1 ; RUN: llc < %s -march=x86-64 -relocation-model=static -mtriple=x86_64-unknown-linux-gnu -asm-verbose=0 | FileCheck %s 2 3 ; The inner loop should require only one add (and no leas either). 4 ; rdar://8100380 5 6 ; CHECK: BB0_2: 7 ; CHECK-NEXT: movb $0, flags(%rcx) 8 ; CHECK-NEXT: addq %rax, %rcx 9 ; CHECK-NEXT: cmpq $8192, %rcx 10 ; CHECK-NEXT: jl 11 12 @flags = external global [8192 x i8], align 16 ; <[8192 x i8]*> [#uses=1] 13 14 define void @foo() nounwind { 15 entry: 16 br label %bb 17 18 bb: ; preds = %entry 19 br label %bb7 20 21 bb7: ; preds = %bb, %bb17 22 %tmp8 = phi i64 [ %tmp18, %bb17 ], [ 2, %bb ] ; <i64> [#uses=2] 23 br label %bb10 24 25 bb10: ; preds = %bb7 26 br label %bb11 27 28 bb11: ; preds = %bb10, %bb11 29 %tmp12 = phi i64 [ %tmp14, %bb11 ], [ 2, %bb10 ] ; <i64> [#uses=2] 30 %tmp13 = getelementptr inbounds [8192 x i8], [8192 x i8]* @flags, i64 0, i64 %tmp12 ; <i8*> [#uses=1] 31 store i8 0, i8* %tmp13, align 1 32 %tmp14 = add nsw i64 %tmp12, %tmp8 ; <i64> [#uses=2] 33 %tmp15 = icmp slt i64 %tmp14, 8192 ; <i1> [#uses=1] 34 br i1 %tmp15, label %bb11, label %bb16 35 36 bb16: ; preds = %bb11 37 br label %bb17 38 39 bb17: ; preds = %bb16, %bb7 40 %tmp18 = add nsw i64 %tmp8, 1 ; <i64> [#uses=2] 41 %tmp19 = icmp slt i64 %tmp18, 8192 ; <i1> [#uses=1] 42 br i1 %tmp19, label %bb7, label %bb20 43 44 bb20: ; preds = %bb17 45 br label %bb21 46 47 bb21: ; preds = %bb20, %entry 48 ret void 49 } 50
