diff options
| author | Michael Kuperstein <mkuper@google.com> | 2016-10-06 18:58:24 +0000 |
|---|---|---|
| committer | Michael Kuperstein <mkuper@google.com> | 2016-10-06 18:58:24 +0000 |
| commit | 1ac52953b403748dfc8631e18183f5718a7ea793 (patch) | |
| tree | b23f60742ae4b84524e0e9b59c9a13c4c16c4e91 /test/CodeGen/PowerPC/pr27078.ll | |
| parent | 33fe838cadecf80640d1c95bc5054dd9afa47f58 (diff) | |
[DAG] Generalize build_vector -> vector_shuffle combine for more than 2 inputs
This generalizes the build_vector -> vector_shuffle combine to support any
number of inputs. The idea is to create a binary tree of shuffles, where
the first layer performs pairwise shuffles of the input vectors placing each
input element into the correct lane, and the rest of the tree blends these
shuffles together.
This doesn't try to be smart and create any sort of "optimal" shuffles.
The assumption is that even a "poor" shuffle sequence is better than extracting
and inserting the elements one by one.
Differential Revision: https://reviews.llvm.org/D24683
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283480 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/pr27078.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/pr27078.ll | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/test/CodeGen/PowerPC/pr27078.ll b/test/CodeGen/PowerPC/pr27078.ll index a35e21dbc57..b100e3a5ba5 100644 --- a/test/CodeGen/PowerPC/pr27078.ll +++ b/test/CodeGen/PowerPC/pr27078.ll @@ -9,12 +9,11 @@ define <4 x float> @bar(float* %p, float* %q) { %6 = shufflevector <12 x float> %5, <12 x float> undef, <4 x i32> <i32 0, i32 3, i32 6, i32 9> ret <4 x float> %6 -; CHECK: xxspltw -; CHECK-NEXT: xxspltw -; CHECK-NEXT: xxspltw +; CHECK: vsldoi ; CHECK-NEXT: vmrghw -; CHECK-NEXT: vmrghw -; CHECK-NEXT: xxswapd +; CHECK-NEXT: vmrglw +; CHECK-NEXT: vsldoi +; CHECK-NEXT: vsldoi ; CHECK-NEXT: vsldoi ; CHECK-NEXT: blr } |