Vendor import of llvm release_34 branch r197841 (effectively, 3.4 RC3):vendor/llvm/llvm-release_34-r197841

https://llvm.org/svn/llvm-project/llvm/branches/release_34@197841

1 files changed, 93 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-add-16.ll b/test/CodeGen/SystemZ/int-add-16.ll
new file mode 100644
index 000000000000..36cc13e5fc6e
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-add-16.ll
@@ -0,0 +1,93 @@
+; Test 128-bit addition when the distinct-operands facility is available.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
+
+; Test the case where both operands are in registers.
+define i64 @f1(i64 %a, i64 %b, i64 %c, i64 %d, i64 *%ptr) {
+; CHECK-LABEL: f1:
+; CHECK: algrk %r2, %r4, %r5
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %b, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %c, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %y2 = insertelement <2 x i64> %x1, i64 %d, i32 1
+  %y = bitcast <2 x i64> %y2 to i128
+  %add = add i128 %x, %y
+  %addv = bitcast i128 %add to <2 x i64>
+  %high = extractelement <2 x i64> %addv, i32 0
+  store i64 %high, i64 *%ptr
+  %low = extractelement <2 x i64> %addv, i32 1
+  ret i64 %low
+}
+
+; Test addition of 1.
+define void @f2(i64 %a, i64 %b, i128 *%ptr) {
+; CHECK-LABEL: f2:
+; CHECK: alghsik {{%r[0-5]}}, %r3, 1
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %a, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %b, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %add = add i128 %x, 1
+  store i128 %add, i128 *%ptr
+  ret void
+}
+
+; Test the upper end of the ALGHSIK range.
+define void @f3(i64 %a, i64 %b, i128 *%ptr) {
+; CHECK-LABEL: f3:
+; CHECK: alghsik {{%r[0-5]}}, %r3, 32767
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %a, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %b, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %add = add i128 %x, 32767
+  store i128 %add, i128 *%ptr
+  ret void
+}
+
+; Test the next value up, which should use ALGFI instead.
+define void @f4(i64 %a, i64 %b, i128 *%ptr) {
+; CHECK-LABEL: f4:
+; CHECK: algfi %r3, 32768
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %a, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %b, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %add = add i128 %x, 32768
+  store i128 %add, i128 *%ptr
+  ret void
+}
+
+; Test the lower end of the ALGHSIK range.
+define void @f5(i64 %a, i64 %b, i128 *%ptr) {
+; CHECK-LABEL: f5:
+; CHECK: alghsik {{%r[0-5]}}, %r3, -32768
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %a, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %b, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %add = add i128 %x, -32768
+  store i128 %add, i128 *%ptr
+  ret void
+}
+
+; Test the next value down, which cannot use either ALGHSIK or ALGFI.
+define void @f6(i64 %a, i64 %b, i128 *%ptr) {
+; CHECK-LABEL: f6:
+; CHECK-NOT: alghsik
+; CHECK-NOT: algfi
+; CHECK: alcgr
+; CHECK: br %r14
+  %x1 = insertelement <2 x i64> undef, i64 %a, i32 0
+  %x2 = insertelement <2 x i64> %x1, i64 %b, i32 1
+  %x = bitcast <2 x i64> %x2 to i128
+  %add = add i128 %x, -32769
+  store i128 %add, i128 *%ptr
+  ret void
+}