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27c201aa1d
This allows conversion of a ParallelLoop from N induction variables to some nuber of induction variables less than N. The first intended use of this is for the GPUDialect to convert ParallelLoops to iterate over 3 dimensions so they can be launched as GPU Kernels. To implement this: - Normalize each iteration space of the ParallelLoop - Use the same induction variable in a new ParallelLoop for multiple original iterations. - Split the new induction variable back into the original set of values inside the body of the ParallelLoop. Subscribers: mgorny, mehdi_amini, rriddle, jpienaar, burmako, shauheen, antiagainst, nicolasvasilache, arpith-jacob, mgester, lucyrfox, aartbik, liufengdb, Joonsoo, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D76363
53 lines
2.6 KiB
MLIR
53 lines
2.6 KiB
MLIR
// RUN: mlir-opt %s -pass-pipeline='func(parallel-loop-collapsing{collapsed-indices-0=0,3 collapsed-indices-1=1,4 collapsed-indices-2=2}, canonicalize)' | FileCheck %s
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// CHECK-LABEL: func @parallel_many_dims() {
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func @parallel_many_dims() {
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// CHECK: [[VAL_0:%.*]] = constant 6 : index
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// CHECK: [[VAL_1:%.*]] = constant 7 : index
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// CHECK: [[VAL_2:%.*]] = constant 9 : index
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// CHECK: [[VAL_3:%.*]] = constant 10 : index
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// CHECK: [[VAL_4:%.*]] = constant 12 : index
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// CHECK: [[VAL_5:%.*]] = constant 13 : index
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// CHECK: [[VAL_6:%.*]] = constant 3 : index
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// CHECK: [[VAL_7:%.*]] = constant 0 : index
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// CHECK: [[VAL_8:%.*]] = constant 1 : index
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// CHECK: [[VAL_9:%.*]] = constant 2 : index
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%c0 = constant 0 : index
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%c1 = constant 1 : index
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%c2 = constant 2 : index
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%c3 = constant 3 : index
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%c4 = constant 4 : index
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%c5 = constant 5 : index
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%c6 = constant 6 : index
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%c7 = constant 7 : index
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%c8 = constant 8 : index
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%c9 = constant 9 : index
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%c10 = constant 10 : index
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%c11 = constant 11 : index
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%c12 = constant 12 : index
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%c13 = constant 13 : index
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%c14 = constant 14 : index
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// CHECK: loop.parallel ([[VAL_10:%.*]], [[VAL_11:%.*]], [[VAL_12:%.*]]) = ([[VAL_7]], [[VAL_7]], [[VAL_7]]) to ([[VAL_9]], [[VAL_8]], [[VAL_8]]) step ([[VAL_8]], [[VAL_8]], [[VAL_8]]) {
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loop.parallel (%i0, %i1, %i2, %i3, %i4) = (%c0, %c3, %c6, %c9, %c12) to (%c2, %c5, %c8, %c11, %c14)
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step (%c1, %c4, %c7, %c10, %c13) {
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// CHECK: [[VAL_13:%.*]] = remi_signed [[VAL_10]], [[VAL_9]] : index
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// CHECK: [[VAL_14:%.*]] = divi_signed [[VAL_10]], [[VAL_8]] : index
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// CHECK: [[VAL_15:%.*]] = divi_signed [[VAL_11]], [[VAL_8]] : index
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// CHECK: [[VAL_16:%.*]] = muli [[VAL_15]], [[VAL_5]] : index
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// CHECK: [[VAL_17:%.*]] = addi [[VAL_16]], [[VAL_4]] : index
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// CHECK: [[VAL_18:%.*]] = muli [[VAL_14]], [[VAL_3]] : index
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// CHECK: [[VAL_19:%.*]] = addi [[VAL_18]], [[VAL_2]] : index
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// CHECK: [[VAL_20:%.*]] = muli [[VAL_12]], [[VAL_1]] : index
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// CHECK: [[VAL_21:%.*]] = addi [[VAL_20]], [[VAL_0]] : index
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// CHECK: [[VAL_22:%.*]] = "magic.op"([[VAL_13]], [[VAL_6]], [[VAL_21]], [[VAL_19]], [[VAL_17]]) : (index, index, index, index, index) -> index
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%result = "magic.op"(%i0, %i1, %i2, %i3, %i4): (index, index, index, index, index) -> index
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}
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return
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}
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// CHECK: loop.yield
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// CHECK: }
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// CHECK: return
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// CHECK: }
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