[Bug target/70359] [6 Regression] Code size increase for ARM compared to gcc-5.3.0

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70359

--- Comment #12 from kugan at gcc dot gnu.org ---
However, diff of cfgexand is significantly different:
 ;; Full RTL generated for this function:
 ;;
    32: NOTE_INSN_DELETED
-   38: NOTE_INSN_BASIC_BLOCK 2
+   39: NOTE_INSN_BASIC_BLOCK 2
    33: r151:SI=r0:SI
    34: r152:SI=r1:SI
    35: r153:SI=r2:SI
    36: NOTE_INSN_FUNCTION_BEG
-   40: {r141:SI=abs(r151:SI);clobber cc:CC;}
-   41: r154:SI=r153:SI-0x1
-   42: r142:SI=r152:SI+r154:SI
-   43: r155:SI=0
-   44: r156:QI=r155:SI#0
-   45: [r142:SI]=r156:QI
-   61: L61:
-   46: NOTE_INSN_BASIC_BLOCK 4
-   47: r142:SI=r142:SI-0x1
-   48: r1:SI=0xa
-   49: r0:SI=r141:SI
-   50: r0:DI=call [`__aeabi_uidivmod'] argc:0
+   41: {r141:SI=abs(r151:SI);clobber cc:CC;}
+   42: r154:SI=r153:SI-0x1
+   43: r142:SI=r152:SI+r154:SI
+   44: r155:SI=0
+   45: r156:QI=r155:SI#0
+   46: [r142:SI]=r156:QI
+   81: pc=L62
+   82: barrier
+   84: L84:
+   83: NOTE_INSN_BASIC_BLOCK 4
+   37: r142:SI=r150:SI
+   62: L62:
+   47: NOTE_INSN_BASIC_BLOCK 5
+   48: r150:SI=r142:SI-0x1
+   49: r1:SI=0xa
+   50: r0:SI=r141:SI
+   51: r0:DI=call [`__aeabi_uidivmod'] argc:0
       REG_CALL_DECL `__aeabi_uidivmod'
       REG_EH_REGION 0xffffffff80000000
-   51: r162:SI=r1:SI
+   52: r162:SI=r1:SI
       REG_EQUAL umod(r141:SI,0xa)
-   52: r163:QI=r162:SI#0
-   53: r164:SI=r163:QI#0+0x30
-   54: r165:QI=r164:SI#0
-   55: [r142:SI]=r165:QI
-   56: r1:SI=0xa
-   57: r0:SI=r141:SI
-   58: r0:SI=call [`__aeabi_uidiv'] argc:0
+   53: r163:QI=r162:SI#0
+   54: r164:SI=r163:QI#0+0x30
+   55: r165:QI=r164:SI#0
+   56: [r150:SI]=r165:QI
+   57: r1:SI=0xa
+   58: r0:SI=r141:SI
+   59: r0:SI=call [`__aeabi_uidiv'] argc:0
       REG_CALL_DECL `__aeabi_uidiv'
       REG_EH_REGION 0xffffffff80000000
-   59: r169:SI=r0:SI
+   60: r169:SI=r0:SI
       REG_EQUAL udiv(r141:SI,0xa)
-   60: r141:SI=r169:SI
-   62: cc:CC=cmp(r141:SI,0)
-   63: pc={(cc:CC!=0)?L61:pc}
+   61: r141:SI=r169:SI
+   63: cc:CC=cmp(r141:SI,0)
+   64: pc={(cc:CC!=0)?L84:pc}
       REG_BR_PROB 9100
-   64: NOTE_INSN_BASIC_BLOCK 5
-   65: cc:CC=cmp(r151:SI,0)
-   66: pc={(cc:CC>=0)?L72:pc}
+   65: NOTE_INSN_BASIC_BLOCK 6
+   66: cc:CC=cmp(r151:SI,0)
+   67: pc={(cc:CC>=0)?L77:pc}
       REG_BR_PROB 6335
-   67: NOTE_INSN_BASIC_BLOCK 6
-   68: r149:SI=r142:SI-0x1
-   69: r170:SI=0x2d
-   70: r171:QI=r170:SI#0
-   71: [r142:SI-0x1]=r171:QI
-   37: r142:SI=r149:SI
-   72: L72:
-   73: NOTE_INSN_BASIC_BLOCK 7
-   74: r150:SI=r142:SI
+   68: NOTE_INSN_BASIC_BLOCK 7
+   69: r149:SI=r142:SI-0x2
+   70: r170:SI=0x2d
+   71: r171:QI=r170:SI#0
+   72: [r150:SI-0x1]=r171:QI
+   38: r150:SI=r149:SI
+   77: L77:
+   80: NOTE_INSN_BASIC_BLOCK 9
    78: r0:SI=r150:SI
    79: use r0:SI