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
29 lines
1.0 KiB
C
29 lines
1.0 KiB
C
// RUN: %clang_pgogen -fprofile-function-groups=3 -fprofile-selected-function-group=0 %s -o %t.0.out
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// RUN: %clang_pgogen -fprofile-function-groups=3 -fprofile-selected-function-group=1 %s -o %t.1.out
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// RUN: %clang_pgogen -fprofile-function-groups=3 -fprofile-selected-function-group=2 %s -o %t.2.out
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// RUN: env LLVM_PROFILE_FILE=%t.0.profraw %run %t.0.out
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// RUN: env LLVM_PROFILE_FILE=%t.1.profraw %run %t.1.out
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// RUN: env LLVM_PROFILE_FILE=%t.2.profraw %run %t.2.out
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// RUN: llvm-profdata merge -o %t.profdata %t.*.profraw
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// RUN: llvm-profdata show %t.profdata --all-functions | FileCheck %s
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int foo(int i) { return 4 * i + 1; }
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int bar(int i) { return 4 * i + 2; }
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int goo(int i) { return 4 * i + 3; }
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int main(int argc, char *argv[]) {
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foo(5);
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bar(6);
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goo(7);
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return 0;
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}
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// Even though we ran this code three times, we expect all counts to be one if
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// functions were partitioned into groups correctly.
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// CHECK: Counters: 1
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// CHECK: Counters: 1
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// CHECK: Counters: 1
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// CHECK: Counters: 1
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// CHECK: Total functions: 4
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