jlebar added inline comments.
================
Comment at: lib/Driver/Tools.cpp:10707
@@ +10706,3 @@
+ // ptxas does not accept -g option if optimization is enabled, so we ignore
+ // compiler's -O* options if we want debug info.
+ CmdArgs.push_back("-g");
----------------
I think this is would be very surprising to users. -g does not usually have a
large performance impact, so -O2 -g does not generally mean "generate slow
code," as far as I know. I'm concerned that this will result in people
accidentally compiling with ptxas -O0 (which is why I didn't do it like this to
begin with).
Can we accomplish this in a more explicit way?
http://reviews.llvm.org/D17111
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