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| author | Eric Christopher <echristo@gmail.com> | 2019-04-17 04:52:47 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@gmail.com> | 2019-04-17 04:52:47 +0000 |
| commit | cee313d288a4faf0355d76fb6e0e927e211d08a5 (patch) | |
| tree | d386075318d761197779a96e5d8fc0dc7b06342b /llvm/test/Transforms/LoopUnroll/runtime-loop5.ll | |
| parent | c3d6a929fdd92fd06d4304675ade8d7210ee711a (diff) | |
| download | bcm5719-llvm-cee313d288a4faf0355d76fb6e0e927e211d08a5.tar.gz bcm5719-llvm-cee313d288a4faf0355d76fb6e0e927e211d08a5.zip | |
Revert "Temporarily Revert "Add basic loop fusion pass.""
The reversion apparently deleted the test/Transforms directory.
Will be re-reverting again.
llvm-svn: 358552
Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/runtime-loop5.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/runtime-loop5.ll | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/runtime-loop5.ll b/llvm/test/Transforms/LoopUnroll/runtime-loop5.ll new file mode 100644 index 00000000000..ebb9a85600b --- /dev/null +++ b/llvm/test/Transforms/LoopUnroll/runtime-loop5.ll @@ -0,0 +1,49 @@ +; 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 + +; RUN: opt < %s -S -passes='require<opt-remark-emit>,unroll' -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s +; RUN: opt < %s -S -passes='require<opt-remark-emit>,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 + +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 + +; UNROLL-16-NOT: for.body.epil: +; UNROLL-4: for.body.epil: + +for.end: ; preds = %for.body, %entry + %sum.0.lcssa = phi i3 [ 0, %entry ], [ %add, %for.body ] + ret i3 %sum.0.lcssa +} |
