-Wunreachable-code: 'true' and 'false' should not be treated as configuration
macros

Clang should emit -Wunreachable-code warnings in C mode for code that's
unreachable because of a 'false' or '!true' condition.

rdar://31452734

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@299541 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 2c1528e18a33f31e3b639fa92adcb63117222b08)
2 files changed