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Early implementation of tail call for ARM.

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A temporary flag -arm-tail-calls defaults to off,
so there is no functional change by default.
Intrepid users may try this; simple cases work
but there are bugs.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105413 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2010-06-03 21:09:53 +00:00
parent 400f75cb5e
commit 51e28e6348
6 changed files with 378 additions and 6 deletions
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7
utils/TableGen/ARMDecoderEmitter.cpp
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@ -1575,6 +1575,13 @@ bool ARMDecoderEmitter::ARMDEBackend::populateInstruction(
if (Name == "BXr9" || Name == "BMOVPCRX" || Name == "BMOVPCRXr9")
return false;
// Tail calls are other patterns that generate existing instructions.
if (Name == "TCRETURNdi" || Name == "TCRETURNdiND" ||
Name == "TCRETURNri" || Name == "TCRETURNriND" ||
Name == "TAILJMPd" || Name == "TAILJMPdND" ||
Name == "TAILJMPr" || Name == "TAILJMPrND")
return false;
// VLDMQ/VSTMQ can be hanlded with the more generic VLDMD/VSTMD.
if (Name == "VLDMQ" || Name == "VLDMQ_UPD" ||
Name == "VSTMQ" || Name == "VSTMQ_UPD")