diff options
Diffstat (limited to 'bsp/meta-synopsys/recipes-devtools/gcc/gcc-arc/0041-ARC-Emit-blockage-regardless-to-avoid-delay-slot-sch.patch')
| -rw-r--r-- | bsp/meta-synopsys/recipes-devtools/gcc/gcc-arc/0041-ARC-Emit-blockage-regardless-to-avoid-delay-slot-sch.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/bsp/meta-synopsys/recipes-devtools/gcc/gcc-arc/0041-ARC-Emit-blockage-regardless-to-avoid-delay-slot-sch.patch b/bsp/meta-synopsys/recipes-devtools/gcc/gcc-arc/0041-ARC-Emit-blockage-regardless-to-avoid-delay-slot-sch.patch new file mode 100644 index 00000000..dfdc4f16 --- /dev/null +++ b/bsp/meta-synopsys/recipes-devtools/gcc/gcc-arc/0041-ARC-Emit-blockage-regardless-to-avoid-delay-slot-sch.patch @@ -0,0 +1,83 @@ +From bda19efc40252dff9bf25ec3ca63bb968fb7fa4a Mon Sep 17 00:00:00 2001 +From: Claudiu Zissulescu <claziss@gmail.com> +Date: Wed, 16 Jan 2019 13:16:09 +0200 +Subject: [PATCH] [ARC] Emit blockage regardless to avoid delay slot + scheduling. + +The delay slot scheduler can reschedule some of the frame related +instructions resulting in having incorect CFI information. This patch +introduces a schedule blockage to avoid this problem. + +gcc/ +xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com> + + * config/arc/arc.c (arc_expand_prologue): Emit blockage regardless + to avoid delay slot scheduling. + * config/arc/arc.md (stack_tie): Remove. + (UNSPEC_ARC_STKTIE): Likewise. + +Upstream status: Pending + +Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> +--- + gcc/config/arc/arc.c | 12 ++++-------- + gcc/config/arc/arc.md | 13 ------------- + 2 files changed, 4 insertions(+), 21 deletions(-) + +diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c +index 88b76a2e94b..7b201d3f64c 100644 +--- a/gcc/config/arc/arc.c ++++ b/gcc/config/arc/arc.c +@@ -3716,14 +3716,10 @@ arc_expand_prologue (void) + + /* Allocate the stack frame. */ + if (frame_size_to_allocate > 0) +- { +- frame_stack_add ((HOST_WIDE_INT) 0 - frame_size_to_allocate); +- /* If the frame pointer is needed, emit a special barrier that +- will prevent the scheduler from moving stores to the frame +- before the stack adjustment. */ +- if (arc_frame_pointer_needed ()) +- emit_insn (gen_stack_tie (stack_pointer_rtx, hard_frame_pointer_rtx)); +- } ++ frame_stack_add ((HOST_WIDE_INT) 0 - frame_size_to_allocate); ++ ++ /* Emit a blockage to avoid delay slot scheduling. */ ++ emit_insn (gen_blockage ()); + } + + /* Do any necessary cleanup after a function to restore stack, frame, +diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md +index f2313fc49f2..a3ec6a41ac2 100644 +--- a/gcc/config/arc/arc.md ++++ b/gcc/config/arc/arc.md +@@ -136,7 +136,6 @@ + UNSPEC_ARC_VMAC2HU + UNSPEC_ARC_VMPY2H + UNSPEC_ARC_VMPY2HU +- UNSPEC_ARC_STKTIE + + VUNSPEC_ARC_RTIE + VUNSPEC_ARC_SYNC +@@ -6283,18 +6282,6 @@ core_3, archs4x, archs4xd, archs4xd_slow" + (set_attr "predicable" "yes,no,no,yes,no") + (set_attr "cond" "canuse,nocond,nocond,canuse_limm,nocond")]) + +-(define_insn "stack_tie" +- [(set (mem:BLK (scratch)) +- (unspec:BLK [(match_operand:SI 0 "register_operand" "r") +- (match_operand:SI 1 "register_operand" "r")] +- UNSPEC_ARC_STKTIE))] +- "" +- "" +- [(set_attr "length" "0") +- (set_attr "iscompact" "false") +- (set_attr "type" "block")] +- ) +- + (define_insn "*add_shift" + [(set (match_operand:SI 0 "register_operand" "=q,r,r") + (plus:SI (ashift:SI (match_operand:SI 1 "register_operand" "q,r,r") +-- +2.16.2 + |