GNU Compiler Collection (GCC) Internals: GIMPLE_COND

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#### 11.7.6 `GIMPLE_COND`

GIMPLE function: gimple gimple_build_cond (enum tree_code pred_code, tree lhs, tree rhs, tree t_label, tree f_label)

  Build a `GIMPLE_COND` statement. `A` `GIMPLE_COND` statement compares `LHS` and `RHS` and if the condition in `PRED_CODE` is true, jump to the label in `t_label`, otherwise jump to the label in `f_label`. `PRED_CODE` are relational operator tree codes like `EQ_EXPR`, `LT_EXPR`, `LE_EXPR`, `NE_EXPR`, etc.

GIMPLE function: gimple gimple_build_cond_from_tree (tree cond, tree t_label, tree f_label)

  Build a `GIMPLE_COND` statement from the conditional expression tree `COND`. `T_LABEL` and `F_LABEL` are as in `gimple_build_cond`.

GIMPLE function: enum tree_code gimple_cond_code (gimple g)

  Return the code of the predicate computed by conditional statement `G`.

GIMPLE function: void gimple_cond_set_code (gimple g, enum tree_code code)

  Set `CODE` to be the predicate code for the conditional statement `G`.

GIMPLE function: tree gimple_cond_lhs (gimple g)

  Return the `LHS` of the predicate computed by conditional statement `G`.

GIMPLE function: void gimple_cond_set_lhs (gimple g, tree lhs)

  Set `LHS` to be the `LHS` operand of the predicate computed by conditional statement `G`.

GIMPLE function: tree gimple_cond_rhs (gimple g)

  Return the `RHS` operand of the predicate computed by conditional `G`.

GIMPLE function: void gimple_cond_set_rhs (gimple g, tree rhs)

  Set `RHS` to be the `RHS` operand of the predicate computed by conditional statement `G`.

GIMPLE function: tree gimple_cond_true_label (gimple g)

  Return the label used by conditional statement `G` when its predicate evaluates to true.

GIMPLE function: void gimple_cond_set_true_label (gimple g, tree label)

  Set `LABEL` to be the label used by conditional statement `G` when its predicate evaluates to true.

GIMPLE function: void gimple_cond_set_false_label (gimple g, tree label)

  Set `LABEL` to be the label used by conditional statement `G` when its predicate evaluates to false.

GIMPLE function: tree gimple_cond_false_label (gimple g)

  Return the label used by conditional statement `G` when its predicate evaluates to false.

GIMPLE function: void gimple_cond_make_false (gimple g)

  Set the conditional `COND_STMT` to be of the form ’if (1 == 0)’.

GIMPLE function: void gimple_cond_make_true (gimple g)

  Set the conditional `COND_STMT` to be of the form ’if (1 == 1)’.

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