derek.holloway
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43 lines
2.1 KiB
Fortran
43 lines
2.1 KiB
Fortran
! RUN: %python %S/test_folding.py %s %flang_fc1
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! Tests folding of conditional expressions (Fortran 2023)
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module m
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! Basic scalar folding: constant condition selects the chosen branch.
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logical, parameter :: test_true_int = (.true. ? 1 : 2) == 1
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logical, parameter :: test_false_int = (.false. ? 1 : 2) == 2
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logical, parameter :: test_true_real = (.true. ? 1.0 : 2.0) == 1.0
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logical, parameter :: test_false_real = (.false. ? 1.0 : 2.0) == 2.0
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logical, parameter :: test_true_logical = (.true. ? .true. : .false.)
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logical, parameter :: test_false_logical = (.false. ? .false. : .true.)
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! Multi-branch: right-skewed tree folds correctly.
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! (.true. ? 10 : .false. ? 20 : 30) == 10
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logical, parameter :: test_multi_first = (.true. ? 10 : .false. ? 20 : 30) == 10
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! (.false. ? 10 : .true. ? 20 : 30) == 20
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logical, parameter :: test_multi_second = (.false. ? 10 : .true. ? 20 : 30) == 20
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! (.false. ? 10 : .false. ? 20 : 30) == 30
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logical, parameter :: test_multi_third = (.false. ? 10 : .false. ? 20 : 30) == 30
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! Named constant expressions in branches are folded.
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integer, parameter :: x = 5
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logical, parameter :: test_branch_fold = (.true. ? x + 1 : x + 2) == 6
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! Named constant as condition.
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logical, parameter :: cond = .true.
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logical, parameter :: test_named_cond = (cond ? 42 : 0) == 42
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! Character: constant condition selects the branch value.
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logical, parameter :: test_char = (.true. ? 'yes' : 'no') == 'yes'
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! Non-constant branch: only the selected branch need be constant (F2023 10.1.12).
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integer :: non_const = 99
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logical, parameter :: test_true_const_else_nonconstant = (.true. ? 10 : non_const) == 10
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logical, parameter :: test_false_const_then_nonconstant = (.false. ? non_const : 10) == 10
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! Named constant condition with a non-constant branch.
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logical, parameter :: flag = .true.
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logical, parameter :: test_named_cond_nonconstant = (flag ? 1 : non_const) == 1
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logical, parameter :: flag_false = .false.
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logical, parameter :: test_named_cond_false_nonconstant = (flag_false ? non_const : 1) == 1
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end module
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