| ; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-dynamic-cost-savings-discount=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=60 | FileCheck %s |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; When examining gep-instructions we shouldn't consider them simplified if the |
| ; corresponding memory access isn't simplified. Doing the opposite might bias |
| ; our estimate, so that we might decide to unroll even a simple memcpy loop. |
| ; |
| ; Thus, the following loop shouldn't be unrolled: |
| ; CHECK-LABEL: @not_simplified_geps |
| ; CHECK: br i1 % |
| ; CHECK: ret void |
| define void @not_simplified_geps(i32* noalias %b, i32* noalias %c) { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ] |
| %arrayidx1 = getelementptr inbounds i32, i32* %b, i64 %iv.0 |
| %x1 = load i32, i32* %arrayidx1, align 4 |
| %arrayidx2 = getelementptr inbounds i32, i32* %c, i64 %iv.0 |
| store i32 %x1, i32* %arrayidx2, align 4 |
| %iv.1 = add nuw nsw i64 %iv.0, 1 |
| %exitcond = icmp eq i64 %iv.1, 10 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: |
| ret void |
| } |
