Add hybrid assembler concept to ARM assembler.

tests_lit/assembler/arm32/ret.ll

Index: tests_lit/assembler/arm32/ret.ll
diff --git a/tests_lit/assembler/arm32/ret.ll b/tests_lit/assembler/arm32/ret.ll
index 95fce9771234b5e5b9b4bd2302cedc4031948139..5df61d4f3fa2fb3c86a877b0e678d95335c0e47c 100644
--- a/tests_lit/assembler/arm32/ret.ll
+++ b/tests_lit/assembler/arm32/ret.ll
@@ -3,36 +3,63 @@
 
 ; REQUIRES: allow_dump
 
-; RUN: %p2i --filetype=asm -i %s --target=arm32 \
+; Compile using standalone assembler.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -Om1 \
 ; RUN:   | FileCheck %s --check-prefix=ASM
-; RUN: %p2i --filetype=iasm -i %s --target=arm32 \
+
+; Show bytes in assembled standalone code.
+; RUN: %p2i --filetype=asm -i %s --target=arm32 --assemble --disassemble \
+; RUN:   --args -Om1 | FileCheck %s --check-prefix=DIS
+
+; Compile using integrated assembler.
+; RUN: %p2i --filetype=iasm -i %s --target=arm32 --args -Om1 \
 ; 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 | FileCheck %s --check-prefix=DIS
+
 define internal void @f() {
   ret void
 }
 
 ; ASM-LABEL:f:
 ; ASM-NEXT: .Lf$__0:
-; ASM-NEXT: 	bx	lr
+; ASM-NEXT:     bx      lr
+
 
+
+; DIS-LABEL:00000000 <f>:
 ; IASM-LABEL:f:
-; IASM-NEXT: 	.byte 0x1e
-; IASM-NEXT: 	.byte 0xff
-; IASM-NEXT: 	.byte 0x2f
-; IASM-NEXT: 	.byte 0xe1
-
-; IASM-NEXT: 	.byte 0x70
-; IASM-NEXT: 	.byte 0x0
-; IASM-NEXT: 	.byte 0x20
-; IASM-NEXT: 	.byte 0xe1
-
-; IASM-NEXT: 	.byte 0x70
-; IASM-NEXT: 	.byte 0x0
-; IASM-NEXT: 	.byte 0x20
-; IASM-NEXT: 	.byte 0xe1
-
-; IASM-NEXT: 	.byte 0x70
-; IASM-NEXT: 	.byte 0x0
-; IASM-NEXT: 	.byte 0x20
-; IASM-NEXT: 	.byte 0xe1
+
+; DIS-NEXT:   0:        e12fff1e
+; IASM-NEXT:    .byte 0x1e
+; IASM-NEXT:    .byte 0xff
+; IASM-NEXT:    .byte 0x2f
+; IASM-NEXT:    .byte 0xe1
+
+; DIS-NEXT:   4:        e7fedef0
+; IASM-NEXT:    .byte 0xf0
+; IASM-NEXT:    .byte 0xde
+; IASM-NEXT:    .byte 0xfe
+; IASM-NEXT:    .byte 0xe7
+
+; DIS-NEXT:   8:        e7fedef0
+; IASM-NEXT:    .byte 0xf0
+; IASM-NEXT:    .byte 0xde
+; IASM-NEXT:    .byte 0xfe
+; IASM-NEXT:    .byte 0xe7
+
+; DIS-NEXT:   c:        e7fedef0
+; IASM-NEXT:    .byte 0xf0
+; IASM-NEXT:    .byte 0xde
+; IASM-NEXT:    .byte 0xfe
+; IASM-NEXT:    .byte 0xe7
+
+define internal void @ignore() {
+  ret void
+}
+
+; ASM-LABEL:ignore:
+; DIS-LABEL:00000010 <ignore>:
+; IASM-LABEL:ignore: