Commit 48e4f473 by Oleg Endo

re PR target/49263 (SH Target: underutilized "TST #imm, R0" instruction)

gcc/
	PR target/49263
	* config/sh/sh.c (sh_split_treg_set_expr): Invoke emit_insn before
	remove_insn.
	* config/sh/sh.md (tstsi_t): Don't try to optimize constant with right
	shifts if it already fits into K08.

gcc/testsuite/
	PR target/49263
	* gcc.target/sh/pr49263-4.c: New.

From-SVN: r220144
parent 831a3a9e
2015-01-26 Oleg Endo <olegendo@gcc.gnu.org>
PR target/49263
* config/sh/sh.c (sh_split_treg_set_expr): Invoke emit_insn before
remove_insn.
* config/sh/sh.md (tstsi_t): Don't try to optimize constant with right
shifts if it already fits into K08.
2015-01-26 Jakub Jelinek <jakub@redhat.com> 2015-01-26 Jakub Jelinek <jakub@redhat.com>
PR ipa/64730 PR ipa/64730
......
...@@ -14466,6 +14466,8 @@ sh_split_treg_set_expr (rtx x, rtx_insn* curr_insn) ...@@ -14466,6 +14466,8 @@ sh_split_treg_set_expr (rtx x, rtx_insn* curr_insn)
fprintf (dump_file, "trailing nott insn %d\n", INSN_UID (nott_insn)); fprintf (dump_file, "trailing nott insn %d\n", INSN_UID (nott_insn));
} }
emit_insn (insnlist.first);
if (nott_insn != NULL && append_nott) if (nott_insn != NULL && append_nott)
{ {
if (dump_file) if (dump_file)
...@@ -14475,8 +14477,6 @@ sh_split_treg_set_expr (rtx x, rtx_insn* curr_insn) ...@@ -14475,8 +14477,6 @@ sh_split_treg_set_expr (rtx x, rtx_insn* curr_insn)
append_nott = false; append_nott = false;
} }
emit_insn (insnlist.first);
if (append_nott) if (append_nott)
nott_insn = emit_insn (gen_nott (get_t_reg_rtx ())); nott_insn = emit_insn (gen_nott (get_t_reg_rtx ()));
......
...@@ -742,8 +742,12 @@ ...@@ -742,8 +742,12 @@
variant instead and load the constant into a reg. For that we'd need variant instead and load the constant into a reg. For that we'd need
to do some analysis. */ to do some analysis. */
if ((op1val & 0xFFFF) == 0 if (CONST_OK_FOR_K08 (op1val))
&& CONST_OK_FOR_K08 (op1val >> 16) && optimize_size) {
/* Do nothing. */
}
else if ((op1val & 0xFFFF) == 0
&& CONST_OK_FOR_K08 (op1val >> 16) && optimize_size)
{ {
/* Use a swap.w insn to do a shift + reg copy (to R0) in one insn. */ /* Use a swap.w insn to do a shift + reg copy (to R0) in one insn. */
op1val = op1val >> 16; op1val = op1val >> 16;
......
2015-01-26 Oleg Endo <olegendo@gcc.gnu.org>
PR target/49263
* gcc.target/sh/pr49263-4.c: New.
2015-01-26 Paul Thomas <pault@gcc.gnu.org> 2015-01-26 Paul Thomas <pault@gcc.gnu.org>
PR fortran/62044 PR fortran/62044
......
/* Verify that TST #imm, R0 instruction is generated if the constant
allows it when compiling for -Os. */
/* { dg-do compile } */
/* { dg-options "-Os" } */
/* { dg-final { scan-assembler-not "and" } } */
/* { dg-final { scan-assembler-not "extu" } } */
/* { dg-final { scan-assembler-not "exts" } } */
/* { dg-final { scan-assembler-not "shlr" } } */
#include "pr49263.c"
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