Optimize local func calls to not emit nop for TOC restoration.
Patch by Adhemerval Zanella.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164138 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index f1a673c..6b93d94 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -2808,6 +2808,14 @@
return CallOpc;
}
+static
+bool isLocalCall(const SDValue &Callee)
+{
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
+ return !G->getGlobal()->isDeclaration();
+ return false;
+}
+
SDValue
PPCTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
CallingConv::ID CallConv, bool isVarArg,
@@ -2916,8 +2924,8 @@
// from allocating it), resulting in an additional register being
// allocated and an unnecessary move instruction being generated.
needsTOCRestore = true;
- } else if (CallOpc == PPCISD::CALL_SVR4) {
- // Otherwise insert NOP.
+ } else if ((CallOpc == PPCISD::CALL_SVR4) && !isLocalCall(Callee)) {
+ // Otherwise insert NOP for non-local calls.
CallOpc = PPCISD::CALL_NOP_SVR4;
}
}