1 files changed, 128 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-cmp-22.ll b/test/CodeGen/SystemZ/int-cmp-22.ll
new file mode 100644
index 000000000000..513d4be2f423
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-cmp-22.ll
@@ -0,0 +1,128 @@
+; Test 16-bit signed ordered comparisons between memory and a constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check comparisons with 0.
+define double @f1(double %a, double %b, i16 *%ptr) {
+; CHECK: f1:
+; CHECK: chhsi 0(%r2), 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with 1.
+define double @f2(double %a, double %b, i16 *%ptr) {
+; CHECK: f2:
+; CHECK: chhsi 0(%r2), 1
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check a value near the high end of the signed 16-bit range.
+define double @f3(double %a, double %b, i16 *%ptr) {
+; CHECK: f3:
+; CHECK: chhsi 0(%r2), 32766
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 32766
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with -1.
+define double @f4(double %a, double %b, i16 *%ptr) {
+; CHECK: f4:
+; CHECK: chhsi 0(%r2), -1
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check a value near the low end of the 16-bit signed range.
+define double @f5(double %a, double %b, i16 *%ptr) {
+; CHECK: f5:
+; CHECK: chhsi 0(%r2), -32766
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, -32766
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the CHHSI range.
+define double @f6(double %a, double %b, i16 %i1, i16 *%base) {
+; CHECK: f6:
+; CHECK: chhsi 4094(%r3), 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%base, i64 2047
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next halfword up, which needs separate address logic,
+define double @f7(double %a, double %b, i16 *%base) {
+; CHECK: f7:
+; CHECK: aghi %r2, 4096
+; CHECK: chhsi 0(%r2), 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%base, i64 2048
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check negative offsets, which also need separate address logic.
+define double @f8(double %a, double %b, i16 *%base) {
+; CHECK: f8:
+; CHECK: aghi %r2, -2
+; CHECK: chhsi 0(%r2), 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %ptr = getelementptr i16 *%base, i64 -1
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check that CHHSI does not allow indices.
+define double @f9(double %a, double %b, i64 %base, i64 %index) {
+; CHECK: f9:
+; CHECK: agr {{%r2, %r3|%r3, %r2}}
+; CHECK: chhsi 0({{%r[23]}}), 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %add = add i64 %base, %index
+  %ptr = inttoptr i64 %add to i16 *
+  %val = load i16 *%ptr
+  %cond = icmp slt i16 %val, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}