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Author SHA1 Message Date
Bill Wendling 0517508c00 Don't emit a warning with an input/output parameter. We assume the user knows what they're doing here. 
llvm-svn: 169059
 2012-11-30 23:46:56 +00:00
Bill Wendling 3c6591d6ea Don't warn if the input size is less than the register size. Also don't warn if 
the output size is greater than the register size. No truncation occurs with
those. Reword warning to make it clearer what's the problem is.

llvm-svn: 169054
 2012-11-30 23:18:12 +00:00
Bill Wendling 9d1ee1175d Recommit Eric's code to validate ASM string's constraints and modifiers. 
This code checks the ASM string to see if the output size is able to fit within
the variable specified as the output. For instance, scalar-to-vector conversions
may not really work. It's on by default, but can be turned off with a flag if
you think you know what you're doing.

This is placed under a flag ('-Wasm-operand-widths') and flag group ('-Wasm').

<rdar://problem/12284092>

llvm-svn: 166737
 2012-10-25 23:28:48 +00:00