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

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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,cpp -- clang/test/CodeGen/RISCV/bitint.c clang/lib/CodeGen/Targets/RISCV.cpp clang/test/CodeGen/ext-int-cc.c
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/Targets/RISCV.cpp b/clang/lib/CodeGen/Targets/RISCV.cpp
index fb95880af..e2caff85c 100644
--- a/clang/lib/CodeGen/Targets/RISCV.cpp
+++ b/clang/lib/CodeGen/Targets/RISCV.cpp
@@ -683,7 +683,7 @@ ABIArgInfo RISCVABIInfo::classifyArgumentType(QualType Ty, bool IsFixed,
     if (const auto *EIT = Ty->getAs<BitIntType>()) {
       // FIXME: Maybe we should treat 32 as a special case and wait for
       // the SPEC to decide.
-      if (EIT->getNumBits() <= 2*XLen)
+      if (EIT->getNumBits() <= 2 * XLen)
         return ABIArgInfo::getExtend(Ty, CGT.ConvertType(Ty));
       if (EIT->getNumBits() > 128 ||
           (!getContext().getTargetInfo().hasInt128Type() &&

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