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nvptx.md (nvptx_reorg_subreg): New fn, broken out of ...

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* config/nvptx/nvptx.md (nvptx_reorg_subreg): New fn, broken out of ...
	(nvptx_reorg): Here.  Keep the non-subreg pieces.

From-SVN: r225154
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Nathan Sidwell 2015-06-29 23:23:10 +00:00 committed by Nathan Sidwell
parent 71506d4107
commit 517665b38b
2 changed files with 39 additions and 12 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-06-29 Nathan Sidwell <nathan@codesourcery.com>
* config/nvptx/nvptx.md (nvptx_reorg_subreg): New fn, broken out of ...
(nvptx_reorg): Here. Keep the non-subreg pieces.
2015-06-29 H.J. Lu <hongjiu.lu@intel.com> 2015-06-29 H.J. Lu <hongjiu.lu@intel.com>
* config/gnu-user.h (GNU_USER_TARGET_ENDFILE_SPEC): Use * config/gnu-user.h (GNU_USER_TARGET_ENDFILE_SPEC): Use

46
gcc/config/nvptx/nvptx.c
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@ -1,3 +1,4 @@
/* Target code for NVPTX. /* Target code for NVPTX.
Copyright (C) 2014-2015 Free Software Foundation, Inc. Copyright (C) 2014-2015 Free Software Foundation, Inc.
Contributed by Bernd Schmidt <bernds@codesourcery.com> Contributed by Bernd Schmidt <bernds@codesourcery.com>
@ -1877,20 +1878,11 @@ get_replacement (struct reg_replace *r)
conversion copyin/copyout instructions. */ conversion copyin/copyout instructions. */
static void static void
nvptx_reorg (void) nvptx_reorg_subreg (void)
{ {
struct reg_replace qiregs, hiregs, siregs, diregs; struct reg_replace qiregs, hiregs, siregs, diregs;
rtx_insn *insn, *next; rtx_insn *insn, *next;
/* We are freeing block_for_insn in the toplev to keep compatibility
with old MDEP_REORGS that are not CFG based. Recompute it now. */
compute_bb_for_insn ();
df_clear_flags (DF_LR_RUN_DCE);
df_analyze ();
thread_prologue_and_epilogue_insns ();
qiregs.n_allocated = 0; qiregs.n_allocated = 0;
hiregs.n_allocated = 0; hiregs.n_allocated = 0;
siregs.n_allocated = 0; siregs.n_allocated = 0;
@ -1966,14 +1958,44 @@ nvptx_reorg (void)
validate_change (insn, recog_data.operand_loc[i], new_reg, false); validate_change (insn, recog_data.operand_loc[i], new_reg, false);
} }
} }
}
int maxregs = max_reg_num (); /* PTX-specific reorganization
1) mark now-unused registers, so function begin doesn't declare
unused registers.
2) replace subregs with suitable sequences.
*/
static void
nvptx_reorg (void)
{
struct reg_replace qiregs, hiregs, siregs, diregs;
rtx_insn *insn, *next;
/* We are freeing block_for_insn in the toplev to keep compatibility
with old MDEP_REORGS that are not CFG based. Recompute it now. */
compute_bb_for_insn ();
thread_prologue_and_epilogue_insns ();
df_clear_flags (DF_LR_RUN_DCE);
df_set_flags (DF_NO_INSN_RESCAN | DF_NO_HARD_REGS);
df_analyze ();
regstat_init_n_sets_and_refs (); regstat_init_n_sets_and_refs ();
for (int i = LAST_VIRTUAL_REGISTER + 1; i < maxregs; i++) int max_regs = max_reg_num ();
/* Mark unused regs as unused. */
for (int i = LAST_VIRTUAL_REGISTER + 1; i < max_regs; i++)
if (REG_N_SETS (i) == 0 && REG_N_REFS (i) == 0) if (REG_N_SETS (i) == 0 && REG_N_REFS (i) == 0)
regno_reg_rtx[i] = const0_rtx; regno_reg_rtx[i] = const0_rtx;
/* Replace subregs. */
nvptx_reorg_subreg (max_regs);
regstat_free_n_sets_and_refs (); regstat_free_n_sets_and_refs ();
df_finish_pass (true);
} }
/* Handle a "kernel" attribute; arguments as in /* Handle a "kernel" attribute; arguments as in