Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/CodeGen/SystemZ/xor-04.ll

@@ -0,0 +1,69 @@
+; Test 64-bit XORs in which the second operand is constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the lowest useful XILF value.
+define i64 @f1(i64 %a) {
+; CHECK-LABEL: f1:
+; CHECK: xilf %r2, 1
+; CHECK: br %r14
+  %xor = xor i64 %a, 1
+  ret i64 %xor
+}
+
+; Check the high end of the XILF range.
+define i64 @f2(i64 %a) {
+; CHECK-LABEL: f2:
+; CHECK: xilf %r2, 4294967295
+; CHECK: br %r14
+  %xor = xor i64 %a, 4294967295
+  ret i64 %xor
+}
+
+; Check the lowest useful XIHF value, which is one up from the above.
+define i64 @f3(i64 %a) {
+; CHECK-LABEL: f3:
+; CHECK: xihf %r2, 1
+; CHECK: br %r14
+  %xor = xor i64 %a, 4294967296
+  ret i64 %xor
+}
+
+; Check the next value up again, which needs a combination of XIHF and XILF.
+define i64 @f4(i64 %a) {
+; CHECK-LABEL: f4:
+; CHECK: xihf %r2, 1
+; CHECK: xilf %r2, 4294967295
+; CHECK: br %r14
+  %xor = xor i64 %a, 8589934591
+  ret i64 %xor
+}
+
+; Check the high end of the XIHF range.
+define i64 @f5(i64 %a) {
+; CHECK-LABEL: f5:
+; CHECK: xihf %r2, 4294967295
+; CHECK: br %r14
+  %xor = xor i64 %a, -4294967296
+  ret i64 %xor
+}
+
+; Check the next value up, which again must use XIHF and XILF.
+define i64 @f6(i64 %a) {
+; CHECK-LABEL: f6:
+; CHECK: xihf %r2, 4294967295
+; CHECK: xilf %r2, 1
+; CHECK: br %r14
+  %xor = xor i64 %a, -4294967295
+  ret i64 %xor
+}
+
+; Check full bitwise negation
+define i64 @f7(i64 %a) {
+; CHECK-LABEL: f7:
+; CHECK: xihf %r2, 4294967295
+; CHECK: xilf %r2, 4294967295
+; CHECK: br %r14
+  %xor = xor i64 %a, -1
+  ret i64 %xor
+}