mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-02 01:48:05 +00:00
68 lines
1.3 KiB
Plaintext
68 lines
1.3 KiB
Plaintext
dnl Check if the compiler is gcc and has PR49911. If so
|
|
dnl disable vrp.
|
|
|
|
AC_DEFUN([MOZ_GCC_PR49911],
|
|
[
|
|
if test "$GNU_CC"; then
|
|
|
|
AC_MSG_CHECKING(for gcc PR49911)
|
|
ac_have_gcc_pr49911="no"
|
|
AC_LANG_SAVE
|
|
AC_LANG_CPLUSPLUS
|
|
|
|
_SAVE_CXXFLAGS=$CXXFLAGS
|
|
CXXFLAGS="-O2"
|
|
AC_TRY_RUN([
|
|
extern "C" void abort(void);
|
|
typedef enum {
|
|
eax, ecx, edx, ebx, esp, ebp,
|
|
esi, edi }
|
|
RegisterID;
|
|
union StateRemat {
|
|
RegisterID reg_;
|
|
int offset_;
|
|
};
|
|
static StateRemat FromRegister(RegisterID reg) {
|
|
StateRemat sr;
|
|
sr.reg_ = reg;
|
|
return sr;
|
|
}
|
|
static StateRemat FromAddress3(int address) {
|
|
StateRemat sr;
|
|
sr.offset_ = address;
|
|
if (address < 46 && address >= 0) {
|
|
abort();
|
|
}
|
|
return sr;
|
|
}
|
|
struct FrameState {
|
|
StateRemat dataRematInfo2(bool y, int z) {
|
|
if (y) return FromRegister(RegisterID(1));
|
|
return FromAddress3(z);
|
|
}
|
|
};
|
|
FrameState frame;
|
|
StateRemat x;
|
|
__attribute__((noinline)) void jsop_setelem(bool y, int z) {
|
|
x = frame.dataRematInfo2(y, z);
|
|
}
|
|
int main(void) {
|
|
jsop_setelem(0, 47);
|
|
}
|
|
], true,
|
|
ac_have_gcc_pr49911="yes",
|
|
true)
|
|
CXXFLAGS="$_SAVE_CXXFLAGS"
|
|
|
|
AC_LANG_RESTORE
|
|
|
|
if test "$ac_have_gcc_pr49911" = "yes"; then
|
|
AC_MSG_RESULT(yes)
|
|
CFLAGS="$CFLAGS -fno-tree-vrp"
|
|
CXXFLAGS="$CXXFLAGS -fno-tree-vrp"
|
|
else
|
|
AC_MSG_RESULT(no)
|
|
fi
|
|
fi
|
|
])
|