[Mlir-commits] [mlir] 54c927b - [mlir] Add a test exercising partial constant folding of affine min/max

[Alex Zinenko]

Author: Alex Zinenko
Date: 2020-05-07T12:42:03+02:00
New Revision: 54c927b988b874d52d85320b46d9dbbf386e4c54

URL: https://github.com/llvm/llvm-project/commit/54c927b988b874d52d85320b46d9dbbf386e4c54
DIFF: https://github.com/llvm/llvm-project/commit/54c927b988b874d52d85320b46d9dbbf386e4c54.diff

LOG: [mlir] Add a test exercising partial constant folding of affine min/max

This functionality was introduced in a87db48e6fdaf8ce9e7cc479945892b934dd9404
but only only tested indirectly though Linalg tests. Add direct tests.

Added: 
    mlir/test/Dialect/Affine/constant-fold.mlir

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/mlir/test/Dialect/Affine/constant-fold.mlir b/mlir/test/Dialect/Affine/constant-fold.mlir
new file mode 100644
index 000000000000..16bb10060e3f
--- /dev/null
+++ b/mlir/test/Dialect/Affine/constant-fold.mlir
@@ -0,0 +1,62 @@
+// RUN: mlir-opt -test-constant-fold -split-input-file %s | FileCheck %s
+
+// CHECK-LABEL: func @affine_apply
+func @affine_apply(%variable : index) -> (index, index, index) {
+  %c177 = constant 177 : index
+  %c211 = constant 211 : index
+  %N = constant 1075 : index
+
+  // CHECK:[[C1159:%.+]] = constant 1159 : index
+  // CHECK:[[C1152:%.+]] = constant 1152 : index
+  %x0 = affine.apply affine_map<(d0, d1)[S0] -> ( (d0 + 128 * S0) floordiv 128 + d1 mod 128)>
+           (%c177, %c211)[%N]
+  %x1 = affine.apply affine_map<(d0, d1)[S0] -> (128 * (S0 ceildiv 128))>
+           (%c177, %c211)[%N]
+
+  // CHECK:[[C42:%.+]] = constant 42 : index
+  %y = affine.apply affine_map<(d0) -> (42)> (%variable)
+
+  // CHECK: return [[C1159]], [[C1152]], [[C42]]
+  return %x0, %x1, %y : index, index, index
+}
+
+// -----
+
+// CHECK: #[[map:.*]] = affine_map<(d0, d1) -> (42, d1)
+
+func @affine_min(%variable: index) -> (index, index) {
+  // CHECK: %[[C42:.*]] = constant 42
+  %c42 = constant 42 : index
+  %c44 = constant 44 : index
+  // Partial folding will use a 
diff erent map.
+  // CHECK: %[[r:.*]] = affine.min #[[map]](%[[C42]], %{{.*}})
+  %0 = affine.min affine_map<(d0, d1) -> (d0, d1)>(%c42, %variable)
+
+  // Full folding will remove the operation entirely.
+  // CHECK-NOT: affine.min
+  %1 = affine.min affine_map<(d0, d1) -> (d0, d1)>(%c42, %c44)
+
+  // CHECK: return %[[r]], %[[C42]]
+  return %0, %1 : index, index
+}
+
+// -----
+
+// CHECK: #[[map:.*]] = affine_map<(d0, d1) -> (42, d1)
+
+func @affine_min(%variable: index) -> (index, index) {
+  // CHECK: %[[C42:.*]] = constant 42
+  %c42 = constant 42 : index
+  // CHECK: %[[C44:.*]] = constant 44
+  %c44 = constant 44 : index
+  // Partial folding will use a 
diff erent map.
+  // CHECK: %[[r:.*]] = affine.max #[[map]](%[[C42]], %{{.*}})
+  %0 = affine.max affine_map<(d0, d1) -> (d0, d1)>(%c42, %variable)
+
+  // Full folding will remove the operation entirely.
+  // CHECK-NOT: affine.max
+  %1 = affine.max affine_map<(d0, d1) -> (d0, d1)>(%c42, %c44)
+
+  // CHECK: return %[[r]], %[[C44]]
+  return %0, %1 : index, index
+}