[llvm] [AMDGPU] Fix .Lfunc_end label placement (PR #127549)

[Matt Arsenault via llvm-commits]

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@@ -90,6 +91,24 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAMDGPUAsmPrinter() {
                                      createAMDGPUAsmPrinterPass);
 }
 
+namespace {
+class AMDGPUAsmPrinterHandler : public AsmPrinterHandler {
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arsenm wrote:

I don't understand why we need this fancy handler thing, I don't see other targets using it 

https://github.com/llvm/llvm-project/pull/127549