Add NOP to ARM IR lowering.

tests_lit/llvm2ice_tests/nop-insertion.ll

Index: tests_lit/llvm2ice_tests/nop-insertion.ll
diff --git a/tests_lit/llvm2ice_tests/nop-insertion.ll b/tests_lit/llvm2ice_tests/nop-insertion.ll
index bfefdcc9672c112451f170cfe5940fe2a3b57f68..edacff9efcb76ce182e0c4d042e8a2dbdaa73fa6 100644
--- a/tests_lit/llvm2ice_tests/nop-insertion.ll
+++ b/tests_lit/llvm2ice_tests/nop-insertion.ll
@@ -17,6 +17,10 @@
 ; RUN: %p2i -i %s --filetype=asm --sandbox -a -sz-seed=1 -nop-insertion \
 ; RUN:    -nop-insertion-percentage=50 -max-nops-per-instruction=1 \
 ; RUN:    | FileCheck %s --check-prefix=SANDBOX50
+; RUN: %p2i -i %s --filetype=asm --sandbox --target=arm32 -a -sz-seed=1 \
+; RUN:    -nop-insertion -nop-insertion-percentage=110 \
+; RUN:    -max-nops-per-instruction=2 \
+; RUN:    | FileCheck %s --check-prefix=ARM110P2
 
 
 define internal <4 x i32> @mul_v4i32(<4 x i32> %a, <4 x i32> %b) {
@@ -137,4 +141,69 @@ entry:
 ; SANDBOX50: jmp *%ecx
 ; SANDBOX50: .bundle_unlock
 
+; ARM110P2:       mul_v4i32:
+; ARM110P2-NEXT: .Lmul_v4i32$entry:
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        sub     sp, sp, #48
+; ARM110P2-NEXT:        bic     sp, sp, #3221225472
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        add     ip, sp, #32
+; ARM110P2-NEXT:        bic     ip, ip, #3221225472
+; ARM110P2-NEXT:        vst1.32 q0, [ip]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        # [sp, #32] = def.pseudo
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        add     ip, sp, #16
+; ARM110P2-NEXT:        bic     ip, ip, #3221225472
+; ARM110P2-NEXT:        vst1.32 q1, [ip]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        # [sp, #16] = def.pseudo
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        add     ip, sp, #32
+; ARM110P2-NEXT:        bic     ip, ip, #3221225472
+; ARM110P2-NEXT:        vld1.32 q0, [ip]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        add     ip, sp, #16
+; ARM110P2-NEXT:        bic     ip, ip, #3221225472
+; ARM110P2-NEXT:        vld1.32 q1, [ip]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        vmul.i32        q0, q0, q1
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        vst1.32 q0, [sp]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        # [sp] = def.pseudo
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        vld1.32 q0, [sp]
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        add     sp, sp, #48
+; ARM110P2-NEXT:        bic     sp, sp, #3221225472
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        .bundle_lock
+; ARM110P2-NEXT:        bic     lr, lr, #3221225487
+; ARM110P2-NEXT:        bx      lr
+; ARM110P2-NEXT:        .bundle_unlock
+; ARM110P2-NEXT:        nop
+; ARM110P2-NEXT:        nop
+
 }