[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, 93 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/and-02.ll b/test/CodeGen/SystemZ/and-02.ll
new file mode 100644
index 0000000000..a0fff81492
--- /dev/null
+++ b/test/CodeGen/SystemZ/and-02.ll
@@ -0,0 +1,93 @@
+; Test 32-bit ANDs in which the second operand is constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the lowest useful NILF value.
+define i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK: nilf %r2, 1
+; CHECK: br %r14
+  %and = and i32 %a, 1
+  ret i32 %and
+}
+
+; Check the highest 16-bit constant that must be handled by NILF.
+define i32 @f2(i32 %a) {
+; CHECK: f2:
+; CHECK: nilf %r2, 65534
+; CHECK: br %r14
+  %and = and i32 %a, 65534
+  ret i32 %and
+}
+
+; ANDs of 0xffff are zero extensions from i16.
+define i32 @f3(i32 %a) {
+; CHECK: f3:
+; CHECK: llhr %r2, %r2
+; CHECK: br %r14
+  %and = and i32 %a, 65535
+  ret i32 %and
+}
+
+; Check the next value up, which must again use NILF.
+define i32 @f4(i32 %a) {
+; CHECK: f4:
+; CHECK: nilf %r2, 65536
+; CHECK: br %r14
+  %and = and i32 %a, 65536
+  ret i32 %and
+}
+
+; Check the lowest useful NILH value.  (LLHR is used instead of NILH of 0.)
+define i32 @f5(i32 %a) {
+; CHECK: f5:
+; CHECK: nilh %r2, 1
+; CHECK: br %r14
+  %and = and i32 %a, 131071
+  ret i32 %and
+}
+
+; Check the highest useful NILF value.
+define i32 @f6(i32 %a) {
+; CHECK: f6:
+; CHECK: nilf %r2, 4294901758
+; CHECK: br %r14
+  %and = and i32 %a, -65538
+  ret i32 %and
+}
+
+; Check the highest useful NILH value, which is one up from the above.
+define i32 @f7(i32 %a) {
+; CHECK: f7:
+; CHECK: nilh %r2, 65534
+; CHECK: br %r14
+  %and = and i32 %a, -65537
+  ret i32 %and
+}
+
+; Check the low end of the NILL range, which is one up again.
+define i32 @f8(i32 %a) {
+; CHECK: f8:
+; CHECK: nill %r2, 0
+; CHECK: br %r14
+  %and = and i32 %a, -65536
+  ret i32 %and
+}
+
+; Check the next value up.
+define i32 @f9(i32 %a) {
+; CHECK: f9:
+; CHECK: nill %r2, 1
+; CHECK: br %r14
+  %and = and i32 %a, -65535
+  ret i32 %and
+}
+
+; Check the highest useful NILL value.
+define i32 @f10(i32 %a) {
+; CHECK: f10:
+; CHECK: nill %r2, 65534
+; CHECK: br %r14
+  %and = and i32 %a, -2
+  ret i32 %and
+}