re-enable direct calls, this should just be a performance boost
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22148 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/IA64/IA64ISelPattern.cpp b/lib/Target/IA64/IA64ISelPattern.cpp
index 1ea16cc..2e34b36 100644
--- a/lib/Target/IA64/IA64ISelPattern.cpp
+++ b/lib/Target/IA64/IA64ISelPattern.cpp
@@ -2151,16 +2151,13 @@
}
}
- /* XXX we want to re-enable direct branches! crippling them now
- * to stress-test indirect branches.:
- //build the right kind of call
+ // build the right kind of call. if we can branch directly, do so:
if (GlobalAddressSDNode *GASD =
dyn_cast<GlobalAddressSDNode>(N.getOperand(1)))
{
BuildMI(BB, IA64::BRCALL, 1).addGlobalAddress(GASD->getGlobal(),true);
IA64Lowering.restoreGP_SP_RP(BB);
- }
- ^^^^^^^^^^^^^ we want this code one day XXX */
+ } else
if (ExternalSymbolSDNode *ESSDN =
dyn_cast<ExternalSymbolSDNode>(N.getOperand(1)))
{ // FIXME : currently need this case for correctness, to avoid
@@ -2169,7 +2166,9 @@
.addExternalSymbol(ESSDN->getSymbol(), true);
IA64Lowering.restoreGP_SP_RP(BB);
}
- else {
+ else { // otherwise we need to get the function descriptor
+ // load the branch target (function)'s entry point and
+ // GP, then branch
Tmp1 = SelectExpr(N.getOperand(1));
unsigned targetEntryPoint=MakeReg(MVT::i64);