derek.holloway
7502bf64a4
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70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
// Test normalization behavior of fir.do_loop lowering to scf.
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//
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// RUN: fir-opt %s --fir-to-scf --allow-unregistered-dialect | FileCheck %s
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// Test that loops with unknown step are normalized.
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//
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// e.g.
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// subroutine loop(a,lb,ub,step)
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// integer :: a(8), lb, ub, step
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// do i = lb, ub, step
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// a(i) = i
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// enddo
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// end
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// CHECK-LABEL: func.func @unknown_step_
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// CHECK: [[LB:%[0-9]+]] = arith.index_cast %arg0
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// CHECK: [[UB:%[0-9]+]] = arith.index_cast %arg1
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// CHECK: [[STEP:%[0-9]+]] = arith.index_cast %arg2
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// CHECK: [[SUB:%[0-9]+]] = arith.subi [[UB]], [[LB]] : index
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// CHECK-NEXT: [[ADD:%[0-9]+]] = arith.addi [[SUB]], [[STEP]] : index
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// CHECK-NEXT: [[DIV:%[0-9]+]] = arith.divsi [[ADD]], [[STEP]] : index
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// CHECK: scf.for %arg4 = %c0{{.*}} to [[DIV]] step %c1{{.*}}
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// CHECK-NEXT: [[IVMUL:%[0-9]+]] = arith.muli %arg4, [[STEP]] : index
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// CHECK-NEXT: [[IVADD:%[0-9]+]] = arith.addi [[LB]], [[IVMUL]] : index
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// CHECK-NEXT: memref.store [[IVADD]], %arg3[]
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func.func @unknown_step_(%arg0: i64, %arg1: i64, %arg2: i64, %arg3: memref<index>) {
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%0 = arith.index_cast %arg0 : i64 to index
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%1 = arith.index_cast %arg1 : i64 to index
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%2 = arith.index_cast %arg2 : i64 to index
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fir.do_loop %arg4 = %0 to %1 step %2 {
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memref.store %arg4, %arg3[] : memref<index>
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}
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return
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}
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// Test that loops with known negative step are normalized.
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//
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// e.g.
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// subroutine loop(a)
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// integer :: a(8)
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// do i = 8, 1, -1
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// a(i) = i
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// enddo
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// end
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// CHECK-LABEL: func.func @negative_step_
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// CHECK: [[LB:%.+]] = arith.constant 8
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// CHECK: [[UB:%.+]] = arith.constant 1
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// CHECK: [[STEP:%.+]] = arith.constant -1
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// CHECK: [[SUB:%[0-9]+]] = arith.subi [[UB]], [[LB]] : index
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// CHECK-NEXT: [[ADD:%[0-9]+]] = arith.addi [[SUB]], [[STEP]] : index
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// CHECK-NEXT: [[DIV:%[0-9]+]] = arith.divsi [[ADD]], [[STEP]] : index
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// CHECK: scf.for %arg1 = %c0{{.*}} to [[DIV]] step %c1{{.*}}
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// CHECK-NEXT: [[IVMUL:%[0-9]+]] = arith.muli %arg1, [[STEP]] : index
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// CHECK-NEXT: [[IVADD:%[0-9]+]] = arith.addi [[LB]], [[IVMUL]] : index
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// CHECK-NEXT: memref.store [[IVADD]], %arg0[]
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func.func @negative_step_(%arg0: memref<index>) {
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%c8 = arith.constant 8 : index
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%c1 = arith.constant 1 : index
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%c-1 = arith.constant -1 : index
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fir.do_loop %arg1 = %c8 to %c1 step %c-1 {
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memref.store %arg1, %arg0[] : memref<index>
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}
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return
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}
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