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S/390: Fix cfi for GPR 2 FPR saves

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gcc/ChangeLog:

2015-07-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	    * config/s390/s390.c (s390_save_gprs_to_fprs): Add CFA_REGISTER
	    reg note to the GPR -> FPR save instructions.

gcc/testsuite/ChangeLog:

2015-07-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	    * gcc.target/s390/gpr2fprsavecfi.c: New test.

From-SVN: r226149
This commit is contained in:
Andreas Krebbel 2015-07-24 11:29:50 +00:00 • committed by Andreas Krebbel
parent 3d44ff9919
commit b8fedf996b
4 changed files with 36 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-07-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/s390.c (s390_save_gprs_to_fprs): Add CFA_REGISTER
reg note to the GPR -> FPR save instructions.
2015-07-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/s390.c (s390_rtx_costs): Make risbg patterns

4
gcc/config/s390/s390.c
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@ -10132,6 +10132,10 @@ s390_save_gprs_to_fprs (void)
emit_move_insn (gen_rtx_REG (DImode, cfun_gpr_save_slot (i)),
gen_rtx_REG (DImode, i));
RTX_FRAME_RELATED_P (insn) = 1;
/* This prevents dwarf2cfi from interpreting the set. Doing
so it might emit def_cfa_register infos setting an FPR as
new CFA. */
add_reg_note (insn, REG_CFA_REGISTER, PATTERN (insn));
}
}
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2015-07-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* gcc.target/s390/gpr2fprsavecfi.c: New test.
2015-07-24 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* gcc.target/s390/insv-1.c: New test.

23
gcc/testsuite/gcc.target/s390/gpr2fprsavecfi.c Normal file
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@ -0,0 +1,23 @@
/* { dg-do compile } */
/* { dg-options "-O3 -march=z10 -mzarch -fdwarf2-cfi-asm" } */
char *gl[100];
long
foo ()
{
long r = 0;
char bla[100];
int i;
__builtin_memcpy (bla, gl, 100);
for (i = 0; i < 100; i++)
r += bla[i];
return r;
}
/* { dg-final { scan-assembler-not "cfi_def_cfa_register" } } */
/* { dg-final { scan-assembler "cfi_register" } } */
/* { dg-final { scan-assembler "cfi_def_cfa_offset" } } */