forked from OSchip/llvm-project
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
// Test that misexpect detects mis-annotated switch statements for default case
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// RUN: llvm-profdata merge %S/Inputs/misexpect-switch-default.proftext -o %t.profdata
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// RUN: %clang_cc1 %s -O2 -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata -verify -Wmisexpect -debug-info-kind=line-tables-only
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int sum(int *buff, int size);
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int random_sample(int *buff, int size);
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int rand();
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void init_arry();
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const int inner_loop = 1000;
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const int outer_loop = 20;
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const int arry_size = 25;
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int arry[arry_size] = {0};
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int main() {
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init_arry();
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int val = 0;
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int j;
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for (j = 0; j < outer_loop * inner_loop; ++j) {
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unsigned condition = rand() % 5;
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switch (__builtin_expect(condition, 6)) { // expected-warning-re {{Potential performance regression from use of __builtin_expect(): Annotation was correct on {{.+}}% ({{[0-9]+ / [0-9]+}}) of profiled executions.}}
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case 0:
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val += sum(arry, arry_size);
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break;
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case 1:
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case 2:
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case 3:
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break;
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case 4:
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val += random_sample(arry, arry_size);
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break;
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default:
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__builtin_unreachable();
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} // end switch
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} // end outer_loop
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return 0;
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}
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