[BOLT][TEST] Fix test failures on AArch64 builder

[Amir]

Summary

Address X86 tests failures on AArch64 builder:
https://lab.llvm.org/staging/#/builders/211/builds/82

Inputs fail to cross-compile due to a missing header:

/usr/include/stdio.h:27:10: fatal error: 'bits/libc-header-start.h' file not found
#include <bits/libc-header-start.h>

As inputs are linked with -nostdlib anyway, don't include stdio.h.

[yota9]

bolt/test/X86/Inputs/avx512.c

8

I have the same error in golang review, maybe it warnings about this new line, although I'm not sure what is going on with it on my review too :(

[Amir]

clang-format

[Amir]

bolt/test/X86/Inputs/avx512.c

8

Apparently clang-format was complaining about the space in second asm() line.

[Amir]

This change breaks testing with an upstream clang:

/home/worker/bolt-worker2/bolt-x86_64-ubuntu-bolttests/llvm-project/bolt/test/Inputs/icf-jump-tables.c:3:13: error: call to undeclared function 'puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Reverted the change for now, will figure out the proper fix and re-land.

[Amir]

Fix build with upstream clang

[yota9]

@Amir Consider to add puts to stub.h and include the header

[Amir]

Move puts to stub.h

[Amir]

In D124863#3489705, @yota9 wrote:

@Amir Consider to add puts to stub.h and include the header

Thanks for a suggestion!

bolt/test/Inputs/icf-jump-tables.c

-#include <stdio.h>
-
 int inc(int x) {
   switch (x) {
     case 0: puts("0"); return 1;
     case 1: puts("1"); return 2;
     case 2: puts("2"); return 3;
     case 3: puts("3"); return 4;
     case 4: puts("4"); return 5;
     case 5: puts("5"); return 6;

bolt/test/X86/Inputs/avx512.c

-#include <stdio.h>
-
 void use_avx512() {
-  printf("after first entry\n");
   asm (".byte 0x62, 0xe2, 0xf5, 0x70, 0x2c, 0xda");
-  asm ("secondary_entry:");
-  printf("after secondary entry\n");
+  asm("secondary_entry:");
 }
 
 int main() {
-  printf("about to use avx-512 instruction...\n");
   use_avx512();
 
   return 0;
 }

bolt/test/X86/Inputs/inline-foo.c

-#include <stdio.h>
+// don't include stdio as the test is linked with -nostdlib
 
 void foo() {
   puts("Hello world!\n");
 }