1 files changed, 133 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-cmp-28.ll b/test/CodeGen/SystemZ/int-cmp-28.ll
new file mode 100644
index 000000000000..629eb4f06013
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-cmp-28.ll
@@ -0,0 +1,133 @@
+; Test 64-bit equality comparisons that are really between a memory halfword
+; and a constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the low end of the 16-bit unsigned range, with zero extension.
+define double @f1(double %a, double %b, i16 *%ptr) {
+; CHECK: f1:
+; CHECK: clhhsi 0(%r2), 0
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = zext i16 %val to i64
+  %cond = icmp eq i64 %ext, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the 16-bit unsigned range, with zero extension.
+define double @f2(double %a, double %b, i16 *%ptr) {
+; CHECK: f2:
+; CHECK: clhhsi 0(%r2), 65535
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = zext i16 %val to i64
+  %cond = icmp eq i64 %ext, 65535
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, with zero extension.  The condition is always false.
+define double @f3(double %a, double %b, i16 *%ptr) {
+; CHECK: f3:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = zext i16 %val to i64
+  %cond = icmp eq i64 %ext, 65536
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with -1, with zero extension.
+; This condition is also always false.
+define double @f4(double %a, double %b, i16 *%ptr) {
+; CHECK: f4:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = zext i16 %val to i64
+  %cond = icmp eq i64 %ext, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with 0, using sign extension.
+define double @f5(double %a, double %b, i16 *%ptr) {
+; CHECK: f5:
+; CHECK: clhhsi 0(%r2), 0
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the signed 16-bit range, using sign extension.
+define double @f6(double %a, double %b, i16 *%ptr) {
+; CHECK: f6:
+; CHECK: clhhsi 0(%r2), 32767
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, 32767
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, using sign extension.
+; The condition is always false.
+define double @f7(double %a, double %b, i16 *%ptr) {
+; CHECK: f7:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, 32768
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with -1, using sign extension.
+define double @f8(double %a, double %b, i16 *%ptr) {
+; CHECK: f8:
+; CHECK: clhhsi 0(%r2), 65535
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the low end of the signed 16-bit range, using sign extension.
+define double @f9(double %a, double %b, i16 *%ptr) {
+; CHECK: f9:
+; CHECK: clhhsi 0(%r2), 32768
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, -32768
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value down, using sign extension.
+; The condition is always false.
+define double @f10(double %a, double %b, i16 *%ptr) {
+; CHECK: f10:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %ext = sext i16 %val to i64
+  %cond = icmp eq i64 %ext, -32769
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}