[SystemZ] Add AHIK and AGHIK

I did these as a separate patch because it uses a slightly different
form of RIE layout.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186687 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 67 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-add-15.ll b/test/CodeGen/SystemZ/int-add-15.ll
new file mode 100644
index 0000000000..041ec19142
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-add-15.ll
@@ -0,0 +1,67 @@
+; Test 64-bit addition in which the second operand is constant and in which
+; three-operand forms are available.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
+
+; Check additions of 1.
+define i64 @f1(i64 %a, i64 %b) {
+; CHECK-LABEL: f1:
+; CHECK: {{aghik %r2, %r3, 1|la %r2, 1\(%r3\)}}
+; CHECK: br %r14
+  %add = add i64 %b, 1
+  ret i64 %add
+}
+
+; Check the high end of the AGHIK range.
+define i64 @f2(i64 %a, i64 %b) {
+; CHECK-LABEL: f2:
+; CHECK: aghik %r2, %r3, 32767
+; CHECK: br %r14
+  %add = add i64 %b, 32767
+  ret i64 %add
+}
+
+; Check the next value up, which must use AGFI instead.
+define i64 @f3(i64 %a, i64 %b) {
+; CHECK-LABEL: f3:
+; CHECK: {{agfi %r[0-5], 32768|lay %r2, 32768\(%r3\)}}
+; CHECK: br %r14
+  %add = add i64 %b, 32768
+  ret i64 %add
+}
+
+; Check the high end of the negative AGHIK range.
+define i64 @f4(i64 %a, i64 %b) {
+; CHECK-LABEL: f4:
+; CHECK: aghik %r2, %r3, -1
+; CHECK: br %r14
+  %add = add i64 %b, -1
+  ret i64 %add
+}
+
+; Check the low end of the AGHIK range.
+define i64 @f5(i64 %a, i64 %b) {
+; CHECK-LABEL: f5:
+; CHECK: aghik %r2, %r3, -32768
+; CHECK: br %r14
+  %add = add i64 %b, -32768
+  ret i64 %add
+}
+
+; Check the next value down, which must use AGFI instead.
+define i64 @f6(i64 %a, i64 %b) {
+; CHECK-LABEL: f6:
+; CHECK: {{agfi %r[0-5], -32769|lay %r2, -32769\(%r3\)}}
+; CHECK: br %r14
+  %add = add i64 %b, -32769
+  ret i64 %add
+}
+
+; Check that AGHI is still used in obvious cases.
+define i64 @f7(i64 %a) {
+; CHECK-LABEL: f7:
+; CHECK: aghi %r2, 32000
+; CHECK: br %r14
+  %add = add i64 %a, 32000
+  ret i64 %add
+}