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| author | Maciej W. Rozycki <macro@codesourcery.com> | 2014-12-01 12:56:08 +0000 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@gcc.gnu.org> | 2014-12-01 12:56:08 +0000 |
| commit | 9df0192130fd054a9edf84884ca7bbccf8f7679a (patch) | |
| tree | d4b75e1a2a77fc2a2dc6d8c329b70a72f0679a3b | |
| parent | 152ceb59c5cbf96a033816d38248273c3b5ceb2a (diff) | |
| download | gcc-9df0192130fd054a9edf84884ca7bbccf8f7679a.zip gcc-9df0192130fd054a9edf84884ca7bbccf8f7679a.tar.gz gcc-9df0192130fd054a9edf84884ca7bbccf8f7679a.tar.bz2 | |
mips.c (mips16_build_call_stub): Move the save of the return address in $18 ahead of passing arguments to FPRs.
* config/mips/mips.c (mips16_build_call_stub): Move the save of
the return address in $18 ahead of passing arguments to FPRs.
From-SVN: r218209
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/mips/mips.c | 17 |
2 files changed, 17 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7aeb9bf..c31d8bc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-12-01 Maciej W. Rozycki <macro@codesourcery.com> + + * config/mips/mips.c (mips16_build_call_stub): Move the save of + the return address in $18 ahead of passing arguments to FPRs. + 2014-12-01 Ilya Enkovich <ilya.enkovich@intel.com> PR target/64055 diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c index 5a53d5f..8599285 100644 --- a/gcc/config/mips/mips.c +++ b/gcc/config/mips/mips.c @@ -6942,6 +6942,17 @@ mips16_build_call_stub (rtx retval, rtx *fn_ptr, rtx args_size, int fp_code) /* "Save" $sp in itself so we don't use the fake CFA. This is: DW_CFA_val_expression r29, { DW_OP_reg29 }. */ fprintf (asm_out_file, "\t.cfi_escape 0x16,29,1,0x6d\n"); + + /* Save the return address in $18. The stub's caller knows + that $18 might be clobbered, even though $18 is usually + a call-saved register. + + Do it early on in case the last move to a floating-point + register can be scheduled into the delay slot of the + call we are about to make. */ + fprintf (asm_out_file, "\tmove\t%s,%s\n", + reg_names[GP_REG_FIRST + 18], + reg_names[RETURN_ADDR_REGNUM]); } else { @@ -6963,11 +6974,7 @@ mips16_build_call_stub (rtx retval, rtx *fn_ptr, rtx args_size, int fp_code) if (fp_ret_p) { - /* Save the return address in $18 and call the non-MIPS16 function. - The stub's caller knows that $18 might be clobbered, even though - $18 is usually a call-saved register. */ - fprintf (asm_out_file, "\tmove\t%s,%s\n", - reg_names[GP_REG_FIRST + 18], reg_names[RETURN_ADDR_REGNUM]); + /* Now call the non-MIPS16 function. */ output_asm_insn (MIPS_CALL ("jal", &fn, 0, -1), &fn); fprintf (asm_out_file, "\t.cfi_register 31,18\n"); |