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1; RUN: opt < %s -S -passes=loop-unroll -unroll-threshold=50 | FileCheck %s2 3; Make sure this loop is completely unrolled...4; CHECK-LABEL: @test15; CHECK: for.body:6; CHECK-NOT: for.end:7 8define i32 @test1(ptr nocapture %a) nounwind uwtable readonly {9entry:10 br label %for.body11 12for.body: ; preds = %for.body, %entry13 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]14 %sum.01 = phi i32 [ 0, %entry ], [ %add, %for.body ]15 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv16 %0 = load i32, ptr %arrayidx, align 417 18 ; This loop will be completely unrolled, even with these extra instructions,19 ; but only because they're ephemeral (and, thus, free).20 %1 = add nsw i32 %0, 221 %2 = add nsw i32 %1, 422 %3 = add nsw i32 %2, 423 %4 = add nsw i32 %3, 424 %5 = add nsw i32 %4, 425 %6 = add nsw i32 %5, 426 %7 = add nsw i32 %6, 427 %8 = add nsw i32 %7, 428 %9 = add nsw i32 %8, 429 %10 = add nsw i32 %9, 430 %ca = icmp sgt i32 %10, -731 call void @llvm.assume(i1 %ca)32 33 %add = add nsw i32 %0, %sum.0134 %indvars.iv.next = add i64 %indvars.iv, 135 %lftr.wideiv = trunc i64 %indvars.iv.next to i3236 %exitcond = icmp eq i32 %lftr.wideiv, 537 br i1 %exitcond, label %for.end, label %for.body38 39for.end: ; preds = %for.body40 ret i32 %add41}42 43declare void @llvm.assume(i1) nounwind44 45