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, 14 insertions, 22 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
index a33b549faa7..6e79bef8d04 100644
--- a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -36,12 +36,6 @@
 #include "llvm/Target/TargetRegisterInfo.h"
 using namespace llvm;
 
-static cl::opt<bool>
-EnableARMEHABIDescriptors("arm-enable-ehabi-descriptors", cl::Hidden,
-  cl::desc("Generate ARM EHABI tables with unwinding descriptors"),
-  cl::init(false));
-
-
 ARMException::ARMException(AsmPrinter *A)
   : DwarfException(A) {}
 
@@ -74,25 +68,23 @@ void ARMException::endFunction(const MachineFunction *) {
     Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
                                                   Asm->getFunctionNumber()));
 
-    if (EnableARMEHABIDescriptors) {
-      // Map all labels and get rid of any dead landing pads.
-      MMI->TidyLandingPads();
+    // Map all labels and get rid of any dead landing pads.
+    MMI->TidyLandingPads();
 
-      if (!MMI->getLandingPads().empty()) {
-        // Emit references to personality.
-        if (const Function * Personality =
-            MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
-          MCSymbol *PerSym = Asm->getSymbol(Personality);
-          Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
-          ATS.emitPersonality(PerSym);
-        }
+    if (!MMI->getLandingPads().empty()) {
+      // Emit references to personality.
+      if (const Function * Personality =
+          MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
+        MCSymbol *PerSym = Asm->getSymbol(Personality);
+        Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
+        ATS.emitPersonality(PerSym);
+      }
 
-        // Emit .handlerdata directive.
-        ATS.emitHandlerData();
+      // Emit .handlerdata directive.
+      ATS.emitHandlerData();
 
-        // Emit actual exception table
-        EmitExceptionTable();
-      }
+      // Emit actual exception table
+      EmitExceptionTable();
     }
   }