[PATCH] Add tail call optimization for thumb1-only targets rev. 3

[Jonathan Roelofs]

This looks good, but I don't feel comfortable signing off on it. @t.p.northover, any thoughts on this?


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Comment at: test/CodeGen/ARM/threeParametersTailCall_v6m.ll:28
@@ +27,3 @@
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "thumbv6m-none--eabi"
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I think there's only supposed to be one of these per file. Same for the triple.

http://reviews.llvm.org/D7005

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