1 ; RUN: opt -loop-load-elim -S < %s -enable-new-pm=0 | FileCheck %s
2 ; New PM does not allow a pass to require another pass to have been run
3 ; RUN: opt -passes=loop-simplify,loop-load-elim -S < %s | FileCheck %s
5 ; Make sure we create a preheader if we don't have one.
7 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
9 define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N, i1 %C) {
11 br i1 %C, label %for.body, label %for.end
13 ; CHECK: for.body.preheader:
14 ; CHECK-NEXT: %load_initial = load i32, i32* %A
15 ; CHECK-NEXT: br label %for.body
19 ; CHECK-NEXT: %store_forwarded = phi i32 [ %load_initial, %for.body.preheader ], [ %add, %for.body ]
20 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
21 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
22 %load = load i32, i32* %arrayidx, align 4
23 %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
24 %load_1 = load i32, i32* %arrayidx2, align 4
25 ; CHECK: %add = add i32 %load_1, %store_forwarded
26 %add = add i32 %load_1, %load
27 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
28 %arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
29 store i32 %add, i32* %arrayidx_next, align 4
30 %exitcond = icmp eq i64 %indvars.iv.next, %N
31 br i1 %exitcond, label %for.end, label %for.body