs during double word lowering.
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=35510bc1cea86ecdfc3299ea2d0d709714cc3e96;p=libfirm

Turn off CSE when creating Projs during double word lowering.
---

diff --git a/ir/lower/lower_dw.c b/ir/lower/lower_dw.c
index 7dc325402..0f54d3969 100644
--- a/ir/lower/lower_dw.c
+++ b/ir/lower/lower_dw.c
@@ -1918,6 +1918,7 @@ static void lower_Start(ir_node *node, ir_mode *high_mode)
 		ir_mode *mode_h;
 		ir_node *res_low;
 		ir_node *res_high;
+		int      old_cse;
 		dbg_info *dbg;
 
 		if (!is_Proj(proj))
@@ -1935,6 +1936,9 @@ static void lower_Start(ir_node *node, ir_mode *high_mode)
 			continue;
 		}
 
+		/* Switch off CSE or we might get an already existing Proj. */
+		old_cse = get_opt_cse();
+		set_opt_cse(0);
 		dbg = get_irn_dbg_info(proj);
 		if (env->params->little_endian) {
 			res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr]);
@@ -1943,6 +1947,7 @@ static void lower_Start(ir_node *node, ir_mode *high_mode)
 			res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr]);
 			res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr] + 1);
 		}
+		set_opt_cse(old_cse);
 		ir_set_dw_lowered(proj, res_low, res_high);
 	}
 }