[PATCH] D17111: [CUDA] pass debug options to ptxas.

[Eric Christopher via cfe-commits]

echristo 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");
----------------
jlebar wrote:
> 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?
Other than warning I'm not sure what we can do, we could do that instead and make everyone use O0 that wants debug info in their ptx?


http://reviews.llvm.org/D17111