Add mls instruction to the ARM integrated assembler.

tests_lit/assembler/arm32/mls.ll

+; Show that we know how to translate mls.
+
+; REQUIRES: allow_dump
+
+; Compile using standalone assembler.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -Om1 --mattr=hwdiv-arm \
+; RUN:   | FileCheck %s --check-prefix=ASM
+
+; Show bytes in assembled standalone code.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --assemble --disassemble \
+; RUN:   --args -Om1 --mattr=hwdiv-arm | FileCheck %s --check-prefix=DIS
+
+; Compile using integrated assembler.
+; RUN: %p2i --filetype=iasm -i %s --target=arm32 --args -Om1 --mattr=hwdiv-arm \
+; RUN:   | FileCheck %s --check-prefix=IASM
+
+; Show bytes in assembled integrated code.
+; RUN: %p2i --filetype=iasm -i %s --target=arm32 --assemble --disassemble \
+; RUN:   --args -Om1 --mattr=hwdiv-arm | FileCheck %s --check-prefix=DIS
+
+define internal i32 @testMls(i32 %a, i32 %b) {
+; ASM-LABEL: testMls:
+; DIS-LABEL: 00000000 <testMls>:
+; IASM-LABEL: testMls:
+
+entry:
+; ASM-NEXT: .LtestMls$entry:
+; IASM-NEXT: .LtestMls$entry:
+
+; ASM-NEXT:     sub     sp, sp, #12
+; DIS-NEXT:    0:       e24dd00c
+; IASM-NEXT:    .byte 0xc
+; IASM-NEXT:    .byte 0xd0
+; IASM-NEXT:    .byte 0x4d
+; IASM-NEXT:    .byte 0xe2
+
+; ASM-NEXT:     str     r0, [sp, #8]
+; ASM-NEXT:     # [sp, #8] = def.pseudo 
+; DIS-NEXT:    4:       e58d0008
+; IASM-NEXT:    .byte 0x8
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x8d
+; IASM-NEXT:    .byte 0xe5
+
+; ASM-NEXT:     str     r1, [sp, #4]
+; ASM-NEXT:     # [sp, #4] = def.pseudo 
+; DIS-NEXT:    8:       e58d1004
+; IASM-NEXT:    .byte 0x4
+; IASM-NEXT:    .byte 0x10
+; IASM-NEXT:    .byte 0x8d
+; IASM-NEXT:    .byte 0xe5
+
+  %rem = srem i32 %a, %b
+
+; ASM-NEXT:     ldr     r0, [sp, #8]
+; DIS-NEXT:    c:       e59d0008
+; IASM-NEXT:    .byte 0x8
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x9d
+; IASM-NEXT:    .byte 0xe5
+
+; ASM-NEXT:     ldr     r1, [sp, #4]
+; DIS-NEXT:   10:       e59d1004
+; IASM-NEXT:    .byte 0x4
+; IASM-NEXT:    .byte 0x10
+; IASM-NEXT:    .byte 0x9d
+; IASM-NEXT:    .byte 0xe5
+
+; ASM-NEXT:    tst     r1, r1
+; DIS-NEXT:   14:       e1110001
+; IASM-NEXT:    .byte 0x1
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x11
+; IASM-NEXT:    .byte 0xe1
+
+; ASM-NEXT:     bne     .LtestMls$local$__0
+; DIS-NEXT:   18:       1a000000
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x1a
+
+; ASM-NEXT:     .long 0xe7fedef0
+; DIS-NEXT:   1c:       e7fedef0
+; IASM-NEXT:    .long 0xe7fedef0
+
+; ASM-NEXT: .LtestMls$local$__0:
+; IASM-NEXT: .LtestMls$local$__0:
+
+; ASM-NEXT:     ldr     r1, [sp, #4]
+; DIS-NEXT:   20:       e59d1004
+; IASM-NEXT:    .byte 0x4
+; IASM-NEXT:    .byte 0x10
+; IASM-NEXT:    .byte 0x9d
+; IASM-NEXT:    .byte 0xe5
+
+; ASM-NEXT:     sdiv    r2, r0, r1
+; DIS-NEXT:   24:       e712f110
+; IASM-NEXT:    .byte 0x10
+; IASM-NEXT:    .byte 0xf1
+; IASM-NEXT:    .byte 0x12
+; IASM-NEXT:    .byte 0xe7
+
+; ASM-NEXT:     mls     r0, r2, r1, r0
+; DIS-NEXT:   28:       e0600192
+; IASM-NEXT:    .byte 0x92
+; IASM-NEXT:    .byte 0x1
+; IASM-NEXT:    .byte 0x60
+; IASM-NEXT:    .byte 0xe0
+
+  ret i32 %rem
+}