[PATCH] D19688: Fixes PR27241 by enabling the X86 call frame optimization for 64-bit targets

[David Kreitzer via llvm-commits]

DavidKreitzer updated this revision to Diff 55595.
DavidKreitzer added a comment.

Thanks for the reviews, Reid and Hans!

I updated the test to check that the optimization works as expected for Darwin64, which means that it is allowed for routines that use a frame pointer and have no EH (so that the pushes don't require additional unwind info) but disallowed otherwise. The 32-bit test movtopush.ll could also use some Darwin specific testing. I can do that separately.

Reid, if you have any suggestions for how to find/fix broken unwinders prior to commit, I would be happy to try them.


http://reviews.llvm.org/D19688

Files:
  lib/Target/X86/X86CallFrameOptimization.cpp
  lib/Target/X86/X86InstrInfo.cpp
  test/CodeGen/X86/movtopush64.ll

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