[llvm-branch-commits] [IRTranslator] Handle ptrtoaddr (PR #139601)

[Alexander Richardson via llvm-branch-commits]

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@@ -1583,6 +1583,26 @@ bool IRTranslator::translateCast(unsigned Opcode, const User &U,
   return true;
 }
 
+bool IRTranslator::translatePtrToAddr(const User &U,
+                                      MachineIRBuilder &MIRBuilder) {
+  if (containsBF16Type(U))
+    return false;
+
+  uint32_t Flags = 0;
+  if (const Instruction *I = dyn_cast<Instruction>(&U))
+    Flags = MachineInstr::copyFlagsFromInstruction(*I);
+
+  Register Op = getOrCreateVReg(*U.getOperand(0));
+  Type *PtrTy = U.getOperand(0)->getType();
+  LLT AddrTy = getLLTForType(*DL->getIndexType(PtrTy), *DL);
+  auto IntPtrTy = getLLTForType(*DL->getIntPtrType(PtrTy), *DL);
+  auto PtrToInt = MIRBuilder.buildPtrToInt(IntPtrTy, Op);
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arichardson wrote:

I tried this in https://github.com/llvm/llvm-project/pull/140300 but it seems to me that adding this node introduces a lot of complexity for no real gain. I don't think we track provenance at the MIR level, so having the dedicated node probably doesn't enable much optimization over G_PTRTOINT+G_TRUNC?

https://github.com/llvm/llvm-project/pull/139601