diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/configure b/configure index 74627a7eed6..02a905bfb55 100755 --- a/configure +++ b/configure @@ -14518,6 +14518,46 @@ $as_echo "$pgac_cv_have_ppc_mutex_hint" >&6; } $as_echo "#define HAVE_PPC_LWARX_MUTEX_HINT 1" >>confdefs.h fi + # Check if compiler accepts "i"(x) when __builtin_constant_p(x). + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __builtin_constant_p(x) implies \"i\"(x) acceptance" >&5 +$as_echo_n "checking whether __builtin_constant_p(x) implies \"i\"(x) acceptance... " >&6; } +if ${pgac_cv_have_i_constraint__builtin_constant_p+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +static inline int + addi(int ra, int si) + { + int res = 0; + if (__builtin_constant_p(si)) + __asm__ __volatile__( + " addi %0,%1,%2\n" : "=r"(res) : "b"(ra), "i"(si)); + return res; + } + int test_adds(int x) { return addi(3, x) + addi(x, 5); } +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + pgac_cv_have_i_constraint__builtin_constant_p=yes +else + pgac_cv_have_i_constraint__builtin_constant_p=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_have_i_constraint__builtin_constant_p" >&5 +$as_echo "$pgac_cv_have_i_constraint__builtin_constant_p" >&6; } + if test x"$pgac_cv_have_i_constraint__builtin_constant_p" = xyes ; then + +$as_echo "#define HAVE_I_CONSTRAINT__BUILTIN_CONSTANT_P 1" >>confdefs.h + + fi ;; esac |