derek.holloway
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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* Checks that BOLT correctly processes a user-provided function list file,
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* reorder functions according to this list, update hot_start and hot_end
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* symbols and insert a function to perform hot text mapping during program
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* startup.
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*/
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#include <stdio.h>
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int foo(int x) { return x + 1; }
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int fib(int x) {
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if (x < 2)
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return x;
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return fib(x - 1) + fib(x - 2);
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}
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int bar(int x) { return x - 1; }
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int main(int argc, char **argv) {
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printf("fib(%d) = %d\n", argc, fib(argc));
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return 0;
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}
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/*
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REQUIRES: system-linux,bolt-runtime
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RUN: %clang %cflags -no-pie %s -o %t.exe -Wl,-q
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RUN: llvm-bolt %t.exe --relocs=1 --lite --reorder-functions=user \
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RUN: --hugify --function-order=%p/Inputs/user_func_order.txt -o %t
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RUN: llvm-bolt %t.exe --relocs=1 --lite --reorder-functions=user \
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RUN: --function-order=%p/Inputs/user_func_order.txt -o %t.nohugify
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RUN: llvm-nm --numeric-sort --print-armap %t | \
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RUN: FileCheck %s -check-prefix=CHECK-NM
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RUN: %t 1 2 3 | FileCheck %s -check-prefix=CHECK-OUTPUT
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RUN: llvm-nm --numeric-sort --print-armap %t.nohugify | \
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RUN: FileCheck %s -check-prefix=CHECK-NM-NOHUGIFY
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RUN: %t.nohugify 1 2 3 | FileCheck %s -check-prefix=CHECK-OUTPUT-NOHUGIFY
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CHECK-NM: W __hot_start
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CHECK-NM: T main
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CHECK-NM-NEXT: T fib
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CHECK-NM-NEXT: W __hot_end
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CHECK-NM: t __bolt_hugify_start_program
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CHECK-NM-NEXT: W __bolt_runtime_start
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CHECK-NM-NOHUGIFY: W __hot_start
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CHECK-NM-NOHUGIFY: T main
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CHECK-NM-NOHUGIFY-NEXT: T fib
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CHECK-NM-NOHUGIFY-NEXT: W __hot_end
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CHECK-OUTPUT: fib(4) = 3
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CHECK-OUTPUT-NOHUGIFY: fib(4) = 3
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*/
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