[llvm] [RISCV] Handle codegen for Big Endian (PR #172668)

[Craig Topper via llvm-commits]

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@@ -220,6 +222,7 @@ class RISCVSubtarget : public RISCVGenSubtargetInfo {
   }
 
   bool is64Bit() const { return IsRV64; }
+  bool isLittleEndian() const { return TargetTriple.isLittleEndian(); }
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topperc wrote:

Can we cache this in a bool in the constructor?

https://github.com/llvm/llvm-project/pull/172668