[clang] [llvm] [RISCV] Support RISC-V Profiles in -march option (PR #76357)

[Wang Pengcheng via cfe-commits]

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@@ -138,6 +150,8 @@ class RISCVSubtarget : public RISCVGenSubtargetInfo {
   /// initializeProperties().
   RISCVProcFamilyEnum getProcFamily() const { return RISCVProcFamily; }
 
+  RISCVProfileEnum getRISCVProfile() const { return RISCVProfile; }
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wangpc-pp wrote:

It depends on whether we need to know profile info in backend.
Currently we needn't, but I think it can be useful.

https://github.com/llvm/llvm-project/pull/76357
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