Implement @llvm.returnaddress. rdar://8015977.

llvm-svn: 104421

2 files changed, 29 insertions, 2 deletions

diff --git a/llvm/test/CodeGen/ARM/arm-frameaddr.ll b/llvm/test/CodeGen/ARM/arm-frameaddr.ll
index 273986034c9..1c7ac25e073 100644
--- a/llvm/test/CodeGen/ARM/arm-frameaddr.ll
+++ b/llvm/test/CodeGen/ARM/arm-frameaddr.ll
@@ -1,10 +1,15 @@
-; RUN: llc < %s -mtriple=arm-apple-darwin  | grep mov | grep r7
-; RUN: llc < %s -mtriple=arm-linux-gnueabi | grep mov | grep r11
+; RUN: llc < %s -mtriple=arm-apple-darwin  | FileCheck %s -check-prefix=DARWIN
+; RUN: llc < %s -mtriple=arm-linux-gnueabi | FileCheck %s -check-prefix=LINUX
 ; PR4344
 ; PR4416
 
 define arm_aapcscc i8* @t() nounwind {
 entry:
+; DARWIN: t:
+; DARWIN: mov r0, r7
+
+; LINUX: t:
+; LINUX: mov r0, r11
 	%0 = call i8* @llvm.frameaddress(i32 0)
         ret i8* %0
 }
diff --git a/llvm/test/CodeGen/ARM/arm-returnaddr.ll b/llvm/test/CodeGen/ARM/arm-returnaddr.ll
new file mode 100644
index 00000000000..5bf476dbf86
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/arm-returnaddr.ll
@@ -0,0 +1,22 @@
+; RUN: llc < %s -mtriple=arm-apple-darwin | FileCheck %s
+; rdar://8015977
+
+define arm_apcscc i8* @rt0(i32 %x) nounwind readnone {
+entry:
+; CHECK: rt0:
+; CHECK: mov r0, lr
+  %0 = tail call i8* @llvm.returnaddress(i32 0)
+  ret i8* %0
+}
+
+define arm_apcscc i8* @rt2() nounwind readnone {
+entry:
+; CHECK: rt2:
+; CHECK: ldr r0, [r7]
+; CHECK: ldr r0, [r0]
+; CHECK: ldr r0, [r0, #4]
+  %0 = tail call i8* @llvm.returnaddress(i32 2)
+  ret i8* %0
+}
+
+declare i8* @llvm.returnaddress(i32) nounwind readnone