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fix target/6922
- From: Richard Henderson <rth at redhat dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 17 Jun 2002 14:20:14 -0700
- Subject: fix target/6922
RTL incoming to loop has
(mult:DI (sign_extend:DI (reg:SI))
(sign_extend:DI (reg:SI)))
which is not handled by expand_mult_add. We wind up trying
to copy (sign_extend:DI (reg:SI)) directly into a register,
which we can't do in Sparc 32-bit mode.
It'd be nice if we handled this some other way. We've just
replaced a 32->64 bit widening multiply with a 64-bit multiply.
I couldn't think of anything though. At least this does the
right thing without ICEing.
Tested sparc-solaris2.8; applied mainline and branch.
r~
* expmed.c (make_tree): Handle SIGN_EXTEND/ZERO_EXTEND.
Index: expmed.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/expmed.c,v
retrieving revision 1.108.2.3
diff -c -p -d -r1.108.2.3 expmed.c
*** expmed.c 13 Mar 2002 02:05:27 -0000 1.108.2.3
--- expmed.c 17 Jun 2002 18:04:10 -0000
*************** make_tree (type, x)
*** 4136,4141 ****
--- 4136,4147 ----
build (TRUNC_DIV_EXPR, t,
make_tree (t, XEXP (x, 0)),
make_tree (t, XEXP (x, 1)))));
+
+ case SIGN_EXTEND:
+ case ZERO_EXTEND:
+ t = type_for_mode (GET_MODE (XEXP (x, 0)), GET_CODE (x) == ZERO_EXTEND);
+ return fold (convert (type, make_tree (t, XEXP (x, 0))));
+
default:
t = make_node (RTL_EXPR);
TREE_TYPE (t) = type;