diff options
Diffstat (limited to 'llvm/test/Transforms/LoopUnroll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll b/llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll index b915b4fdf48..2843e627b3c 100644 --- a/llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll +++ b/llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll @@ -322,3 +322,40 @@ for.end: ; preds = %for.body, %entry ret void } !15 = !{!15, !14} + +; #pragma clang loop unroll_count(3) +; Loop has a runtime trip count. Runtime unrolling should occur and loop +; should be duplicated (original and 3x unrolled). +; +; CHECK-LABEL: @runtime_loop_with_count3( +; CHECK: for.body.prol: +; CHECK: store +; CHECK-NOT: store +; CHECK: br i1 +; CHECK: for.body +; CHECK: store +; CHECK: store +; CHECK: store +; CHECK-NOT: store +; CHECK: br i1 +define void @runtime_loop_with_count3(i32* nocapture %a, i32 %b) { +entry: + %cmp3 = icmp sgt i32 %b, 0 + br i1 %cmp3, label %for.body, label %for.end, !llvm.loop !16 + +for.body: ; preds = %entry, %for.body + %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv + %0 = load i32, i32* %arrayidx, align 4 + %inc = add nsw i32 %0, 1 + store i32 %inc, i32* %arrayidx, align 4 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, %b + br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !16 + +for.end: ; preds = %for.body, %entry + ret void +} +!16 = !{!16, !17} +!17 = !{!"llvm.loop.unroll.count", i32 3} |
