maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/Transforms/LowerConstantIntrinsics
History
Nick Desaulniers 8c72749bd9 [LowerConstantIntrinsics] reuse isManifestLogic from ConstantFolding 
GlobalVariables are Constants, yet should not unconditionally be
considered true for __builtin_constant_p.

Via the LangRef
https://llvm.org/docs/LangRef.html#llvm-is-constant-intrinsic:

    This intrinsic generates no code. If its argument is known to be a
    manifest compile-time constant value, then the intrinsic will be
    converted to a constant true value. Otherwise, it will be converted
    to a constant false value.

    In particular, note that if the argument is a constant expression
    which refers to a global (the address of which _is_ a constant, but
    not manifest during the compile), then the intrinsic evaluates to
    false.

Move isManifestConstant from ConstantFolding to be a method of
Constant so that we can reuse the same logic in
LowerConstantIntrinsics.

pr/41459

Reviewed By: rsmith, george.burgess.iv

Differential Revision: https://reviews.llvm.org/D102367
 		2021-05-14 15:35:21 -07:00
..
constant-intrinsics.ll [LowerConstantIntrinsics] reuse isManifestLogic from ConstantFolding 2021-05-14 15:35:21 -07:00
crash-on-large-allocas.ll
…
objectsize_basic.ll
…