1 ; RUN: opt -loop-load-elim -S < %s | FileCheck %s 2 3 ; Make sure we create a preheader if we dont' have one. 4 5 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 6 7 define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N, i1 %C) { 8 entry: 9 br i1 %C, label %for.body, label %for.end 10 11 ; CHECK: for.body.preheader: 12 ; CHECK-NEXT: %load_initial = load i32, i32* %A 13 ; CHECK-NEXT: br label %for.body 14 15 ; CHECK: for.body: 16 for.body: 17 ; CHECK-NEXT: %store_forwarded = phi i32 [ %load_initial, %for.body.preheader ], [ %add, %for.body ] 18 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] 19 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv 20 %load = load i32, i32* %arrayidx, align 4 21 %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv 22 %load_1 = load i32, i32* %arrayidx2, align 4 23 ; CHECK: %add = add i32 %load_1, %store_forwarded 24 %add = add i32 %load_1, %load 25 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 26 %arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next 27 store i32 %add, i32* %arrayidx_next, align 4 28 %exitcond = icmp eq i64 %indvars.iv.next, %N 29 br i1 %exitcond, label %for.end, label %for.body 30 31 for.end: 32 ret void 33 } 34
