102f76b2d7
This patch extends the alias analysis for temporary arrays in Flang. With this extension, Flang can now determine that the temporary array [a, b, c] does not alias with arrayD in Fortran code: ``` integer :: a, b, c integer :: arrayD(3) arrayD = [ a, b, c ] ```
49 lines
2.7 KiB
Plaintext
49 lines
2.7 KiB
Plaintext
// Use --mlir-disable-threading so that the AA queries are serialized
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// as well as its diagnostic output.
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// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
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// Fortran source code:
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// program TestTmpArrayAssignment
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// integer :: a, b, c
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// integer :: arrayD(3)
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//
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// arrayD = [ a, b, c ]
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// end program TestTmpArrayAssignment
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// CHECK-LABEL: Testing : "_QPTestTmpArrayAssignment"
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// CHECK-DAG: ArrayD#0 <-> tmp_array#0: NoAlias
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func.func @_QPTestTmpArrayAssignment() attributes {fir.bindc_name = "testtmparrayassignment"} {
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%0 = fir.alloca i32 {bindc_name = "a", uniq_name = "_QFEa"}
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%1:2 = hlfir.declare %0 {uniq_name = "_QFEa"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
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%c3 = arith.constant 3 : index
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%2 = fir.alloca !fir.array<3xi32> {bindc_name = "arrayd", uniq_name = "_QFEarrayd", test.ptr = "ArrayD" }
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%3 = fir.shape %c3 : (index) -> !fir.shape<1>
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%4:2 = hlfir.declare %2(%3) {uniq_name = "_QFEarrayd"} : (!fir.ref<!fir.array<3xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<3xi32>>, !fir.ref<!fir.array<3xi32>>)
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%5 = fir.alloca i32 {bindc_name = "b", uniq_name = "_QFEb"}
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%6:2 = hlfir.declare %5 {uniq_name = "_QFEb"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
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%7 = fir.alloca i32 {bindc_name = "c", uniq_name = "_QFEc"}
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%8:2 = hlfir.declare %7 {uniq_name = "_QFEc"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
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%c3_0 = arith.constant 3 : index
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%c1 = arith.constant 1 : index
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%c1_1 = arith.constant 1 : index
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%9 = fir.allocmem !fir.array<3xi32> {bindc_name = ".tmp.arrayctor", uniq_name = ""}
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%10 = fir.shape %c3_0 : (index) -> !fir.shape<1>
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%11:2 = hlfir.declare %9(%10) {uniq_name = ".tmp.arrayctor"} : (!fir.heap<!fir.array<3xi32>>, !fir.shape<1>) -> (!fir.heap<!fir.array<3xi32>>, !fir.heap<!fir.array<3xi32>>)
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%12 = fir.load %1#0 : !fir.ref<i32>
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%13 = arith.addi %c1, %c1_1 : index
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%14 = hlfir.designate %11#0 (%c1) : (!fir.heap<!fir.array<3xi32>>, index) -> !fir.ref<i32>
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hlfir.assign %12 to %14 : i32, !fir.ref<i32>
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%15 = fir.load %6#0 : !fir.ref<i32>
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%16 = arith.addi %13, %c1_1 : index
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%17 = hlfir.designate %11#0 (%13) : (!fir.heap<!fir.array<3xi32>>, index) -> !fir.ref<i32>
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hlfir.assign %15 to %17 : i32, !fir.ref<i32>
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%18 = fir.load %8#0 : !fir.ref<i32>
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%19 = hlfir.designate %11#0 (%16) : (!fir.heap<!fir.array<3xi32>>, index) -> !fir.ref<i32>
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hlfir.assign %18 to %19 : i32, !fir.ref<i32>
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%true = arith.constant true
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%20 = hlfir.as_expr %11#0 move %true {test.ptr = "tmp_array"}: (!fir.heap<!fir.array<3xi32>>, i1) -> !hlfir.expr<3xi32>
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hlfir.assign %20 to %4#0 : !hlfir.expr<3xi32>, !fir.ref<!fir.array<3xi32>>
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hlfir.destroy %20 : !hlfir.expr<3xi32>
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return
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}
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