[PATCH] Adding option -fno-inline-asm to disallow inline asm

[Reid Kleckner]

In http://reviews.llvm.org/D6870#109616, @steven_wu wrote:

> - Update patch that AsmLabels are now disabled with -fno-gnu-inline-asm. This also means functions with asm-labels will also be reported as an error with -fno-gnu-inline-asm.


I wasn't suggesting that we reject function asm labels, I was suggesting that we reject variables marked as living in specific registers. Consider something like:

  register void *sp asm("esp");
  int main () {
    printf("sp: %p\n", sp);
  }

This code compiles down to read the esp register in main.

I think using asm labels to rename something is not inherently architecture specific and could be accepted even in the presence of -fno-inline-asm. What do you think?


http://reviews.llvm.org/D6870

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