[clang] [clang][RISCV] support BITINT with mixed-type (PR #156592)

[Craig Topper via cfe-commits]

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@@ -696,6 +693,11 @@ ABIArgInfo RISCVABIInfo::classifyArgumentType(QualType Ty, bool IsFixed,
             /*ByVal=*/false);
     }
 
+    // All integral types are promoted to XLen width
+    if (Size < XLen && Ty->isIntegralOrEnumerationType()) {
+      return extendType(Ty, CGT.ConvertType(Ty));
+    }
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topperc wrote:

Drop curly braces

https://github.com/llvm/llvm-project/pull/156592