[llvm-branch-commits] [llvm] [NVPTX] add support for encoding PTX registers for DWARF (PR #109495)

[William G Hatch via llvm-branch-commits]

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@@ -141,3 +142,47 @@ NVPTXRegisterInfo::getFrameLocalRegister(const MachineFunction &MF) const {
       static_cast<const NVPTXTargetMachine &>(MF.getTarget());
   return TM.is64Bit() ? NVPTX::VRFrameLocal64 : NVPTX::VRFrameLocal32;
 }
+
+void NVPTXRegisterInfo::clearDebugRegisterMap() const {
+  debugRegisterMap.clear();
+}
+
+static uint64_t encodeRegisterForDwarf(std::string registerName) {
+  if (registerName.length() > 8) {
+    // The name is more than 8 characters long, and so won't fit into 64 bits.
+    return 0;
+  }
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willghatch wrote:

I believe that the longest register name prefix in use is 4 characters, leaving 4 more characters for the decimal number, meaning 10k registers.  So it could just be an error, and probably should.  10k registers ought to be enough for anyone.

https://github.com/llvm/llvm-project/pull/109495