[flang] Merge pull request flang-compiler/f18#316 from flang-compiler/pmk-expr-walk
authorPeter Klausler <35819229+klausler@users.noreply.github.com>
Thu, 7 Mar 2019 00:56:07 +0000 (16:56 -0800)
committerGitHub <noreply@github.com>
Thu, 7 Mar 2019 00:56:07 +0000 (16:56 -0800)
commitc1970da2396547566db794ffb5a05d3e9dd2755d
treec51c66eec33918126e247a911717704dde111185
parent18e436afc4b380687df6cfb7261733fc04a19675
[flang] Merge pull request flang-compiler/f18#316 from flang-compiler/pmk-expr-walk

Add Expression traversal framework, use it to reimplement IsConstantE…

Original-commit: flang-compiler/f18@90cd33adcb6c420d0791a094c456832e4d78d548
Reviewed-on: https://github.com/flang-compiler/f18/pull/316