1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -relocation-model=static -mtriple=x86_64-unknown-linux-gnu | FileCheck %s 3 4; The inner loop should require only one add (and no leas either). 5; rdar://8100380 6 7@flags = external dso_local global [8192 x i8], align 16 ; <ptr> [#uses=1] 8 9define void @foo() nounwind { 10; CHECK-LABEL: foo: 11; CHECK: # %bb.0: # %entry 12; CHECK-NEXT: movl $2, %eax 13; CHECK-NEXT: .p2align 4 14; CHECK-NEXT: .LBB0_1: # %bb7 15; CHECK-NEXT: # =>This Loop Header: Depth=1 16; CHECK-NEXT: # Child Loop BB0_2 Depth 2 17; CHECK-NEXT: movl $2, %ecx 18; CHECK-NEXT: .p2align 4 19; CHECK-NEXT: .LBB0_2: # %bb11 20; CHECK-NEXT: # Parent Loop BB0_1 Depth=1 21; CHECK-NEXT: # => This Inner Loop Header: Depth=2 22; CHECK-NEXT: movb $0, flags(%rcx) 23; CHECK-NEXT: addq %rax, %rcx 24; CHECK-NEXT: cmpq $8192, %rcx # imm = 0x2000 25; CHECK-NEXT: jl .LBB0_2 26; CHECK-NEXT: # %bb.3: # %bb16 27; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1 28; CHECK-NEXT: incq %rax 29; CHECK-NEXT: cmpq $8192, %rax # imm = 0x2000 30; CHECK-NEXT: jl .LBB0_1 31; CHECK-NEXT: # %bb.4: # %bb20 32; CHECK-NEXT: retq 33entry: 34 br label %bb 35 36bb: ; preds = %entry 37 br label %bb7 38 39bb7: ; preds = %bb, %bb17 40 %tmp8 = phi i64 [ %tmp18, %bb17 ], [ 2, %bb ] ; <i64> [#uses=2] 41 br label %bb10 42 43bb10: ; preds = %bb7 44 br label %bb11 45 46bb11: ; preds = %bb10, %bb11 47 %tmp12 = phi i64 [ %tmp14, %bb11 ], [ 2, %bb10 ] ; <i64> [#uses=2] 48 %tmp13 = getelementptr inbounds [8192 x i8], ptr @flags, i64 0, i64 %tmp12 ; <ptr> [#uses=1] 49 store i8 0, ptr %tmp13, align 1 50 %tmp14 = add nsw i64 %tmp12, %tmp8 ; <i64> [#uses=2] 51 %tmp15 = icmp slt i64 %tmp14, 8192 ; <i1> [#uses=1] 52 br i1 %tmp15, label %bb11, label %bb16 53 54bb16: ; preds = %bb11 55 br label %bb17 56 57bb17: ; preds = %bb16, %bb7 58 %tmp18 = add nsw i64 %tmp8, 1 ; <i64> [#uses=2] 59 %tmp19 = icmp slt i64 %tmp18, 8192 ; <i1> [#uses=1] 60 br i1 %tmp19, label %bb7, label %bb20 61 62bb20: ; preds = %bb17 63 br label %bb21 64 65bb21: ; preds = %bb20, %entry 66 ret void 67} 68