blob: 230912538d2365859391f22febd445211d56c747 [file] [log] [blame]
; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | 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) {
br label %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
ret void