[lld] [llvm] [Hexagon] Add support for decoding PLT symbols (PR #123425)

[Fangrui Song via llvm-commits]

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@@ -734,8 +734,44 @@ class HexagonMCInstrAnalysis : public MCInstrAnalysis {
     Target = Value;
     return true;
   }
+
+  uint32_t getValueFromMask(uint32_t Instruction, uint32_t Mask) const {
+    uint32_t Result = 0;
+    size_t Off = 0;
+    for (uint32_t Bit = 0; Bit != sizeof(uint32_t) * CHAR_BIT; ++Bit) {
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MaskRay wrote:

Is the value `(1u << llvm::popcount(Instruction & Mask)) - 1` ? 

If (Instruction & Mask) could be UINT32_MAX, 1u<<32 would trigger UB, but I suspect it would not happen here.

https://github.com/llvm/llvm-project/pull/123425