1 ; RUN: opt -loop-load-elim -S < %s | FileCheck %s 2 3 ; The accesses to A are independent here but LAA reports it as a loop-carried 4 ; forward dependence. Check that we don't perform st->ld forwarding between 5 ; them. 6 ; 7 ; for (unsigned i = 0; i < 100; i++) { 8 ; A[i][1] = B[i] + 2; 9 ; C[i] = A[i][0] * 2; 10 ; } 11 12 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 13 14 define void @f([2 x i32]* noalias %A, i32* noalias %B, i32* noalias %C, i64 %N) { 15 16 entry: 17 br label %for.body 18 19 for.body: ; preds = %for.body, %entry 20 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] 21 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 22 23 %A1idx = getelementptr inbounds [2 x i32], [2 x i32]* %A, i64 %indvars.iv, i32 1 24 %Bidx = getelementptr inbounds i32, i32* %B, i64 %indvars.iv 25 %Cidx = getelementptr inbounds i32, i32* %C, i64 %indvars.iv 26 %A0idx = getelementptr inbounds [2 x i32], [2 x i32]* %A, i64 %indvars.iv, i32 0 27 28 %b = load i32, i32* %Bidx, align 4 29 %a_p1 = add i32 %b, 2 30 store i32 %a_p1, i32* %A1idx, align 4 31 32 ; CHECK: %a = load i32, i32* %A0idx, align 4 33 %a = load i32, i32* %A0idx, align 4 34 ; CHECK: %c = mul i32 %a, 2 35 %c = mul i32 %a, 2 36 store i32 %c, i32* %Cidx, align 4 37 38 %exitcond = icmp eq i64 %indvars.iv.next, %N 39 br i1 %exitcond, label %for.end, label %for.body 40 41 for.end: ; preds = %for.body 42 ret void 43 } 44
