1 files changed, 159 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-mul-06.ll b/test/CodeGen/SystemZ/int-mul-06.ll
new file mode 100644
index 0000000..a354605
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-mul-06.ll
@@ -0,0 +1,159 @@
+; Test 64-bit multiplication in which the second operand is constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check multiplication by 2, which should use shifts.
+define i64 @f1(i64 %a, i64 *%dest) {
+; CHECK: f1:
+; CHECK: sllg %r2, %r2, 1
+; CHECK: br %r14
+  %mul = mul i64 %a, 2
+  ret i64 %mul
+}
+
+; Check multiplication by 3.
+define i64 @f2(i64 %a, i64 *%dest) {
+; CHECK: f2:
+; CHECK: mghi %r2, 3
+; CHECK: br %r14
+  %mul = mul i64 %a, 3
+  ret i64 %mul
+}
+
+; Check the high end of the MGHI range.
+define i64 @f3(i64 %a, i64 *%dest) {
+; CHECK: f3:
+; CHECK: mghi %r2, 32767
+; CHECK: br %r14
+  %mul = mul i64 %a, 32767
+  ret i64 %mul
+}
+
+; Check the next value up, which should use shifts.
+define i64 @f4(i64 %a, i64 *%dest) {
+; CHECK: f4:
+; CHECK: sllg %r2, %r2, 15
+; CHECK: br %r14
+  %mul = mul i64 %a, 32768
+  ret i64 %mul
+}
+
+; Check the next value up again, which can use MSGFI.
+define i64 @f5(i64 %a, i64 *%dest) {
+; CHECK: f5:
+; CHECK: msgfi %r2, 32769
+; CHECK: br %r14
+  %mul = mul i64 %a, 32769
+  ret i64 %mul
+}
+
+; Check the high end of the MSGFI range.
+define i64 @f6(i64 %a, i64 *%dest) {
+; CHECK: f6:
+; CHECK: msgfi %r2, 2147483647
+; CHECK: br %r14
+  %mul = mul i64 %a, 2147483647
+  ret i64 %mul
+}
+
+; Check the next value up, which should use shifts.
+define i64 @f7(i64 %a, i64 *%dest) {
+; CHECK: f7:
+; CHECK: sllg %r2, %r2, 31
+; CHECK: br %r14
+  %mul = mul i64 %a, 2147483648
+  ret i64 %mul
+}
+
+; Check the next value up again, which cannot use a constant multiplicatoin.
+define i64 @f8(i64 %a, i64 *%dest) {
+; CHECK: f8:
+; CHECK-NOT: msgfi
+; CHECK: br %r14
+  %mul = mul i64 %a, 2147483649
+  ret i64 %mul
+}
+
+; Check multiplication by -1, which is a negation.
+define i64 @f9(i64 %a, i64 *%dest) {
+; CHECK: f9:
+; CHECK: lcgr {{%r[0-5]}}, %r2
+; CHECK: br %r14
+  %mul = mul i64 %a, -1
+  ret i64 %mul
+}
+
+; Check multiplication by -2, which should use shifts.
+define i64 @f10(i64 %a, i64 *%dest) {
+; CHECK: f10:
+; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 1
+; CHECK: lcgr %r2, [[SHIFTED]]
+; CHECK: br %r14
+  %mul = mul i64 %a, -2
+  ret i64 %mul
+}
+
+; Check multiplication by -3.
+define i64 @f11(i64 %a, i64 *%dest) {
+; CHECK: f11:
+; CHECK: mghi %r2, -3
+; CHECK: br %r14
+  %mul = mul i64 %a, -3
+  ret i64 %mul
+}
+
+; Check the lowest useful MGHI value.
+define i64 @f12(i64 %a, i64 *%dest) {
+; CHECK: f12:
+; CHECK: mghi %r2, -32767
+; CHECK: br %r14
+  %mul = mul i64 %a, -32767
+  ret i64 %mul
+}
+
+; Check the next value down, which should use shifts.
+define i64 @f13(i64 %a, i64 *%dest) {
+; CHECK: f13:
+; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 15
+; CHECK: lcgr %r2, [[SHIFTED]]
+; CHECK: br %r14
+  %mul = mul i64 %a, -32768
+  ret i64 %mul
+}
+
+; Check the next value down again, which can use MSGFI.
+define i64 @f14(i64 %a, i64 *%dest) {
+; CHECK: f14:
+; CHECK: msgfi %r2, -32769
+; CHECK: br %r14
+  %mul = mul i64 %a, -32769
+  ret i64 %mul
+}
+
+; Check the lowest useful MSGFI value.
+define i64 @f15(i64 %a, i64 *%dest) {
+; CHECK: f15:
+; CHECK: msgfi %r2, -2147483647
+; CHECK: br %r14
+  %mul = mul i64 %a, -2147483647
+  ret i64 %mul
+}
+
+; Check the next value down, which should use shifts.
+define i64 @f16(i64 %a, i64 *%dest) {
+; CHECK: f16:
+; CHECK: sllg [[SHIFTED:%r[0-5]]], %r2, 31
+; CHECK: lcgr %r2, [[SHIFTED]]
+; CHECK: br %r14
+  %mul = mul i64 %a, -2147483648
+  ret i64 %mul
+}
+
+; Check the next value down again, which cannot use constant multiplication
+define i64 @f17(i64 %a, i64 *%dest) {
+; CHECK: f17:
+; CHECK-NOT: msgfi
+; CHECK: br %r14
+  %mul = mul i64 %a, -2147483649
+  ret i64 %mul
+}