Correct PowerPC strictfp tests to follow the rules documented in the LangRef:
https://llvm.org/docs/LangRef.html#constrained-floating-point-intrinsics
Mostly these tests just needed the strictfp attribute on function
definitions. I've also removed the strictfp attribute from uses
of the constrained intrinsics because it comes by default since
D154991, but I only did this in tests I was changing anyway.
I have removed attributes added to declare lines of intrinsics. The
attributes of intrinsics cannot be changed in a test so I eliminated
attempts to do so.
Test changes verified with D146845.
InstCombine should have taken care of this, but I think
this is more useful in the future when the expansion
tries to handle multiple cases at a time with fcmp.
x87 looks worse to me but the only thing I know about it is that
I aggressively do not care about it.
https://reviews.llvm.org/D143198
Power ISA 3.0 introduced new 'test data class' instructions, which
accept flags for: NaN/Infinity/Zero/Denormal. This instruction can be
used to implement custom lowering for llvm.is.fpclass, but some extra
bits provided by the intrinsic are missing (normal and QNaN/SNaN).
For those categories not natively supported, this patch uses a two-way
or three-way combination to implement correct behavior.
Reviewed By: sepavloff, shchenz
Differential Revision: https://reviews.llvm.org/D140381
PowerPC supports `ppc_fp128`, which is not an IEEE floating point
type. The generic lowering of llvm.is_fpclass could not handle it
properly. This change extends the generic lowering code to
support `ppc_fp128`.
The change was tested on emulator using runtime tests from
https://reviews.llvm.org/D112933 and the patch for clang
https://reviews.llvm.org/D112932.
Differential Revision: https://reviews.llvm.org/D113908
