| ; RUN: opt -S -unroll-runtime -loop-unroll < %s | FileCheck %s |
| |
| 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" |
| |
| ;; Check that we don't emit expensive instructions to compute trip |
| ;; counts when unrolling loops. |
| |
| define i32 @test(i64 %v12, i8* %array, i64* %loc) { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NOT: udiv |
| entry: |
| %step = load i64, i64* %loc, !range !0 |
| br label %loop |
| |
| loop: ; preds = %entry, %loop |
| %k.015 = phi i64 [ %v15, %loop ], [ %v12, %entry ] |
| %v14 = getelementptr inbounds i8, i8* %array, i64 %k.015 |
| store i8 0, i8* %v14 |
| %v15 = add nuw nsw i64 %k.015, %step |
| %v16 = icmp slt i64 %v15, 8193 |
| br i1 %v16, label %loop, label %loopexit |
| |
| loopexit: ; preds = %loop |
| ret i32 0 |
| } |
| |
| !0 = !{i64 1, i64 100} |
