* flow.c (elim_reg_cond): Handle a comparison of a subreg.

From-SVN: r124122

1 files changed, 7 insertions, 1 deletions

diff --git a/gcc/flow.c b/gcc/flow.c
index 78c2328..5b0249b 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -3437,7 +3437,13 @@ elim_reg_cond (rtx x, unsigned int regno)
 
   if (COMPARISON_P (x))
     {
-      if (REGNO (XEXP (x, 0)) == regno)
+      rtx reg;
+
+      reg = XEXP (x, 0);
+      if (GET_CODE (reg) == SUBREG)
+	reg = SUBREG_REG (reg);
+      gcc_assert (REG_P (reg));
+      if (REGNO (reg) == regno)
 	return const0_rtx;
       return x;
     }