3 files changed, 50 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/AArch64/arm64-named-reg-alloc.ll b/llvm/test/CodeGen/AArch64/arm64-named-reg-alloc.ll
index 0c564544a53..5d48c17e128 100644
--- a/llvm/test/CodeGen/AArch64/arm64-named-reg-alloc.ll
+++ b/llvm/test/CodeGen/AArch64/arm64-named-reg-alloc.ll
@@ -4,7 +4,7 @@
 define i32 @get_stack() nounwind {
 entry:
 ; FIXME: Include an allocatable-specific error message
-; CHECK: Invalid register name global variable
+; CHECK: Invalid register name "x5".
 	%sp = call i32 @llvm.read_register.i32(metadata !0)
   ret i32 %sp
 }
diff --git a/llvm/test/CodeGen/AArch64/arm64-named-reg-notareg.ll b/llvm/test/CodeGen/AArch64/arm64-named-reg-notareg.ll
index 759bc15807b..8a5fd6f1ac8 100644
--- a/llvm/test/CodeGen/AArch64/arm64-named-reg-notareg.ll
+++ b/llvm/test/CodeGen/AArch64/arm64-named-reg-notareg.ll
@@ -3,7 +3,7 @@
 
 define i32 @get_stack() nounwind {
 entry:
-; CHECK: Invalid register name global variable
+; CHECK: Invalid register name "notareg".
 	%sp = call i32 @llvm.read_register.i32(metadata !0)
   ret i32 %sp
 }
diff --git a/llvm/test/CodeGen/AArch64/special-reg.ll b/llvm/test/CodeGen/AArch64/special-reg.ll
new file mode 100644
index 00000000000..91c32158d42
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/special-reg.ll
@@ -0,0 +1,48 @@
+; RUN: llc < %s -mtriple=aarch64-none-eabi -mcpu=cortex-a57 2>&1 | FileCheck %s
+
+define i64 @read_encoded_register() nounwind {
+entry:
+; CHECK-LABEL: read_encoded_register:
+; CHECK: mrs x0, S1_2_C3_C4_5
+  %reg = call i64 @llvm.read_register.i64(metadata !0)
+  ret i64 %reg
+}
+
+define i64 @read_daif() nounwind {
+entry:
+; CHECK-LABEL: read_daif:
+; CHECK: mrs x0, DAIF
+  %reg = call i64 @llvm.read_register.i64(metadata !1)
+  ret i64 %reg
+}
+
+define void @write_encoded_register(i64 %x) nounwind {
+entry:
+; CHECK-LABEL: write_encoded_register:
+; CHECK: msr S1_2_C3_C4_5, x0
+  call void @llvm.write_register.i64(metadata !0, i64 %x)
+  ret void
+}
+
+define void @write_daif(i64 %x) nounwind {
+entry:
+; CHECK-LABEL: write_daif:
+; CHECK: msr DAIF, x0
+  call void @llvm.write_register.i64(metadata !1, i64 %x)
+  ret void
+}
+
+define void @write_daifset() nounwind {
+entry:
+; CHECK-LABEL: write_daifset:
+; CHECK: msr DAIFSET, #2
+  call void @llvm.write_register.i64(metadata !2, i64 2)
+  ret void
+}
+
+declare i64 @llvm.read_register.i64(metadata) nounwind
+declare void @llvm.write_register.i64(metadata, i64) nounwind
+
+!0 = !{!"1:2:3:4:5"}
+!1 = !{!"daif"}
+!2 = !{!"daifset"}