[SystemZ] Add CodeGen test cases

This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 40 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/xor-02.ll b/test/CodeGen/SystemZ/xor-02.ll
new file mode 100644
index 0000000000..c2b52b9b8e
--- /dev/null
+++ b/test/CodeGen/SystemZ/xor-02.ll
@@ -0,0 +1,40 @@
+; Test 32-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 i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK: xilf %r2, 1
+; CHECK: br %r14
+  %xor = xor i32 %a, 1
+  ret i32 %xor
+}
+
+; Check the high end of the signed range.
+define i32 @f2(i32 %a) {
+; CHECK: f2:
+; CHECK: xilf %r2, 2147483647
+; CHECK: br %r14
+  %xor = xor i32 %a, 2147483647
+  ret i32 %xor
+}
+
+; Check the low end of the signed range, which should be treated
+; as a positive value.
+define i32 @f3(i32 %a) {
+; CHECK: f3:
+; CHECK: xilf %r2, 2147483648
+; CHECK: br %r14
+  %xor = xor i32 %a, -2147483648
+  ret i32 %xor
+}
+
+; Check the high end of the XILF range.
+define i32 @f4(i32 %a) {
+; CHECK: f4:
+; CHECK: xilf %r2, 4294967295
+; CHECK: br %r14
+  %xor = xor i32 %a, 4294967295
+  ret i32 %xor
+}