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| author | Matthew Simpson <mssimpso@codeaurora.org> | 2016-09-21 16:50:24 +0000 |
|---|---|---|
| committer | Matthew Simpson <mssimpso@codeaurora.org> | 2016-09-21 16:50:24 +0000 |
| commit | 15869f86d84927ceb965eb5eaecabf523d8c7eb9 (patch) | |
| tree | 51acc1d72ca8e54fd0fcbee7742c1f98b0be05f1 /llvm/test/Transforms/LoopVectorize/induction.ll | |
| parent | 2e217b87cbd844720ed2e46d003d6fb59ad087d9 (diff) | |
| download | bcm5719-llvm-15869f86d84927ceb965eb5eaecabf523d8c7eb9.tar.gz bcm5719-llvm-15869f86d84927ceb965eb5eaecabf523d8c7eb9.zip | |
[LV] Don't emit unused scalars for uniform instructions
If we identify an instruction as uniform after vectorization, we know that we
should only use the value corresponding to the first vector lane of each unroll
iteration. However, when scalarizing such instructions, we still produce values
for the other vector lanes. This patch prevents us from generating the unused
scalars.
Differential Revision: https://reviews.llvm.org/D24275
llvm-svn: 282087
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize/induction.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/induction.ll | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/induction.ll b/llvm/test/Transforms/LoopVectorize/induction.ll index 8adb6a35383..1866263c3b5 100644 --- a/llvm/test/Transforms/LoopVectorize/induction.ll +++ b/llvm/test/Transforms/LoopVectorize/induction.ll @@ -78,21 +78,15 @@ loopexit: ; CHECK: vector.body: ; CHECK: %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] ; CHECK: %[[i0:.+]] = add i64 %index, 0 -; CHECK: %[[i1:.+]] = add i64 %index, 1 ; CHECK: getelementptr inbounds i64, i64* %a, i64 %[[i0]] -; CHECK: getelementptr inbounds i64, i64* %a, i64 %[[i1]] ; ; UNROLL-NO-IC-LABEL: @scalarize_induction_variable_01( ; UNROLL-NO-IC: vector.body: ; UNROLL-NO-IC: %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] ; UNROLL-NO-IC: %[[i0:.+]] = add i64 %index, 0 -; UNROLL-NO-IC: %[[i1:.+]] = add i64 %index, 1 ; UNROLL-NO-IC: %[[i2:.+]] = add i64 %index, 2 -; UNROLL-NO-IC: %[[i3:.+]] = add i64 %index, 3 ; UNROLL-NO-IC: getelementptr inbounds i64, i64* %a, i64 %[[i0]] -; UNROLL-NO-IC: getelementptr inbounds i64, i64* %a, i64 %[[i1]] ; UNROLL-NO-IC: getelementptr inbounds i64, i64* %a, i64 %[[i2]] -; UNROLL-NO-IC: getelementptr inbounds i64, i64* %a, i64 %[[i3]] ; ; IND-LABEL: @scalarize_induction_variable_01( ; IND: vector.body: @@ -611,9 +605,7 @@ exit: ; CHECK: %vec.ind = phi <2 x i32> [ %[[START]], %vector.ph ], [ %vec.ind.next, %vector.body ] ; CHECK: %offset.idx = add i32 %i, %index ; CHECK: %[[A1:.*]] = add i32 %offset.idx, 0 -; CHECK: %[[A2:.*]] = add i32 %offset.idx, 1 ; CHECK: %[[G1:.*]] = getelementptr inbounds i32, i32* %a, i32 %[[A1]] -; CHECK: %[[G2:.*]] = getelementptr inbounds i32, i32* %a, i32 %[[A2]] ; CHECK: %[[G3:.*]] = getelementptr i32, i32* %[[G1]], i32 0 ; CHECK: %[[B1:.*]] = bitcast i32* %[[G3]] to <2 x i32>* ; CHECK: store <2 x i32> %vec.ind, <2 x i32>* %[[B1]] |
