[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/int-add-08.ll b/llvm/test/CodeGen/SystemZ/int-add-08.ll
new file mode 100644
index 0000000..b1f820f
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/int-add-08.ll
@@ -0,0 +1,110 @@
+; Test 128-bit addition in which the second operand is variable.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Test register addition.
+define void @f1(i128 *%ptr) {
+; CHECK: f1:
+; CHECK: algr
+; CHECK: alcgr
+; CHECK: br %r14
+ %value = load i128 *%ptr
+ %add = add i128 %value, %value
+ store i128 %add, i128 *%ptr
+ ret void
+}
+
+; Test memory addition with no offset. Making the load of %a volatile
+; should force the memory operand to be %b.
+define void @f2(i128 *%aptr, i64 %addr) {
+; CHECK: f2:
+; CHECK: alg {{%r[0-5]}}, 8(%r3)
+; CHECK: alcg {{%r[0-5]}}, 0(%r3)
+; CHECK: br %r14
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+
+; Test the highest aligned offset that is in range of both ALG and ALCG.
+define void @f3(i128 *%aptr, i64 %base) {
+; CHECK: f3:
+; CHECK: alg {{%r[0-5]}}, 524280(%r3)
+; CHECK: alcg {{%r[0-5]}}, 524272(%r3)
+; CHECK: br %r14
+ %addr = add i64 %base, 524272
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+
+; Test the next doubleword up, which requires separate address logic for ALG.
+define void @f4(i128 *%aptr, i64 %base) {
+; CHECK: f4:
+; CHECK: lgr [[BASE:%r[1-5]]], %r3
+; CHECK: agfi [[BASE]], 524288
+; CHECK: alg {{%r[0-5]}}, 0([[BASE]])
+; CHECK: alcg {{%r[0-5]}}, 524280(%r3)
+; CHECK: br %r14
+ %addr = add i64 %base, 524280
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+
+; Test the next doubleword after that, which requires separate logic for
+; both instructions. It would be better to create an anchor at 524288
+; that both instructions can use, but that isn't implemented yet.
+define void @f5(i128 *%aptr, i64 %base) {
+; CHECK: f5:
+; CHECK: alg {{%r[0-5]}}, 0({{%r[1-5]}})
+; CHECK: alcg {{%r[0-5]}}, 0({{%r[1-5]}})
+; CHECK: br %r14
+ %addr = add i64 %base, 524288
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+
+; Test the lowest displacement that is in range of both ALG and ALCG.
+define void @f6(i128 *%aptr, i64 %base) {
+; CHECK: f6:
+; CHECK: alg {{%r[0-5]}}, -524280(%r3)
+; CHECK: alcg {{%r[0-5]}}, -524288(%r3)
+; CHECK: br %r14
+ %addr = add i64 %base, -524288
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+
+; Test the next doubleword down, which is out of range of the ALCG.
+define void @f7(i128 *%aptr, i64 %base) {
+; CHECK: f7:
+; CHECK: alg {{%r[0-5]}}, -524288(%r3)
+; CHECK: alcg {{%r[0-5]}}, 0({{%r[1-5]}})
+; CHECK: br %r14
+ %addr = add i64 %base, -524296
+ %bptr = inttoptr i64 %addr to i128 *
+ %a = load volatile i128 *%aptr
+ %b = load i128 *%bptr
+ %add = add i128 %a, %b
+ store i128 %add, i128 *%aptr
+ ret void
+}
+