Changes to ARM tail calls, mostly cosmetic.

Add explicit testcases for tail calls within the same module.
Duplicate some code to humor those who think .w doesn't apply on ARM.
Leave this disabled on Thumb1, and add some comments explaining why it's hard
and won't gain much.

llvm-svn: 107851

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Thumb2/thumb2-call-tc.ll b/llvm/test/CodeGen/Thumb2/thumb2-call-tc.ll
index fe47e348ab2..24502b0338c 100644
--- a/llvm/test/CodeGen/Thumb2/thumb2-call-tc.ll
+++ b/llvm/test/CodeGen/Thumb2/thumb2-call-tc.ll
@@ -25,3 +25,13 @@ define void @h() {
         %tmp.upgrd.2 = tail call i32 %tmp( )            ; <i32> [#uses=0]
         ret void
 }
+
+define void @j() {
+; DARWIN: j:
+; DARWIN: b.w _f  @ TAILCALL
+
+; LINUX: j:
+; LINUX: b.w f  @ TAILCALL
+        tail call void @f()
+        ret void
+}