Subzero. ARM32. Combine allocas.

tests_lit/assembler/arm32/bic.ll

 ; Show that we know how to translate bic.
 
 ; NOTE: We use -O2 to get rid of memory stores.
 
 ; REQUIRES: allow_dump
 
 ; Compile using standalone assembler.
 ; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -O2 \
 ; RUN:   | FileCheck %s --check-prefix=ASM
 
@@ skipping 10 matching lines @@
 ; RUN:   --args -O2 | FileCheck %s --check-prefix=DIS
 
 define internal i32 @AllocBigAlign() {
   %addr = alloca i8, align 32
   %v = ptrtoint i8* %addr to i32
   ret i32 %v
 }
 
 ; ASM-LABEL:AllocBigAlign:
 ; ASM-NEXT:.LAllocBigAlign$__0:
-; ASM-NEXT:  push    {fp}
-; ASM-NEXT:  mov     fp, sp
-; ASM-NEXT:  sub     sp, sp, #12
-; ASM-NEXT:  bic     sp, sp, #31
-; ASM-NEXT:  sub     sp, sp, #32
-; ASM-NEXT:  mov     r0, sp
-; ASM-NEXT:  mov     sp, fp
-; ASM-NEXT:  pop     {fp}
-; ASM-NEXT:  # fp = def.pseudo 
-; ASM-NEXT:  bx      lr
-
 ; DIS-LABEL:00000000 <AllocBigAlign>:
-; DIS-NEXT:   0:        e52db004
-; DIS-NEXT:   4:        e1a0b00d
-; DIS-NEXT:   8:        e24dd00c
-; DIS-NEXT:   c:        e3cdd01f
-; DIS-NEXT:  10:        e24dd020
-; DIS-NEXT:  14:        e1a0000d
-; DIS-NEXT:  18:        e1a0d00b
-; DIS-NEXT:  1c:        e49db004
-; DIS-NEXT:  20:        e12fff1e
-
 ; IASM-LABEL:AllocBigAlign:
 ; IASM-NEXT:.LAllocBigAlign$__0:
+
+; ASM-NEXT:  push    {fp}
+; DIS-NEXT:   0:        e52db004
 ; IASM-NEXT:    .byte 0x4
 ; IASM-NEXT:    .byte 0xb0
 ; IASM-NEXT:    .byte 0x2d
 ; IASM-NEXT:    .byte 0xe5
 
+; ASM-NEXT:  mov     fp, sp
+; DIS-NEXT:   4:        e1a0b00d
 ; IASM:         .byte 0xd
 ; IASM-NEXT:    .byte 0xb0
 ; IASM-NEXT:    .byte 0xa0
 ; IASM-NEXT:    .byte 0xe1
 
-; IASM:         .byte 0xc
+; ASM-NEXT:  sub     sp, sp, #32
+; DIS-NEXT:   8:        e24dd020
+; IASM:         .byte 0x20
 ; IASM-NEXT:    .byte 0xd0
 ; IASM-NEXT:    .byte 0x4d
 ; IASM-NEXT:    .byte 0xe2
 
+; ASM-NEXT:  bic     sp, sp, #31
+; DIS-NEXT:   c:        e3cdd01f
 ; IASM:         .byte 0x1f
 ; IASM-NEXT:    .byte 0xd0
 ; IASM-NEXT:    .byte 0xcd
 ; IASM-NEXT:    .byte 0xe3
 
-; IASM:         .byte 0x20
-; IASM-NEXT:    .byte 0xd0
-; IASM-NEXT:    .byte 0x4d
+; ASM-NEXT:  # sp = def.pseudo 
+
+; ASM-NEXT:  add     r0, sp, #0
+; DIS-NEXT:  10:        e28d0000
+; IASM:         .byte 0x0
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x8d
 ; IASM-NEXT:    .byte 0xe2
 
-; IASM:         .byte 0xd
-; IASM-NEXT:    .byte 0x0
-; IASM-NEXT:    .byte 0xa0
-; IASM-NEXT:    .byte 0xe1
-
+; ASM-NEXT:  mov     sp, fp
+; DIS-NEXT:  14:        e1a0d00b
 ; IASM:         .byte 0xb
 ; IASM-NEXT:    .byte 0xd0
 ; IASM-NEXT:    .byte 0xa0
 ; IASM-NEXT:    .byte 0xe1
 
+; ASM-NEXT:  pop     {fp}
+; DIS-NEXT:  18:        e49db004
 ; IASM-NEXT:    .byte 0x4
 ; IASM-NEXT:    .byte 0xb0
 ; IASM-NEXT:    .byte 0x9d
 ; IASM-NEXT:    .byte 0xe4
 
+; ASM-NEXT:  # fp = def.pseudo 
+
+; ASM-NEXT:  bx      lr
+; DIS-NEXT:  1c:        e12fff1e
 ; IASM:         .byte 0x1e
 ; IASM-NEXT:    .byte 0xff
 ; IASM-NEXT:    .byte 0x2f
 ; IASM-NEXT:    .byte 0xe1