1 ; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s 2 ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll-full)' -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s 3 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4 5 ; When examining gep-instructions we shouldn't consider them simplified if the 6 ; corresponding memory access isn't simplified. Doing the opposite might bias 7 ; our estimate, so that we might decide to unroll even a simple memcpy loop. 8 ; 9 ; Thus, the following loop shouldn't be unrolled: 10 ; CHECK-LABEL: @not_simplified_geps 11 ; CHECK: br i1 % 12 ; CHECK: ret void 13 define void @not_simplified_geps(i32* noalias %b, i32* noalias %c) { 14 entry: 15 br label %for.body 16 17 for.body: 18 %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ] 19 %arrayidx1 = getelementptr inbounds i32, i32* %b, i64 %iv.0 20 %x1 = load i32, i32* %arrayidx1, align 4 21 %arrayidx2 = getelementptr inbounds i32, i32* %c, i64 %iv.0 22 store i32 %x1, i32* %arrayidx2, align 4 23 %iv.1 = add nuw nsw i64 %iv.0, 1 24 %exitcond = icmp eq i64 %iv.1, 10 25 br i1 %exitcond, label %for.end, label %for.body 26 27 for.end: 28 ret void 29 } 30
