1 files changed, 48 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/asm-18.ll b/test/CodeGen/SystemZ/asm-18.ll
index ed285a0..6eb0083 100644
--- a/test/CodeGen/SystemZ/asm-18.ll
+++ b/test/CodeGen/SystemZ/asm-18.ll
@@ -98,3 +98,51 @@ define void @f4(i16 *%ptr1, i16 *%ptr2) {
                            "h,r,h,r"(i32 %ext1, i32 %ext2, i32 %ext3, i32 %ext4)
   ret void
 }
+
+; Test zero-extending 8-bit loads into mixtures of high and low registers.
+define void @f5(i8 *%ptr1, i8 *%ptr2) {
+; CHECK-LABEL: f5:
+; CHECK-DAG: llch [[REG1:%r[0-5]]], 0(%r2)
+; CHECK-DAG: llc [[REG2:%r[0-5]]], 0(%r3)
+; CHECK-DAG: llch [[REG3:%r[0-5]]], 4096(%r2)
+; CHECK-DAG: llc [[REG4:%r[0-5]]], 524287(%r3)
+; CHECK: blah [[REG1]], [[REG2]]
+; CHECK: br %r14
+  %ptr3 = getelementptr i8 *%ptr1, i64 4096
+  %ptr4 = getelementptr i8 *%ptr2, i64 524287
+  %val1 = load i8 *%ptr1
+  %val2 = load i8 *%ptr2
+  %val3 = load i8 *%ptr3
+  %val4 = load i8 *%ptr4
+  %ext1 = zext i8 %val1 to i32
+  %ext2 = zext i8 %val2 to i32
+  %ext3 = zext i8 %val3 to i32
+  %ext4 = zext i8 %val4 to i32
+  call void asm sideeffect "blah $0, $1, $2, $3",
+                           "h,r,h,r"(i32 %ext1, i32 %ext2, i32 %ext3, i32 %ext4)
+  ret void
+}
+
+; Test zero-extending 16-bit loads into mixtures of high and low registers.
+define void @f6(i16 *%ptr1, i16 *%ptr2) {
+; CHECK-LABEL: f6:
+; CHECK-DAG: llhh [[REG1:%r[0-5]]], 0(%r2)
+; CHECK-DAG: llh [[REG2:%r[0-5]]], 0(%r3)
+; CHECK-DAG: llhh [[REG3:%r[0-5]]], 4096(%r2)
+; CHECK-DAG: llh [[REG4:%r[0-5]]], 524286(%r3)
+; CHECK: blah [[REG1]], [[REG2]]
+; CHECK: br %r14
+  %ptr3 = getelementptr i16 *%ptr1, i64 2048
+  %ptr4 = getelementptr i16 *%ptr2, i64 262143
+  %val1 = load i16 *%ptr1
+  %val2 = load i16 *%ptr2
+  %val3 = load i16 *%ptr3
+  %val4 = load i16 *%ptr4
+  %ext1 = zext i16 %val1 to i32
+  %ext2 = zext i16 %val2 to i32
+  %ext3 = zext i16 %val3 to i32
+  %ext4 = zext i16 %val4 to i32
+  call void asm sideeffect "blah $0, $1, $2, $3",
+                           "h,r,h,r"(i32 %ext1, i32 %ext2, i32 %ext3, i32 %ext4)
+  ret void
+}