[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.

llvm-svn: 181204

1 files changed, 71 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/SystemZ/insert-03.ll b/llvm/test/CodeGen/SystemZ/insert-03.ll
new file mode 100644
index 00000000000..261eabd1be7
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/insert-03.ll
@@ -0,0 +1,71 @@
+; Test insertions of 16-bit constants into one half of an i32.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the lowest useful IILL value.  (We use NILL rather than IILL
+; to clear 16 bits.)
+define i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK-NOT: ni
+; CHECK: iill %r2, 1
+; CHECK: br %r14
+  %and = and i32 %a, 4294901760
+  %or = or i32 %and, 1
+  ret i32 %or
+}
+
+; Check a middle value.
+define i32 @f2(i32 %a) {
+; CHECK: f2:
+; CHECK-NOT: ni
+; CHECK: iill %r2, 32769
+; CHECK: br %r14
+  %and = and i32 %a, -65536
+  %or = or i32 %and, 32769
+  ret i32 %or
+}
+
+; Check the highest useful IILL value.  (We use OILL rather than IILL
+; to set 16 bits.)
+define i32 @f3(i32 %a) {
+; CHECK: f3:
+; CHECK-NOT: ni
+; CHECK: iill %r2, 65534
+; CHECK: br %r14
+  %and = and i32 %a, 4294901760
+  %or = or i32 %and, 65534
+  ret i32 %or
+}
+
+; Check the lowest useful IILH value.
+define i32 @f4(i32 %a) {
+; CHECK: f4:
+; CHECK-NOT: ni
+; CHECK: iilh %r2, 1
+; CHECK: br %r14
+  %and = and i32 %a, 65535
+  %or = or i32 %and, 65536
+  ret i32 %or
+}
+
+; Check a middle value.
+define i32 @f5(i32 %a) {
+; CHECK: f5:
+; CHECK-NOT: ni
+; CHECK: iilh %r2, 32767
+; CHECK: br %r14
+  %and = and i32 %a, 65535
+  %or = or i32 %and, 2147418112
+  ret i32 %or
+}
+
+; Check the highest useful IILH value.
+define i32 @f6(i32 %a) {
+; CHECK: f6:
+; CHECK-NOT: ni
+; CHECK: iilh %r2, 65534
+; CHECK: br %r14
+  %and = and i32 %a, 65535
+  %or = or i32 %and, -131072
+  ret i32 %or
+}