[all-commits] [llvm/llvm-project] 1fbbf4: [clang][bytecode] Pass (float) BitWidth to DoBitCa...

[Timm Baeder via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1fbbf4c418bc4945839a70fe2849cbe6fbcc3d66
      https://github.com/llvm/llvm-project/commit/1fbbf4c418bc4945839a70fe2849cbe6fbcc3d66
  Author: Timm Baeder <tbaeder at redhat.com>
  Date:   2024-12-08 (Sun, 08 Dec 2024)

  Changed paths:
    M clang/lib/AST/ByteCode/BitcastBuffer.h
    M clang/lib/AST/ByteCode/Interp.h
    M clang/lib/AST/ByteCode/InterpBuiltinBitCast.cpp
    M clang/lib/AST/ByteCode/InterpBuiltinBitCast.h
    M clang/test/AST/ByteCode/builtin-bit-cast-long-double.cpp

  Log Message:
  -----------
  [clang][bytecode] Pass (float) BitWidth to DoBitCast (#119119)

In certain cases (i.e. long double on x86), the bit with we get from the
floating point semantics is different than the type size we compute for
the BitCast instruction. Pass this along to DoBitCast, so in there we
can check only the relevant bits for being initialized.

This also fixes a weirdness we still had in DoBitCast.



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