Early implementation of tail call for ARM.
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
diff --git a/utils/TableGen/ARMDecoderEmitter.cpp b/utils/TableGen/ARMDecoderEmitter.cpp
index c879a54..5f154b6 100644
--- a/utils/TableGen/ARMDecoderEmitter.cpp
+++ b/utils/TableGen/ARMDecoderEmitter.cpp
@@ -1575,6 +1575,13 @@
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")