[Patch, MIPS] Fix PR 58158 - ICE on MIPS Loongson

[Steve Ellcey]

While looking at the outstanding GCC regressions in bugzilla I noticed PR 58158
which has a proposed fix in the comments but which doesn't seem to have ever
been checked in.  I updated the change to apply to top-of-tree sources and
tested the specific test case but I don't have a Loongson system to do a
complete test run on.  The change seems very safe though and it should be OK
for R6 as well as Loongson since '!ISA_HAS_FP_CONDMOVE' is true for R6 so using
it instead of 'ISA_HAS_SEL' should be OK and more descriptive of why we want
to fail in this case.

OK to checkin?

Steve Ellcey
sell...@imgtec.com


2015-03-02  Steve Ellcey  <sell...@imgtec.com>

        PR target/58158
        * config/mips/mips.md (mov<mode>cc): Change ISA_HAS_SEL check to
        !ISA_HAS_FP_CONDMOVE.


diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index 2fb2786..3672c0b 100644
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -7150,7 +7150,8 @@
                          (match_operand:GPR 3 "reg_or_0_operand")))]
   "ISA_HAS_CONDMOVE || ISA_HAS_SEL"
 {
-  if (ISA_HAS_SEL && !INTEGRAL_MODE_P (GET_MODE (XEXP (operands[1], 0))))
+  if (!ISA_HAS_FP_CONDMOVE
+      && !INTEGRAL_MODE_P (GET_MODE (XEXP (operands[1], 0))))
     FAIL;
 
   mips_expand_conditional_move (operands);