bolt/test/runtime/X86/asm-dump.c

   1 /**
   2  ** Test for asm-dump functionality.
   3  *
   4  * REQUIRES: x86_64-linux,bolt-runtime
   5  *
   6  * Compile the source
   7  * RUN: %clang -fPIC %s -o %t.exe -Wl,-q
   8  *
   9  * Profile collection: instrument the binary
  10  * RUN: llvm-bolt %t.exe --instrument --instrumentation-file=%t.fdata -o \
  11  * RUN:   %t.instr
  12  *
  13  * Profile collection: run instrumented binary (and capture output)
  14  * RUN: %t.instr > %t.result
  15  *
  16  * Run BOLT with asm-dump
  17  * RUN: llvm-bolt %t.exe -p %t.fdata --funcs=main --asm-dump=%t -o %t.null \
  18  * RUN:   | FileCheck %s --check-prefix=CHECK-BOLT
  19  *
  20  * Check asm file contents
  21  * RUN: cat %t/main.s | FileCheck %s --check-prefix=CHECK-FILE
  22  *
  23  * Now check if asm-dump file can be consumed by BOLT infra
  24  * Strip dot from compiler-local symbols:
  25  * RUN: sed -i 's/\.L/L/g' %t/main.s
  26  *
  27  * Recompile the asm file into objfile
  28  * RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %t/main.s -o %t.o
  29  *
  30  * Reconstruct fdata
  31  * RUN: link_fdata %t/main.s %t.o %t.fdata.reconst
  32  *
  33  * XXX: reenable once dumping data is supported
  34  * Check if reoptimized file produces the same results
  35  * dontrun: %t.exe.reopt > %t.result.reopt
  36  * dontrun: cmp %t.result %t.result.reopt
  37  *
  38  * Delete our BB symbols so BOLT doesn't mark them as entry points
  39  * RUN: llvm-strip --strip-unneeded %t.o
  40  *
  41  * Recompile the binary
  42  * RUN: %clang -fPIC %t.o -o %t.exe.reopt -Wl,-q
  43  *
  44  * Finally consume reoptimized file with reconstructed fdata
  45  * RUN: llvm-bolt %t.exe.reopt -p %t.fdata.reconst -o %t.null \
  46  * RUN:   | FileCheck %s --check-prefix=CHECK-REOPT
  47  *
  48  * CHECK-BOLT: BOLT-INFO: Dumping function assembly to {{.*}}/main.s
  49  *
  50  * CHECK-FILE:      .globl main
  51  * CHECK-FILE-NEXT: .type main, %function
  52  * CHECK-FILE-NEXT: main:
  53  * CHECK-FILE-NEXT: # FDATA: 0 [unknown] 0 1 main 0 0 1
  54  * CHECK-FILE-NEXT: .cfi_startproc
  55  * CHECK-FILE-NEXT: .LBB{{.*}}:
  56  * CHECK-FILE:      .cfi_def_cfa_offset 16
  57  * CHECK-FILE:      leaq  {{.*}}(%rip)
  58  * CHECK-FILE:      callq puts@PLT
  59  * CHECK-FILE:      .cfi_endproc
  60  * CHECK-FILE-NEXT: .size main, .-main
  61  * CHECK-FILE:      .section .rodata
  62  *
  63  * CHECK-REOPT: BOLT-INFO: 1 out of {{.*}} functions in the binary {{.*}} have
  64  * CHECK-REOPT: non-empty execution profile
  65  */
  66 #include <stdio.h>
  67 #include <string.h>
  68
  69 int main(int argc, char* argv[]) {
  70   for (int I = 0; I < 10; I++) {
  71     if (I != 9)
  72       continue;
  73     if (argc > 1 &&
  74         strncmp(argv[1], "--help", strlen("--help")) == 0) {
  75       puts("Help message\n");
  76     } else {
  77       puts("Hello, World!\n");
  78     }
  79   }
  80   return 0;
  81 }