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[LangRef] inline asm: the instructions are treated opaquely #157080

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[LangRef] inline asm: the instructions are treated opaquely #157080

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[LangRef] inline asm: the template string is treated opaquely
RalfJung Sep 5, 2025
e5d04c8
explicitly mention self-modifying code
RalfJung Sep 15, 2025
077349a
only forbid correctness-critical analyses from inspecting the templat…
RalfJung Oct 3, 2025
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5 changes: 4 additions & 1 deletion llvm/docs/LangRef.rst
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Expand Up @@ -5227,7 +5227,10 @@ represents the inline assembler as a template string (containing the
instructions to emit), a list of operand constraints (stored as a string), a
flag that indicates whether or not the inline asm expression has side effects,
and a flag indicating whether the function containing the asm needs to align its
stack conservatively.
stack conservatively. The compiler's understanding of the semantics of the
expression comes only from the list of operand constraints and the flags -- not
the contents of the template string. In particular, no optimizations or analyses
will be performed based on the contents of that string.

The template string supports argument substitution of the operands using "``$``"
followed by a number, to indicate substitution of the given register/memory
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