7a6c89427c
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
33 lines
2.9 KiB
LLVM
33 lines
2.9 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/syntax.prof 2>&1 | FileCheck -check-prefix=NO-DEBUG %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=missing.prof 2>&1 | FileCheck -check-prefix=MISSING-FILE %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_fn_header.prof 2>&1 | FileCheck -check-prefix=BAD-FN-HEADER %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_sample_line.prof 2>&1 | FileCheck -check-prefix=BAD-SAMPLE-LINE %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_line_values.prof 2>&1 | FileCheck -check-prefix=BAD-LINE-VALUES %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_discriminator_value.prof 2>&1 | FileCheck -check-prefix=BAD-DISCRIMINATOR-VALUE %s
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; RUN: not opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_samples.prof 2>&1 | FileCheck -check-prefix=BAD-SAMPLES %s
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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/bad_mangle.prof 2>&1 >/dev/null
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/syntax.prof 2>&1 | FileCheck -check-prefix=NO-DEBUG %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=missing.prof 2>&1 | FileCheck -check-prefix=MISSING-FILE %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_fn_header.prof 2>&1 | FileCheck -check-prefix=BAD-FN-HEADER %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_sample_line.prof 2>&1 | FileCheck -check-prefix=BAD-SAMPLE-LINE %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_line_values.prof 2>&1 | FileCheck -check-prefix=BAD-LINE-VALUES %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_discriminator_value.prof 2>&1 | FileCheck -check-prefix=BAD-DISCRIMINATOR-VALUE %s
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; RUN: not opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_samples.prof 2>&1 | FileCheck -check-prefix=BAD-SAMPLES %s
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/bad_mangle.prof 2>&1 >/dev/null
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define void @empty() #0 {
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entry:
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ret void
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}
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attributes #0 = { "use-sample-profile" }
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; NO-DEBUG: warning: No debug information found in function empty: Function profile not used
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; MISSING-FILE: missing.prof: Could not open profile:
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; BAD-FN-HEADER: error: {{.*}}bad_fn_header.prof: Could not open profile: Unrecognized sample profile encoding format
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; BAD-SAMPLE-LINE: error: {{.*}}bad_sample_line.prof:3: Expected 'NUM[.NUM]: NUM[ mangled_name:NUM]*', found 1: BAD
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; BAD-LINE-VALUES: error: {{.*}}bad_line_values.prof:2: Expected 'mangled_name:NUM:NUM', found -1: 10
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; BAD-DISCRIMINATOR-VALUE: error: {{.*}}bad_discriminator_value.prof:2: Expected 'NUM[.NUM]: NUM[ mangled_name:NUM]*', found 1.-3: 10
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; BAD-SAMPLES: error: {{.*}}bad_samples.prof:2: Expected 'NUM[.NUM]: NUM[ mangled_name:NUM]*', found 1.3: -10
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