[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, 91 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-const-01.ll b/test/CodeGen/SystemZ/int-const-01.ll
new file mode 100644
index 0000000000..a580154e6b
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-const-01.ll
@@ -0,0 +1,91 @@
+; Test loading of 32-bit constants.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check 0.
+define i32 @f1() {
+; CHECK: f1:
+; CHECK: lhi %r2, 0
+; CHECK: br %r14
+  ret i32 0
+}
+
+; Check the high end of the LHI range.
+define i32 @f2() {
+; CHECK: f2:
+; CHECK: lhi %r2, 32767
+; CHECK: br %r14
+  ret i32 32767
+}
+
+; Check the next value up, which must use LLILL instead.
+define i32 @f3() {
+; CHECK: f3:
+; CHECK: llill %r2, 32768
+; CHECK: br %r14
+  ret i32 32768
+}
+
+; Check the high end of the LLILL range.
+define i32 @f4() {
+; CHECK: f4:
+; CHECK: llill %r2, 65535
+; CHECK: br %r14
+  ret i32 65535
+}
+
+; Check the first useful LLILH value, which is the next one up.
+define i32 @f5() {
+; CHECK: f5:
+; CHECK: llilh %r2, 1
+; CHECK: br %r14
+  ret i32 65536
+}
+
+; Check the first useful IILF value, which is the next one up again.
+define i32 @f6() {
+; CHECK: f6:
+; CHECK: iilf %r2, 65537
+; CHECK: br %r14
+  ret i32 65537
+}
+
+; Check the high end of the LLILH range.
+define i32 @f7() {
+; CHECK: f7:
+; CHECK: llilh %r2, 65535
+; CHECK: br %r14
+  ret i32 -65536
+}
+
+; Check the next value up, which must use IILF.
+define i32 @f8() {
+; CHECK: f8:
+; CHECK: iilf %r2, 4294901761
+; CHECK: br %r14
+  ret i32 -65535
+}
+
+; Check the highest useful IILF value, 0xffff7fff
+define i32 @f9() {
+; CHECK: f9:
+; CHECK: iilf %r2, 4294934527
+; CHECK: br %r14
+  ret i32 -32769
+}
+
+; Check the next value up, which should use LHI.
+define i32 @f10() {
+; CHECK: f10:
+; CHECK: lhi %r2, -32768
+; CHECK: br %r14
+  ret i32 -32768
+}
+
+; Check -1.
+define i32 @f11() {
+; CHECK: f11:
+; CHECK: lhi %r2, -1
+; CHECK: br %r14
+  ret i32 -1
+}