[llvm] [FuncSpec] Only compute Latency bonus when necessary (PR #113159)

[Alexandros Lamprineas via llvm-commits]

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@@ -97,21 +98,29 @@ class FunctionSpecializationTest : public testing::Test {
                                GetAC);
   }
 
-  Bonus getInstCost(Instruction &I, bool SizeOnly = false) {
+  Cost getInstCodeSize(Instruction &I, bool SizeOnly = false) {
     auto &TTI = FAM.getResult<TargetIRAnalysis>(*I.getFunction());
-    auto &BFI = FAM.getResult<BlockFrequencyAnalysis>(*I.getFunction());
 
     Cost CodeSize =
         TTI.getInstructionCost(&I, TargetTransformInfo::TCK_CodeSize);
 
-    Cost Latency =
-        SizeOnly
-            ? 0
-            : BFI.getBlockFreq(I.getParent()).getFrequency() /
-                  BFI.getEntryFreq().getFrequency() *
-                  TTI.getInstructionCost(&I, TargetTransformInfo::TCK_Latency);
+    if (!SizeOnly)
+      Instructions.push_back(&I);
 
-    return {CodeSize, Latency};
+    return CodeSize;
+  }
+
+  Cost getLatency(Function *F) {
+    auto &TTI = FAM.getResult<TargetIRAnalysis>(*F);
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labrinea wrote:

s/getLatency/getLatencySavings

https://github.com/llvm/llvm-project/pull/113159