Enable EHABI by default

After all hard work to implement the EHABI and with the test-suite
passing, it's time to turn it on by default and allow users to
disable it as a work-around while we fix the eventual bugs that show
up.

This commit also remove the -arm-enable-ehabi-descriptors, since we
want the tables to be printed every time the EHABI is turned on
for non-Darwin ARM targets.

Although MCJIT EHABI is not working yet (needs linking with the right
libraries), this commit also fixes some relocations on MCJIT regarding
the EH tables/lib calls, and update some tests to avoid using EH tables
when none are needed.

The EH tests in the test-suite that were previously disabled on ARM
now pass with these changes, so a follow-up commit on the test-suite
will re-enable them.

llvm-svn: 200388

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
index 9c40ac8a7a4..46bd34fe392 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -1106,7 +1106,7 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
   }
 }
 
-extern cl::opt<bool> EnableARMEHABI;
+extern cl::opt<bool> DisableARMEHABI;
 
 // Simple pseudo-instructions have their lowering (with expansion to real
 // instructions) auto-generated.
@@ -1122,7 +1122,8 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
   }
 
   // Emit unwinding stuff for frame-related instructions
-  if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
+  if (Subtarget->isTargetEHABICompatible() && !DisableARMEHABI &&
+       MI->getFlag(MachineInstr::FrameSetup))
     EmitUnwindingInstruction(MI);
 
   // Do any auto-generated pseudo lowerings.