| ; RUN: llc < %s -march=x86-64 -relocation-model=static -mtriple=x86_64-unknown-linux-gnu |
| |
| ; The inner loop should require only one add (and no leas either). |
| ; rdar://8100380 |
| |
| ; CHECK: BB0_4: |
| ; CHECK-NEXT: movb $0, flags(%rdx) |
| ; CHECK-NEXT: addq %rcx, %rdx |
| ; CHECK-NEXT: cmpq $8192, %rdx |
| ; CHECK-NEXT: jl |
| |
| @flags = external global [8192 x i8], align 16 ; <[8192 x i8]*> [#uses=1] |
| |
| define void @foo() nounwind { |
| entry: |
| %tmp = icmp slt i64 2, 8192 ; <i1> [#uses=1] |
| br i1 %tmp, label %bb, label %bb21 |
| |
| bb: ; preds = %entry |
| br label %bb7 |
| |
| bb7: ; preds = %bb, %bb17 |
| %tmp8 = phi i64 [ %tmp18, %bb17 ], [ 2, %bb ] ; <i64> [#uses=2] |
| %tmp9 = icmp slt i64 2, 8192 ; <i1> [#uses=1] |
| br i1 %tmp9, label %bb10, label %bb17 |
| |
| bb10: ; preds = %bb7 |
| br label %bb11 |
| |
| bb11: ; preds = %bb10, %bb11 |
| %tmp12 = phi i64 [ %tmp14, %bb11 ], [ 2, %bb10 ] ; <i64> [#uses=2] |
| %tmp13 = getelementptr inbounds [8192 x i8]* @flags, i64 0, i64 %tmp12 ; <i8*> [#uses=1] |
| store i8 0, i8* %tmp13, align 1 |
| %tmp14 = add nsw i64 %tmp12, %tmp8 ; <i64> [#uses=2] |
| %tmp15 = icmp slt i64 %tmp14, 8192 ; <i1> [#uses=1] |
| br i1 %tmp15, label %bb11, label %bb16 |
| |
| bb16: ; preds = %bb11 |
| br label %bb17 |
| |
| bb17: ; preds = %bb16, %bb7 |
| %tmp18 = add nsw i64 %tmp8, 1 ; <i64> [#uses=2] |
| %tmp19 = icmp slt i64 %tmp18, 8192 ; <i1> [#uses=1] |
| br i1 %tmp19, label %bb7, label %bb20 |
| |
| bb20: ; preds = %bb17 |
| br label %bb21 |
| |
| bb21: ; preds = %bb20, %entry |
| ret void |
| } |
