[llvm] Expanding the Histogram Intrinsic (PR #127399)

[Paschalis Mpeis via llvm-commits]

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@@ -8658,14 +8658,16 @@ VPRecipeBuilder::tryToWidenHistogram(const HistogramInfo *HI,
                                      ArrayRef<VPValue *> Operands) {
   // FIXME: Support other operations.
   unsigned Opcode = HI->Update->getOpcode();
-  assert((Opcode == Instruction::Add || Opcode == Instruction::Sub) &&
-         "Histogram update operation must be an Add or Sub");
+  assert(VPHistogramRecipe::isLegalUpdateInstruction(HI->Update) &&
+         "Found Ilegal update instruction for histogram");
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paschalis-mpeis wrote:

nit: 
```suggestion
         "Found Illegal update instruction for histogram");
```



https://github.com/llvm/llvm-project/pull/127399