Author: yug
Date: 2012-04-27 03:39:48 -0400 (Fri, 27 Apr 2012)
New Revision: 3919
Modified:
trunk/osprey/be/opt/opt_prop.cxx
Log:
fix for bug963.
try copy propogation into variables inside ASM_INPUT. if the copy
source is a constant and the required constrait is "i".
Code Review: Lai Jian-Xin.
Modified: trunk/osprey/be/opt/opt_prop.cxx
===================================================================
--- trunk/osprey/be/opt/opt_prop.cxx 2012-04-27 07:37:16 UTC (rev 3918)
+++ trunk/osprey/be/opt/opt_prop.cxx 2012-04-27 07:39:48 UTC (rev 3919)
@@ -1511,6 +1511,14 @@
CODEREP *possible_prop = Copy_propagate_cr(x->Opnd(i), curbb,
inside_cse, in_array);
if (possible_prop && possible_prop->Kind() ==
x->Opnd(i)->Kind())
expr = possible_prop;
+ // open64.net bug963. If the Asm_input constraint is "i", i.e,
required immediate
+ // and the possible propagation is also a constant, we do this
propagation on demand.
+ else if (possible_prop &&
+ (possible_prop->Kind() == CK_CONST ||
+ possible_prop->Kind() == CK_RCONST) &&
+
!strncmp(ST_name(&St_Table[x->Asm_constraint()]),"i",1)) {
+ expr = possible_prop;
+ }
else {
x->Opnd(i)->Set_flag(CF_DONT_PROP);
expr = NULL;
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