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Author SHA1 Message Date
Bob Wilson 3c9ed76ba5 Temporarily disable tail calls on ARM to work around some linker problems. 
llvm-svn: 111050
 2010-08-13 22:43:33 +00:00
Dale Johannesen e2289285ae 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
 2010-07-08 01:18:23 +00:00
Evan Cheng f3c01f3ef6 Disable sibcall optimization for Thumb1 for now since Thumb1RegisterInfo::emitEpilogue is not expecting them. 
llvm-svn: 106368
 2010-06-19 01:01:32 +00:00
Dale Johannesen c1570dda5c Enable tail calls on ARM by default, with some 
basic tests.

This has been well tested on Darwin but not elsewhere.
It should work provided the linker correctly resolves
  B.W  <label in other function>
which it has not seen before, at least from llvm-based
compilers.  I'm leaving the arm-tail-calls switch in
until I see if there's any problems because of that;
it might need to be disabled for some environments.

llvm-svn: 106299
 2010-06-18 19:00:18 +00:00