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COND_EXPR folding patch
- To: gcc-patches at gcc dot gnu dot org
- Subject: COND_EXPR folding patch
- From: Jason Merrill <jason at cygnus dot com>
- Date: Mon, 5 Jun 2000 20:01:05 -0400
Fixes g++.law/refs4.C; recent changes to strip cv-quals from non-class
rvalues in C++ caused us to wrap the MIN_EXPR in a NOP_EXPR, defeating
the unary_complex_lvalue transformation.
2000-06-05 Jason Merrill <jason@casey.soma.redhat.com>
* fold-const.c (fold, case COND_EXPR): Elide conversion between
cv-qualified versions of types.
Index: fold-const.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/fold-const.c,v
retrieving revision 1.120
diff -c -p -r1.120 fold-const.c
*** fold-const.c 2000/05/31 11:55:53 1.120
--- fold-const.c 2000/06/05 23:56:01
*************** fold (expr)
*** 6903,6908 ****
--- 6903,6912 ----
tree comp_op1 = TREE_OPERAND (arg0, 1);
tree comp_type = TREE_TYPE (comp_op0);
+ /* Avoid adding NOP_EXPRs in case this is an lvalue. */
+ if (TYPE_MAIN_VARIANT (comp_type) == TYPE_MAIN_VARIANT (type))
+ comp_type = type;
+
switch (comp_code)
{
case EQ_EXPR: