if (Fn.hasAddressTaken())
return false;
+ // Don't touch naked functions. The assembly might be using an argument, or
+ // otherwise rely on the frame layout in a way that this analysis will not
+ // see.
+ if (Fn.hasFnAttribute(Attribute::Naked)) {
+ return false;
+ }
+
// Okay, we know we can transform this function if safe. Scan its body
// looking for calls marked musttail or calls to llvm.vastart.
for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) {
if (Fn.hasLocalLinkage() && !Fn.getFunctionType()->isVarArg())
return false;
+ // Don't touch naked functions. The assembly might be using an argument, or
+ // otherwise rely on the frame layout in a way that this analysis will not
+ // see.
+ if (Fn.hasFnAttribute(Attribute::Naked))
+ return false;
+
if (Fn.use_empty())
return false;
return;
}
+ // Don't touch naked functions. The assembly might be using an argument, or
+ // otherwise rely on the frame layout in a way that this analysis will not
+ // see.
+ if (F.hasFnAttribute(Attribute::Naked)) {
+ MarkLive(F);
+ return;
+ }
+
unsigned RetCount = NumRetVals(&F);
// Assume all return values are dead
typedef SmallVector<Liveness, 5> RetVals;