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From a950e2d4fb15e9ebabe11a5606f24a510f297d6d Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Thu, 12 Jan 2017 16:50:17 +0530
Subject: [PATCH 10/53] [Patch, microblaze]: Fix the Microblaze crash with
msmall-divides flag Compiler is crashing when we use msmall-divides and
mxl-barrel-shift flag. This is because when use above flags
microblaze_expand_divide function will be called for division operation. In
microblaze_expand_divide function we are using sub_reg but MicroBlaze doesn't
have subreg register due to this compiler was crashing. Changed the logic to
avoid sub_reg call
Signed-off-by:Nagaraju Mekala <nmekala@xilix.com>
---
gcc/config/microblaze/microblaze.cc | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Index: gcc-12.1.0/gcc/config/microblaze/microblaze.cc
===================================================================
--- gcc-12.1.0.orig/gcc/config/microblaze/microblaze.cc
+++ gcc-12.1.0/gcc/config/microblaze/microblaze.cc
@@ -3710,8 +3710,7 @@ microblaze_expand_divide (rtx operands[]
mem_rtx = gen_rtx_MEM (QImode,
gen_rtx_PLUS (Pmode, regt1, div_table_rtx));
- insn = emit_insn (gen_movqi (regqi, mem_rtx));
- insn = emit_insn (gen_movsi (operands[0], gen_rtx_SUBREG (SImode, regqi, 0)));
+ insn = emit_insn (gen_zero_extendqisi2(operands[0],mem_rtx));
jump = emit_jump_insn_after (gen_jump (div_end_label), insn);
JUMP_LABEL (jump) = div_end_label;
LABEL_NUSES (div_end_label) = 1;
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