af58684f27
Add two options, `-fprofile-function-groups=N` and `-fprofile-selected-function-group=i` used to partition functions into `N` groups and only instrument the functions in group `i`. Similar options were added to xray in https://reviews.llvm.org/D87953 and the goal is the same; to reduce instrumented size overhead by spreading the overhead across multiple builds. Raw profiles from different groups can be added like normal using the `llvm-profdata merge` command. Reviewed By: ianlevesque Differential Revision: https://reviews.llvm.org/D129594
25 lines
879 B
C
25 lines
879 B
C
// RUN: %clang -fprofile-generate -fprofile-function-groups=3 -fprofile-selected-function-group=0 -emit-llvm -S %s -o - | FileCheck %s --check-prefixes=CHECK,SELECT0
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// RUN: %clang -fprofile-generate -fprofile-function-groups=3 -fprofile-selected-function-group=1 -emit-llvm -S %s -o - | FileCheck %s --check-prefixes=CHECK,SELECT1
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// RUN: %clang -fprofile-generate -fprofile-function-groups=3 -fprofile-selected-function-group=2 -emit-llvm -S %s -o - | FileCheck %s --check-prefixes=CHECK,SELECT2
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// Group 0
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// SELECT0-NOT: noprofile
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// SELECT1: noprofile
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// SELECT2: noprofile
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// CHECK: define {{.*}} @hoo()
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void hoo() {}
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// Group 1
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// SELECT0: noprofile
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// SELECT1-NOT: noprofile
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// SELECT2: noprofile
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// CHECK: define {{.*}} @goo()
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void goo() {}
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// Group 2
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// SELECT0: noprofile
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// SELECT1: noprofile
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// SELECT2-NOT: noprofile
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// CHECK: define {{.*}} @boo()
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void boo() {}
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