From 559c1ae100489da76a0283750361ace146fdeb77 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Mon, 30 Sep 2019 16:20:34 +0000 Subject: [PATCH] Remove global call sets: DF (entry/exit defs) The code patched here is seeing whether the current function needs to save at least part of a register before using it. 2019-09-30 Richard Sandiford gcc/ * df-scan.c (df_get_entry_block_def_set): Use crtl->abi to test whether the current function needs to save at least part of a register before using it. (df_get_exit_block_use_set): Likewise for epilogue restores. From-SVN: r276320 --- gcc/ChangeLog | 7 +++++++ gcc/df-scan.c | 9 ++++++--- 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 13caa919728..3617216e582 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2019-09-30 Richard Sandiford + + * df-scan.c (df_get_entry_block_def_set): Use crtl->abi to test + whether the current function needs to save at least part of a + register before using it. + (df_get_exit_block_use_set): Likewise for epilogue restores. + 2019-09-30 Richard Sandiford * df-problems.c: Include regs.h and function-abi.h. diff --git a/gcc/df-scan.c b/gcc/df-scan.c index 7dda4cacf7a..36012b7b821 100644 --- a/gcc/df-scan.c +++ b/gcc/df-scan.c @@ -3499,7 +3499,9 @@ df_get_entry_block_def_set (bitmap entry_block_defs) /* Defs for the callee saved registers are inserted so that the pushes have some defining location. */ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) - if ((call_used_or_fixed_reg_p (i) == 0) && (df_regs_ever_live_p (i))) + if (!crtl->abi->clobbers_full_reg_p (i) + && !fixed_regs[i] + && df_regs_ever_live_p (i)) bitmap_set_bit (entry_block_defs, i); } @@ -3672,8 +3674,9 @@ df_get_exit_block_use_set (bitmap exit_block_uses) { /* Mark all call-saved registers that we actually used. */ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) - if (df_regs_ever_live_p (i) && !LOCAL_REGNO (i) - && !TEST_HARD_REG_BIT (regs_invalidated_by_call, i)) + if (df_regs_ever_live_p (i) + && !LOCAL_REGNO (i) + && !crtl->abi->clobbers_full_reg_p (i)) bitmap_set_bit (exit_block_uses, i); } -- 2.30.2