[clang] [llvm] [HLSL][DXIL][SPIRV] QuadReadAcrossX intrinsic support (PR #184360)

[via cfe-commits]

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@@ -3095,6 +3098,34 @@ bool SPIRVInstructionSelector::selectWaveExclusiveScan(
   return true;
 }
 
+bool SPIRVInstructionSelector::selectQuadSwap(Register ResVReg,
+                                              SPIRVTypeInst ResType,
+                                              MachineInstr &I,
+                                              unsigned Direction) const {
+  assert(I.getNumOperands() == 3);
+  assert(I.getOperand(2).isReg());
+  MachineBasicBlock &BB = *I.getParent();
+  Register InputRegister = I.getOperand(2).getReg();
+  SPIRVTypeInst InputType = GR.getSPIRVTypeForVReg(InputRegister);
+
+  if (!InputType)
+    report_fatal_error("Input Type could not be determined.");
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kcloudy0717 wrote:

Removed.

https://github.com/llvm/llvm-project/pull/184360