The concept of strict floating point nodes was added into LLVM in https://reviews.llvm.org/D55506.
This is the third follow-up patch to add constraint fp support about exception part for PowerPC target.
Unit tests: pass. 61907 tests passed, 0 failed and 781 were skipped.
clang-format: fail. Please format your changes with clang-format by running git-clang-format HEAD^ or applying this patch.