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Code Issues 1 Releases Wiki Activity

Correct pointer arith type checking.

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This commit is contained in:
Calvin Rose 2024-11-24 20:06:16 -06:00
parent 0fb1773c19
commit d345e551f1
2 changed files with 13 additions and 6 deletions
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3
examples/sysir/frontend.janet
View File

@ -72,7 +72,8 @@
(add-prim-type 's16 's16)
(add-prim-type 'u16 'u16)
(add-prim-type 'byte 'u8)
(array/push into ~(type-pointer pointer uint))
(add-prim-type 'void 'void)
(array/push into ~(type-pointer pointer void))
(make-type 'pointer)
(sysir/asm ctx into)
ctx)

16
src/core/sysir.c
View File

@ -894,16 +894,17 @@ static void rcheck_pointer_equals(JanetSysIR *sysir, uint32_t preg, uint32_t elr
JanetSysIRLinkage *linkage = sysir->linkage;
uint32_t t1 = janet_sys_optype(sysir, preg);
if (linkage->type_defs[t1].prim != JANET_PRIM_POINTER) {
janet_panicf("type failure in %p, expected pointer for array, got %p", sysir->error_ctx, tname(sysir, t1));
janet_panicf("type failure in %p, expected pointer, got %p", sysir->error_ctx, tname(sysir, t1));
}
uint32_t tp = linkage->type_defs[t1].pointer.type;
JanetPrim tpprim = linkage->type_defs[tp].prim;
uint32_t t2 = janet_sys_optype(sysir, elreg);
if (t2 != tp && tpprim != JANET_PRIM_VOID) { /* void pointer is compatible with everything TODO - can we get rid of this? */
janet_panicf("type failure in %p, %p is not compatible with a pointer to %p",
janet_panicf("type failure in %p, %p is not compatible with a pointer to %p (%p)",
sysir->error_ctx,
tname(sysir, t2),
tname(sysir, tp));
tname(sysir, tp),
tname(sysir, t1));
}
}
@ -1040,7 +1041,12 @@ static void rcheck_fgetp(JanetSysIR *sysir, uint32_t dest, uint32_t st, uint32_t
/* Unlike C, only allow pointer on lhs for addition and subtraction */
static void rcheck_pointer_math(JanetSysIR *sysir, uint32_t dest, uint32_t lhs, uint32_t rhs) {
rcheck_pointer_equals(sysir, dest, lhs);
rcheck_equal(sysir, dest, lhs);
JanetSysIRLinkage *linkage = sysir->linkage;
uint32_t t1 = janet_sys_optype(sysir, dest);
if (linkage->type_defs[t1].prim != JANET_PRIM_POINTER) {
janet_panicf("type failure in %p, expected pointer, got %p", sysir->error_ctx, tname(sysir, t1));
}
rcheck_integer(sysir, rhs);
}
@ -1400,7 +1406,7 @@ static void emit_binop(JanetSysIR *ir, JanetBuffer *buffer, JanetBuffer *tempbuf
JanetSysIRLinkage *linkage = ir->linkage;
/* Top-level pointer semantics */
if (linkage->type_defs[operand_type].prim == JANET_PRIM_POINTER) {
if (janet_sys_optype(ir, instruction.three.dest) == JANET_PRIM_POINTER) {
operand_type = linkage->type_defs[operand_type].pointer.type;
is_pointer = 1;
}