[gcc(refs/users/marxin/heads/marxin-gcc-benchmark-branch)] IBM Z: zTPF: Prevent FPR usage

[Martin Liska]

https://gcc.gnu.org/g:14cb388b743ba1222da261926d3b0934d695deb2

commit 14cb388b743ba1222da261926d3b0934d695deb2
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date:   Wed Mar 4 13:29:39 2020 +0100

    IBM Z: zTPF: Prevent FPR usage
    
    For the zTPF we must not use floating point registers.
    
    gcc/ChangeLog:
    
    2020-03-04  Andreas Krebbel  <krebbel@linux.ibm.com>
    
            * config/s390/s390.c (s390_secondary_memory_needed): Disallow
            direct FPR-GPR copies.
            (s390_register_info_gprtofpr): Disallow GPR content to be saved in
            FPRs.

Diff:
---
 gcc/config/s390/s390.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 31af842eb35..ae2be36e65d 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -4647,7 +4647,8 @@ s390_secondary_memory_needed (machine_mode mode,
 	    && reg_classes_intersect_p (class2, GENERAL_REGS))
 	   || (reg_classes_intersect_p (class1, GENERAL_REGS)
 	       && reg_classes_intersect_p (class2, VEC_REGS)))
-	  && (!TARGET_DFP || !TARGET_64BIT || GET_MODE_SIZE (mode) != 8)
+	  && (TARGET_TPF || !TARGET_DFP || !TARGET_64BIT
+	      || GET_MODE_SIZE (mode) != 8)
 	  && (!TARGET_VX || (SCALAR_FLOAT_MODE_P (mode)
 			     && GET_MODE_SIZE (mode) > 8)));
 }
@@ -9554,7 +9555,7 @@ s390_register_info_gprtofpr ()
   int save_reg_slot = FPR0_REGNUM;
   int i, j;
 
-  if (!TARGET_Z10 || !TARGET_HARD_FLOAT || !crtl->is_leaf)
+  if (TARGET_TPF || !TARGET_Z10 || !TARGET_HARD_FLOAT || !crtl->is_leaf)
     return;
 
   /* builtin_eh_return needs to be able to modify the return address