diff options
| author | John Hawthorn <[email protected]> | 2021-07-29 16:40:07 -0700 |
|---|---|---|
| committer | Alan Wu <[email protected]> | 2021-10-20 18:19:38 -0400 |
| commit | 5d155fc8a1c44087142539d51b27410388552599 (patch) | |
| tree | da3c22d2a4da901b6dbaab709450b6f3700e4cd5 /yjit_core.c | |
| parent | 786e51217806de2d5ba2eb62154045abdfa9771a (diff) | |
Improve comments for mapping functions
Diffstat (limited to 'yjit_core.c')
| -rw-r--r-- | yjit_core.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/yjit_core.c b/yjit_core.c index 07da8f6723..0d9464e0bd 100644 --- a/yjit_core.c +++ b/yjit_core.c @@ -163,7 +163,10 @@ int type_diff(val_type_t src, val_type_t dst); /** -Set the type of an instruction operand +Upgrade (or "learn") the type of an instruction operand +This value must be compatible and at least as specific as the previously known type. +If this value originated from self, or an lvar, the learned type will be +propagated back to its source. */ void ctx_upgrade_opnd_type(ctx_t* ctx, insn_opnd_t opnd, val_type_t type) { @@ -197,6 +200,11 @@ void ctx_upgrade_opnd_type(ctx_t* ctx, insn_opnd_t opnd, val_type_t type) } } +/* +Get both the type and mapping (where the value originates) of an operand. +This is can be used with ctx_stack_push_mapping or ctx_set_opnd_mapping to copy +a stack value's type while maintaining the mapping. +*/ temp_type_mapping_t ctx_get_opnd_mapping(const ctx_t* ctx, insn_opnd_t opnd) { @@ -223,6 +231,9 @@ ctx_get_opnd_mapping(const ctx_t* ctx, insn_opnd_t opnd) return type_mapping; } +/* +Overwrite both the type and mapping of a stack operand. +*/ void ctx_set_opnd_mapping(ctx_t* ctx, insn_opnd_t opnd, temp_type_mapping_t type_mapping) { |