1 files changed, 69 insertions, 2 deletions
diff --git a/test/CodeGen/ARM/call-tc.ll b/test/CodeGen/ARM/call-tc.ll
index f78d998..94edff5 100644
--- a/test/CodeGen/ARM/call-tc.ll
+++ b/test/CodeGen/ARM/call-tc.ll
@@ -1,6 +1,6 @@
-; RUN: llc < %s -mtriple=armv6-apple-darwin -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKV6
+; RUN: llc < %s -mtriple=armv6-apple-ios -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKV6
 ; RUN: llc < %s -mtriple=armv6-linux-gnueabi -relocation-model=pic -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKELF
-; RUN: llc < %s -mtriple=thumbv7-apple-darwin -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D
+; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D
 ; RUN: llc < %s -mtriple=thumbv7-apple-ios5.0 | FileCheck %s -check-prefix=CHECKT2D
 
 ; Enable tailcall optimization for iOS 5.0
@@ -96,3 +96,70 @@ bb:
   tail call void @foo() nounwind
   ret void
 }
+
+; Make sure codegenprep is duplicating ret instructions to enable tail calls.
+; rdar://11140249
+define i32 @t8(i32 %x) nounwind ssp {
+entry:
+; CHECKT2D: t8:
+; CHECKT2D-NOT: push
+; CHECKT2D-NOT
+  %and = and i32 %x, 1
+  %tobool = icmp eq i32 %and, 0
+  br i1 %tobool, label %if.end, label %if.then
+
+if.then:                                          ; preds = %entry
+; CHECKT2D: bne.w _a
+  %call = tail call i32 @a(i32 %x) nounwind
+  br label %return
+
+if.end:                                           ; preds = %entry
+  %and1 = and i32 %x, 2
+  %tobool2 = icmp eq i32 %and1, 0
+  br i1 %tobool2, label %if.end5, label %if.then3
+
+if.then3:                                         ; preds = %if.end
+; CHECKT2D: bne.w _b
+  %call4 = tail call i32 @b(i32 %x) nounwind
+  br label %return
+
+if.end5:                                          ; preds = %if.end
+; CHECKT2D: b.w _c
+  %call6 = tail call i32 @c(i32 %x) nounwind
+  br label %return
+
+return:                                           ; preds = %if.end5, %if.then3, %if.then
+  %retval.0 = phi i32 [ %call, %if.then ], [ %call4, %if.then3 ], [ %call6, %if.end5 ]
+  ret i32 %retval.0
+}
+
+declare i32 @a(i32)
+
+declare i32 @b(i32)
+
+declare i32 @c(i32)
+
+; PR12419
+; rdar://11195178
+; Use the correct input chain for the tailcall node or else the call to
+; _ZN9MutexLockD1Ev would be lost.
+%class.MutexLock = type { i8 }
+
+@x = external global i32, align 4
+
+define i32 @t9() nounwind {
+; CHECKT2D: t9:
+; CHECKT2D: blx __ZN9MutexLockC1Ev
+; CHECKT2D: blx __ZN9MutexLockD1Ev
+; CHECKT2D: b.w ___divsi3
+  %lock = alloca %class.MutexLock, align 1
+  %1 = call %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock* %lock)
+  %2 = load i32* @x, align 4
+  %3 = sdiv i32 1000, %2
+  %4 = call %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock* %lock)
+  ret i32 %3
+}
+
+declare %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock*) unnamed_addr nounwind align 2
+
+declare %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock*) unnamed_addr nounwind align 2