[llvm] [AsmPrinter] Reduce AsmPrinterHandlers virt. fn calls (PR #96785)

[Jameson Nash via llvm-commits]

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@@ -382,13 +382,10 @@ class AsmPrinterHandlerTest : public AsmPrinterFixtureBase {
   public:
     TestHandler(AsmPrinterHandlerTest &Test) : Test(Test) {}
     virtual ~TestHandler() {}
-    virtual void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
     virtual void beginModule(Module *M) override { Test.BeginCount++; }
     virtual void endModule() override { Test.EndCount++; }
     virtual void beginFunction(const MachineFunction *MF) override {}
     virtual void endFunction(const MachineFunction *MF) override {}
-    virtual void beginInstruction(const MachineInstr *MI) override {}
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vtjnash wrote:

Instruction count may only have a weak correlation with wall time though, since instructions take vastly different times to retire, while your comment above seemed to show that this PR made everything measured at 0.5% slower (https://github.com/llvm/llvm-project/pull/96785#issuecomment-2193989698) if I am reading that right. I assume that is well within the noise factor, so not a blocker from me.

`addDebugHandler` looks good for me, but might need a new test here?

https://github.com/llvm/llvm-project/pull/96785