forked from OSchip/llvm-project
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
// RUN: %clang_profgen -mllvm --enable-value-profiling=true -mllvm -vp-static-alloc=true -mllvm -vp-counters-per-site=3 -O2 -o %t %s
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// RUN: %run %t %t.profraw
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// RUN: llvm-profdata merge -o %t.profdata %t.profraw
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// RUN: llvm-profdata show --all-functions --counts --ic-targets %t.profdata > %t.profdump
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// RUN: FileCheck --input-file %t.profdump %s --check-prefix=FOO
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// RUN: FileCheck --input-file %t.profdump %s --check-prefix=BAR
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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int __llvm_profile_runtime = 0;
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int __llvm_profile_write_file();
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void __llvm_profile_reset_counters(void);
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int __llvm_profile_merge_from_buffer(const char *, uint64_t);
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void __llvm_profile_set_filename(const char *);
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struct __llvm_profile_data;
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struct ValueProfData;
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void lprofMergeValueProfData(struct ValueProfData *, struct __llvm_profile_data *);
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/* Force the vp merger module to be linked in. */
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void *Dummy = &lprofMergeValueProfData;
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void callee1() {}
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void callee2() {}
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void callee3() {}
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typedef void (*FP)(void);
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FP Fps[3] = {callee1, callee2, callee3};
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void foo(int N) {
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int I, J;
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for (I = 0; I < 3; I++)
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for (J = 0; J < I * 2 + 1; J++)
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Fps[I]();
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if (N < 2)
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return;
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for (I = 0; I < 3; I++)
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for (J = 0; J < I * 2 + 1; J++)
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Fps[2 - I]();
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}
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/* This function is not profiled */
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void bar(void) {
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int I;
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for (I = 0; I < 20; I++)
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Fps[I % 3]();
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}
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int main(int argc, const char *argv[]) {
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int i;
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if (argc < 2)
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return 1;
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const char *FileN = argv[1];
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__llvm_profile_set_filename(FileN);
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/* Start profiling. */
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__llvm_profile_reset_counters();
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foo(1);
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/* End profiling by freezing counters and
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* dump them to the file. */
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if (__llvm_profile_write_file())
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return 1;
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/* Read profile data into buffer. */
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FILE *File = fopen(FileN, "r");
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if (!File)
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return 1;
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fseek(File, 0, SEEK_END);
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uint64_t Size = ftell(File);
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fseek(File, 0, SEEK_SET);
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char *Buffer = (char *)malloc(Size);
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if (Size != fread(Buffer, 1, Size, File))
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return 1;
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fclose(File);
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/* Its profile will be discarded. */
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for (i = 0; i < 10; i++)
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bar();
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/* Start profiling again and merge in previously
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saved counters in buffer. */
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__llvm_profile_reset_counters();
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__llvm_profile_merge_from_buffer(Buffer, Size);
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foo(2);
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/* End profiling. */
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truncate(FileN, 0);
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if (__llvm_profile_write_file())
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return 1;
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/* Its profile will be discarded. */
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bar();
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return 0;
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}
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// FOO-LABEL: foo:
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// FOO: Indirect Target Results:
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// FOO-NEXT: [ 0, callee3, 10 ]
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// FOO-NEXT: [ 0, callee2, 6 ]
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// FOO-NEXT: [ 0, callee1, 2 ]
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// FOO-NEXT: [ 1, callee1, 5 ]
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// FOO-NEXT: [ 1, callee2, 3 ]
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// FOO-NEXT: [ 1, callee3, 1 ]
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// BAR-LABEL: bar:
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// BAR: [ 0, callee1, 0 ]
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// BAR-NEXT: [ 0, callee2, 0 ]
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// BAR-NEXT: [ 0, callee3, 0 ]
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