@@ -2260,7 +2260,7 @@ simplify_binary_operation_1 (enum rtx_co
break;
case IOR:
- if (trueop1 == const0_rtx)
+ if (trueop1 == CONST0_RTX (mode))
return op0;
if (CONST_INT_P (trueop1)
&& ((INTVAL (trueop1) & GET_MODE_MASK (mode))
@@ -2402,7 +2402,7 @@ simplify_binary_operation_1 (enum rtx_co
break;
case XOR:
- if (trueop1 == const0_rtx)
+ if (trueop1 == CONST0_RTX (mode))
return op0;
if (CONST_INT_P (trueop1)
&& ((INTVAL (trueop1) & GET_MODE_MASK (mode))
@@ -0,0 +1,24 @@
+/* PR rtl-optimization/45739 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2" } */
+
+#include <emmintrin.h>
+
+__m128i var;
+
+void
+foo (void)
+{
+ __m128i zero = _mm_setzero_si128 ();
+ var = _mm_xor_si128 (zero, var);
+}
+
+void
+bar (void)
+{
+ __m128i zero = _mm_setzero_si128 ();
+ var = _mm_or_si128 (var, zero);
+}
+
+/* { dg-final { scan-assembler-not "pxor" } } */
+/* { dg-final { scan-assembler-not "por" } } */