empathicqubit/cc65
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Functions with no prototypes might use EAX registers.

Browse source
This commit is contained in:
acqn 2021-01-24 18:19:51 +08:00 • committed by Oliver Schmidt
parent a1992702f8
commit c9ac515286
1 changed files with 17 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
src/cc65/codeinfo.c
View file

@ -493,22 +493,28 @@ fncls_t GetFuncInfo (const char* Name, unsigned int* Use, unsigned int* Chg)
** registers. ** registers.
*/ */
*Use = REG_EAXY; *Use = REG_EAXY;
} else if (D->ParamCount > 0 && } else if ((D->ParamCount > 0 ||
(D->Flags & FD_EMPTY) != 0) &&
(AutoCDecl ? (AutoCDecl ?
IsQualFastcall (E->Type) : IsQualFastcall (E->Type) :
!IsQualCDecl (E->Type))) { !IsQualCDecl (E->Type))) {
/* Will use registers depending on the last param. If the last /* Will use registers depending on the last param. If the last
** param has incomplete type, just assume __EAX__. ** param has incomplete type, or if the function has not been
** prototyped yet, just assume __EAX__.
*/ */
switch (SizeOf (D->LastParam->Type)) { if (D->LastParam != 0) {
case 1u: switch (SizeOf(D->LastParam->Type)) {
*Use = REG_A; case 1u:
break; *Use = REG_A;
case 2u: break;
*Use = REG_AX; case 2u:
break; *Use = REG_AX;
default: break;
*Use = REG_EAX; default:
*Use = REG_EAX;
}
} else {
*Use = REG_EAX;
} }
} else { } else {
/* Will not use any registers */ /* Will not use any registers */