tree 95b5bd94fcca7e04296a39be17960b72ca64408d
parent 4acc2f29a278ff2a0a4d683dd6d706cc2f7123fd
author Melanie Blower <melanie.blower@intel.com> 1627574540 -0400
committer Melanie Blower <melanie.blower@intel.com> 1627574557 -0400

[clang][patch][FPEnv] Make initialization of C++ globals strictfp aware

@kpn pointed out that the global variable initialization functions didn't
have the "strictfp" metadata set correctly, and @rjmccall said that there
was buggy code in SetFPModel and StartFunction, this patch is to solve
those problems. When Sema creates a FunctionDecl, it sets the
FunctionDeclBits.UsesFPIntrin to "true" if the lexical FP settings
(i.e. a combination of command line options and #pragma float_control
settings) correspond to ConstrainedFP mode. That bit is used when CodeGen
starts codegen for a llvm function, and it translates into the
"strictfp" function attribute. See bugs.llvm.org/show_bug.cgi?id=44571

Reviewed By: Aaron Ballman

Differential Revision: https://reviews.llvm.org/D102343