[llvm-commits] [patch] fix PR 2682

[Rafael Espindola]

The attached patch fixes 2682. I am sending it for review before
committing because it is mostly a hack.

GCC uses optimization information to emit warnings. In this particular
case, it assumes that by the time __builtin_prefetch is expanded,
__builtin_constant_p will have been folded.

This is not the case in llvm-gcc, since pass_fold_builtins is
disabled. This patch enables just the __builtin_constant_p case in it.
OK for trunk? I was not able to test with a full bootstrap since
llvm-gcc bootstrap is broken on linux x86-64 at 55175.

Cheers,
-- 
Rafael Avila de Espindola

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