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| author | Florian Hahn <flo@fhahn.com> | 2019-06-26 09:16:57 +0000 |
|---|---|---|
| committer | Florian Hahn <flo@fhahn.com> | 2019-06-26 09:16:57 +0000 |
| commit | 4c11b5268ca295b156159bed9d520fcb85fcf068 (patch) | |
| tree | d13a913da4f35d28152d49cba61539bb8f663f03 /llvm/test/Transforms/LoopUnroll/runtime-li.ll | |
| parent | 46ce9e4fff45e9f744d8424f00386d650975fd31 (diff) | |
| download | bcm5719-llvm-4c11b5268ca295b156159bed9d520fcb85fcf068.tar.gz bcm5719-llvm-4c11b5268ca295b156159bed9d520fcb85fcf068.zip | |
[LoopUnroll] Add support for loops with exiting headers and uncond latches.
This patch generalizes the UnrollLoop utility to support loops that exit
from the header instead of the latch. Usually, LoopRotate would take care
of must of those cases, but in some cases (e.g. -Oz), LoopRotate does
not kick in.
Codesize impact looks relatively neutral on ARM64 with -Oz + LTO.
Program master patch diff
External/S.../CFP2006/447.dealII/447.dealII 629060.00 627676.00 -0.2%
External/SPEC/CINT2000/176.gcc/176.gcc 1245916.00 1244932.00 -0.1%
MultiSourc...Prolangs-C/simulator/simulator 86100.00 86156.00 0.1%
MultiSourc...arks/Rodinia/backprop/backprop 66212.00 66252.00 0.1%
MultiSourc...chmarks/Prolangs-C++/life/life 67276.00 67312.00 0.1%
MultiSourc...s/Prolangs-C/compiler/compiler 69824.00 69788.00 -0.1%
MultiSourc...Prolangs-C/assembler/assembler 86672.00 86696.00 0.0%
Reviewers: efriedma, vsk, paquette
Reviewed By: paquette
Differential Revision: https://reviews.llvm.org/D61962
llvm-svn: 364398
Diffstat (limited to 'llvm/test/Transforms/LoopUnroll/runtime-li.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnroll/runtime-li.ll | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/runtime-li.ll b/llvm/test/Transforms/LoopUnroll/runtime-li.ll index 5494c8e9da7..a4a9b920289 100644 --- a/llvm/test/Transforms/LoopUnroll/runtime-li.ll +++ b/llvm/test/Transforms/LoopUnroll/runtime-li.ll @@ -17,12 +17,15 @@ header.outer: ; preds = %latch.outer, %entry br label %header.inner header.inner: ; preds = %latch.inner, %header.outer + %tmp5 = load i64, i64* %q1, align 8 + %tmp6 = icmp eq double* %p, %arg + br i1 undef, label %exiting.inner, label %latch.outer + +exiting.inner: ; preds = %latch.inner, %header.outer br i1 undef, label %latch.inner, label %latch.outer latch.inner: ; preds = %header.inner - %tmp5 = load i64, i64* %q1, align 8 store i64 %tmp5, i64* %q2, align 8 - %tmp6 = icmp eq double* %p, %arg br label %header.inner latch.outer: ; preds = %header.inner |
