Wei Mi 93d80a543f [SampleFDO] Add use-sample-profile function attribute. ... When sampleFDO is enabled, people may expect they can use -fno-profile-sample-use to opt-out using sample profile for a certain file. That could be either for debugging purpose or for performance tuning purpose. However, when thinlto is enabled, if a function in file A compiled with -fno-profile-sample-use is imported to another file B compiled with -fprofile-sample-use, the inlined copy of the function in file B may still get its profile annotated. The inconsistency may even introduce profile unused warning because if the target is not compiled with explicit debug information flag, the function in file A won't have its debug information enabled (debug information will be enabled implicitly only when -fprofile-sample-use is used). After it is imported into file B which is compiled with -fprofile-sample-use, profile annotation for the outline copy of the function will fail because the function has no debug information, and that will trigger profile unused warning. We add a new attribute use-sample-profile to control whether a function will use its sample profile no matter for its outline or inline copies. That will make the behavior of -fno-profile-sample-use consistent. Differential Revision: https://reviews.llvm.org/D79959		2020-06-02 17:23:17 -07:00
..
ARM
Resolution/X86	[SampleFDO] Add use-sample-profile function attribute.	2020-06-02 17:23:17 -07:00
X86	Infer alignment of unmarked loads in IR/bitcode parsing.	2020-05-14 13:03:50 -07:00