From 23e0f4c3394c87e9bcb1dbf8a2866a1d43b1cd70 Mon Sep 17 00:00:00 2001 From: Bernd Edlinger Date: Fri, 16 Aug 2019 15:34:47 +0000 Subject: [PATCH] re PR tree-optimization/91109 ([arm] gcc.c-torture/execute/20040709-1.c fails since r273135) 2019-08-16 Bernd Edlinger PR tree-optimization/91109 * lra-int.h (lra_need_for_scratch_reg_p): Declare. * lra.c (lra): Use lra_need_for_scratch_reg_p. * lra-spills.c (lra_need_for_scratch_reg_p): New function. From-SVN: r274573 --- gcc/ChangeLog | 7 +++++++ gcc/lra-int.h | 1 + gcc/lra-spills.c | 13 +++++++++++++ gcc/lra.c | 6 +++++- 4 files changed, 26 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 36e62908096..772c4e92816 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2019-08-16 Bernd Edlinger + + PR tree-optimization/91109 + * lra-int.h (lra_need_for_scratch_reg_p): Declare. + * lra.c (lra): Use lra_need_for_scratch_reg_p. + * lra-spills.c (lra_need_for_scratch_reg_p): New function. + 2019-08-16 Uroš Bizjak * config/i386/mmx.md (mmxdoublemode): New mode attribute. diff --git a/gcc/lra-int.h b/gcc/lra-int.h index a87a51e47a9..77abb7b903e 100644 --- a/gcc/lra-int.h +++ b/gcc/lra-int.h @@ -396,6 +396,7 @@ extern bool lra_coalesce (void); /* lra-spills.c: */ +extern bool lra_need_for_scratch_reg_p (void); extern bool lra_need_for_spills_p (void); extern void lra_spill (void); extern void lra_final_code_change (void); diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c index c73d5013167..a322da81544 100644 --- a/gcc/lra-spills.c +++ b/gcc/lra-spills.c @@ -549,6 +549,19 @@ spill_pseudos (void) } } +/* Return true if we need scratch reg assignments. */ +bool +lra_need_for_scratch_reg_p (void) +{ + int i; max_regno = max_reg_num (); + + for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++) + if (lra_reg_info[i].nrefs != 0 && lra_get_regno_hard_regno (i) < 0 + && lra_former_scratch_p (i)) + return true; + return false; +} + /* Return true if we need to change some pseudos into memory. */ bool lra_need_for_spills_p (void) diff --git a/gcc/lra.c b/gcc/lra.c index d7593998f97..1f977448136 100644 --- a/gcc/lra.c +++ b/gcc/lra.c @@ -2567,7 +2567,11 @@ lra (FILE *f) lra_create_live_ranges (lra_reg_spill_p, true); live_p = true; if (! lra_need_for_spills_p ()) - break; + { + if (lra_need_for_scratch_reg_p ()) + continue; + break; + } } lra_spill (); /* Assignment of stack slots changes elimination offsets for