[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
diff --git a/llvm/test/CodeGen/SystemZ/insert-03.ll b/llvm/test/CodeGen/SystemZ/insert-03.ll
new file mode 100644
index 0000000..261eabd
--- /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
+}