K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2019-09-21T21:01:38.890431Z
K 7
svn:log
V 825
Pull in r371557 from upstream clang trunk (by Richard Smith):

  When evaluating a __builtin_constant_p conditional, always enter
  constant-folding mode regardless of the original evaluation mode.

  In order for this to be correct, we need to track whether we're
  checking for a potential constant expression or checking for
  undefined behavior separately from the evaluation mode enum, since we
  don't want to clobber those states when entering constant-folding
  mode.

This should fix "ld: error: undefined symbol: ix86_isa_flags" (and many
other symbol names) during the initial stages of the lang/gcc* ports.

The issue was that without optimization, the __builtin_constant_p()
expressions generated in gencondmd.c would emit references to global
variables that were undefined, such as ix86_isa_flags.

PR:		240629

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