1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/cse.c b/gcc/cse.c
index c39ab9f..7a13a7b 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -5802,7 +5802,14 @@ fold_rtx (x, insn)
 	     hence not save anything) or be incorrect.  */
 	  if (const_arg1 != 0 && GET_CODE (const_arg1) == CONST_INT
 	      && INTVAL (const_arg1) < 0
-	      && - INTVAL (const_arg1) >= 0
+	      /* This used to test
+
+	         - INTVAL (const_arg1) >= 0
+
+		 But The Sun V5.0 compilers mis-compiled that test.  So
+		 instead we test for the problematic value in a more direct
+		 manner and hope the Sun compilers get it correct.  */
+	      && INTVAL (const_arg1) != (1 << (HOST_BITS_PER_WIDE_INT - 1))
 	      && GET_CODE (folded_arg1) == REG)
 	    {
 	      rtx new_const = GEN_INT (- INTVAL (const_arg1));