[llvm] [AMDGPU] MCExpr printing helper with KnownBits support (PR #95951)

[Janek van Oirschot via llvm-commits]

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@@ -303,3 +305,360 @@ const AMDGPUMCExpr *AMDGPUMCExpr::createOccupancy(unsigned InitOcc,
                  CreateExpr(InitOcc), NumSGPRs, NumVGPRs},
                 Ctx);
 }
+
+static KnownBits fromOptionalToKnownBits(std::optional<bool> CompareResult) {
+  const unsigned BitWidth = 64;
+  const APInt True(BitWidth, 1, /*isSigned=*/false);
+  const APInt False(BitWidth, 0, /*isSigned=*/false);
+  if (CompareResult) {
+    return *CompareResult ? KnownBits::makeConstant(True)
+                          : KnownBits::makeConstant(False);
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JanekvO wrote:

`KnownBits::makeConstant` doesn't support direct boolean values as arguments, unfortunately

https://github.com/llvm/llvm-project/pull/95951