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Diffstat (limited to 'test/Transforms/LoopUnroll/runtime-loop5.ll')
-rw-r--r-- | test/Transforms/LoopUnroll/runtime-loop5.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/runtime-loop5.ll b/test/Transforms/LoopUnroll/runtime-loop5.ll new file mode 100644 index 0000000..e8d5177 --- /dev/null +++ b/test/Transforms/LoopUnroll/runtime-loop5.ll @@ -0,0 +1,45 @@ +; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s +; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-count=4 | FileCheck --check-prefix=UNROLL-4 %s + +; Given that the trip-count of this loop is a 3-bit value, we cannot +; safely unroll it with a count of anything more than 8. + +define i3 @test(i3* %a, i3 %n) { +; UNROLL-16-LABEL: @test( +; UNROLL-4-LABEL: @test( +entry: + %cmp1 = icmp eq i3 %n, 0 + br i1 %cmp1, label %for.end, label %for.body + +; UNROLL-16-NOT: for.body.prol: +; UNROLL-4: for.body.prol: + +for.body: ; preds = %for.body, %entry +; UNROLL-16-LABEL: for.body: +; UNROLL-4-LABEL: for.body: + %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] + %sum.02 = phi i3 [ %add, %for.body ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i3, i3* %a, i64 %indvars.iv + +; UNROLL-16-LABEL: for.body +; UNROLL-16-LABEL: getelementptr +; UNROLL-16-LABEL-NOT: getelementptr + +; UNROLL-4-LABEL: getelementptr +; UNROLL-4-LABEL: getelementptr +; UNROLL-4-LABEL: getelementptr +; UNROLL-4-LABEL: getelementptr + + %0 = load i3, i3* %arrayidx + %add = add nsw i3 %0, %sum.02 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i3 + %exitcond = icmp eq i3 %lftr.wideiv, %n + br i1 %exitcond, label %for.end, label %for.body + +; UNROLL-16-LABEL: for.end +; UNROLL-4-LABEL: for.end +for.end: ; preds = %for.body, %entry + %sum.0.lcssa = phi i3 [ 0, %entry ], [ %add, %for.body ] + ret i3 %sum.0.lcssa +} |