In addition to the previous patch to aid in transitioning the PowerPC long
double format to IEEE 128-bit, I have some additional patches that are needed.
The previous patch is:
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00634.html
This patch prevents re-running the ibm128 and ieee128 initialization functions
when the compiler was handling the clone and target attributes/pragmas. In
particular, the compiler would issue an internal compiler error or segfault
when the complex multiply/divide built-in functions were re-defined.
Note, the GLIBC library that I used is not fully converted. I'm ignoring the
issues that are due to the library, and just focusing on the compiler support.
I have done separate bootstraps on a little endian power8 system with the long
double type set to IBM extended and IEEE 128-bit extended. There were no
regressions in using this patch. Can I check it in, and eventually back port
it to GCC 8.2 with the other long double transition patches.
2018-06-13 Michael Meissner <meiss...@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_init_libfuncs): Do not re-run the
initialization during clone or target pragma/attribute
processing.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 261512)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -18000,6 +18000,13 @@ init_float128_ieee (machine_mode mode)
static void
rs6000_init_libfuncs (void)
{
+ static bool done_init = false;
+
+ if (done_init)
+ return;
+
+ done_init = true;
+
/* __float128 support. */
if (TARGET_FLOAT128_TYPE)
{
