1 ; RUN: opt -S -unroll-runtime -loop-unroll < %s | FileCheck %s 2 3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 5 ;; Check that we don't emit expensive instructions to compute trip 6 ;; counts when unrolling loops. 7 8 define i32 @test(i64 %v12, i8* %array, i64* %loc) { 9 ; CHECK-LABEL: @test( 10 ; CHECK-NOT: udiv 11 entry: 12 %step = load i64, i64* %loc, !range !0 13 br label %loop 14 15 loop: ; preds = %entry, %loop 16 %k.015 = phi i64 [ %v15, %loop ], [ %v12, %entry ] 17 %v14 = getelementptr inbounds i8, i8* %array, i64 %k.015 18 store i8 0, i8* %v14 19 %v15 = add nuw nsw i64 %k.015, %step 20 %v16 = icmp slt i64 %v15, 8193 21 br i1 %v16, label %loop, label %loopexit 22 23 loopexit: ; preds = %loop 24 ret i32 0 25 } 26 27 !0 = !{i64 1, i64 100} 28
