[PATCH] D14407: [WinEH] Mark funclet entries and exits as clobbering all registers

[Reid Kleckner via llvm-commits]

rnk created this revision.
rnk added reviewers: MatzeB, qcolombet, JosephTremoulet, majnemer.
rnk added a subscriber: llvm-commits.
Herald added a subscriber: MatzeB.

In this implementation, LiveIntervalAnalysis invents a few register
masks on basic block boundaries that preserve no registers. The nice
thing about this is that it prevents the prologue inserter from thinking
it needs to spill all XMM CSRs, because it doesn't see any explicit
physreg defs in the MI.

http://reviews.llvm.org/D14407

Files:
  include/llvm/Target/TargetRegisterInfo.h
  lib/CodeGen/LiveIntervalAnalysis.cpp
  lib/Target/ARM/ARMBaseRegisterInfo.h
  lib/Target/PowerPC/PPCRegisterInfo.h
  lib/Target/X86/X86RegisterInfo.h
  test/CodeGen/X86/catchpad-regmask.ll
  test/CodeGen/X86/cleanuppad-large-codemodel.ll

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