Add POP instruction to ARM integrated assembler.

tests_lit/assembler/arm32/push-pop.ll

Index: tests_lit/assembler/arm32/push-pop.ll
diff --git a/tests_lit/assembler/arm32/push-pop.ll b/tests_lit/assembler/arm32/push-pop.ll
index 5bda8c7ab1299a200aac3cd471e96c4c26aa0c55..c0238f9315cbf8a76ac55939d278e414960227f8 100644
--- a/tests_lit/assembler/arm32/push-pop.ll
+++ b/tests_lit/assembler/arm32/push-pop.ll
@@ -61,7 +61,11 @@ define internal void @SinglePushPop() {
 ; IASM-NEXT:    .byte 0xd0
 ; IASM-NEXT:    .byte 0x8d
 ; IASM-NEXT:    .byte 0xe2
-; IASM-NEXT:    pop     {lr}
+
+; IASM-NEXT:    .byte 0x4
+; IASM-NEXT:    .byte 0xe0
+; IASM-NEXT:    .byte 0x9d
+; IASM-NEXT:    .byte 0xe4
 
 ; IASM:         .byte 0x1e
 ; IASM-NEXT:    .byte 0xff
@@ -141,7 +145,11 @@ define internal i32 @MultPushPop(i32 %v1, i32 %v2) {
 ; IASM-NEXT:    .byte 0xd0
 ; IASM-NEXT:    .byte 0x8d
 ; IASM-NEXT:    .byte 0xe2
-; IASM-NEXT:    pop     {r4, r5, lr}
+
+; IASM-NEXT:    .byte 0x30
+; IASM-NEXT:    .byte 0x40
+; IASM-NEXT:    .byte 0xbd
+; IASM-NEXT:    .byte 0xe8
 
 ; IASM:         .byte 0x1e
 ; IASM-NEXT:    .byte 0xff