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| author | Faisal Abbas <90.abbasfaisal@gmail.com> | 2022-08-06 13:11:05 +0100 |
|---|---|---|
| committer | Philip Herron <philip.herron@embecosm.com> | 2022-08-25 12:40:26 +0100 |
| commit | 3e6dfca3166f8137deff833bcea7827e38b28fb4 (patch) | |
| tree | e437708889798b7b9c85c8fb1ec6155153043e6d /gcc/rust/backend/rust-constexpr.cc | |
| parent | bbc514d024a232dacfe218706dd07dcf01a51314 (diff) | |
| download | gcc-3e6dfca3166f8137deff833bcea7827e38b28fb4.zip gcc-3e6dfca3166f8137deff833bcea7827e38b28fb4.tar.gz gcc-3e6dfca3166f8137deff833bcea7827e38b28fb4.tar.bz2 | |
rust-constexpr.cc: port over cxx_eval_vector_conditional_expression
Diffstat (limited to 'gcc/rust/backend/rust-constexpr.cc')
| -rw-r--r-- | gcc/rust/backend/rust-constexpr.cc | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-constexpr.cc b/gcc/rust/backend/rust-constexpr.cc index c26b1af..14c2969 100644 --- a/gcc/rust/backend/rust-constexpr.cc +++ b/gcc/rust/backend/rust-constexpr.cc @@ -1233,6 +1233,46 @@ get_or_insert_ctor_field (tree ctor, tree index, int pos_hint = -1) } } +// forked from gcc/cp/constexpr.cc cxx_eval_vector_conditional_expression + +/* Subroutine of cxx_eval_constant_expression. + Attempt to evaluate vector condition expressions. Unlike + cxx_eval_conditional_expression, VEC_COND_EXPR acts like a normal + ternary arithmetics operation, where all 3 arguments have to be + evaluated as constants and then folding computes the result from + them. */ + +static tree +eval_vector_conditional_expression (const constexpr_ctx *ctx, tree t, + bool *non_constant_p, bool *overflow_p) +{ + tree arg1 + = eval_constant_expression (ctx, TREE_OPERAND (t, 0), + /*lval*/ false, non_constant_p, overflow_p); + VERIFY_CONSTANT (arg1); + tree arg2 + = eval_constant_expression (ctx, TREE_OPERAND (t, 1), + /*lval*/ false, non_constant_p, overflow_p); + VERIFY_CONSTANT (arg2); + tree arg3 + = eval_constant_expression (ctx, TREE_OPERAND (t, 2), + /*lval*/ false, non_constant_p, overflow_p); + VERIFY_CONSTANT (arg3); + location_t loc = EXPR_LOCATION (t); + tree type = TREE_TYPE (t); + tree r = fold_ternary_loc (loc, VEC_COND_EXPR, type, arg1, arg2, arg3); + if (r == NULL_TREE) + { + if (arg1 == TREE_OPERAND (t, 0) && arg2 == TREE_OPERAND (t, 1) + && arg3 == TREE_OPERAND (t, 2)) + r = t; + else + r = build3_loc (loc, VEC_COND_EXPR, type, arg1, arg2, arg3); + } + VERIFY_CONSTANT (r); + return r; +} + // forked from gcc/cp/constexpr.cc cxx_eval_bare_aggregate /* Subroutine of cxx_eval_constant_expression. @@ -1772,6 +1812,11 @@ eval_constant_expression (const constexpr_ctx *ctx, tree t, bool lval, jump_target); break; + case VEC_COND_EXPR: + r = eval_vector_conditional_expression (ctx, t, non_constant_p, + overflow_p); + break; + case CONSTRUCTOR: if (TREE_CONSTANT (t) && reduced_constant_expression_p (t)) { |