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Revert "Fix wrong handling of strings..." (almost)

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See commit e588b65390.
Was not "wrong" really, just different. But appears to be outdated.
Now disabled by default (top of tccpp.c: ACCEPT_LF_IN_STRINGS)
Also, in skipped code, just warn.

Also: cleanup "Optimize small structure copying on x86_64"
(commit 3715f1d7ee)
- remove some copy&paste coding (tccgen.c)
- RSI/RDI need to be preserved on windows
- simply don't use under bcheck (this is tinycc)
This commit is contained in:
grischka
2022-07-15 22:31:24 +02:00
parent e588b65390
commit af1abf1f45
8 changed files with 100 additions and 131 deletions
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70
x86_64-gen.c
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@@ -35,6 +35,8 @@
#define RC_RAX 0x0004
#define RC_RCX 0x0008
#define RC_RDX 0x0010
#define RC_RSI 0x0020
#define RC_RDI 0x0040
#define RC_ST0 0x0080 /* only for long double */
#define RC_R8 0x0100
#define RC_R9 0x0200
@@ -105,6 +107,10 @@ enum {
/* define if return values need to be extended explicitely
at caller side (for interfacing with non-TCC compilers) */
#define PROMOTE_RET
#define TCC_TARGET_NATIVE_STRUCT_COPY
ST_FUNC void gen_struct_copy(int size);
/******************************************************/
#else /* ! TARGET_DEFS_ONLY */
/******************************************************/
@@ -124,8 +130,8 @@ ST_DATA const int reg_classes[NB_REGS] = {
0,
0,
0,
0,
0,
RC_RSI,
RC_RDI,
RC_R8,
RC_R9,
RC_R10,
@@ -2228,7 +2234,7 @@ ST_FUNC void gen_increment_tcov (SValue *sv)
}
/* computed goto support */
void ggoto(void)
ST_FUNC void ggoto(void)
{
gcall_or_jmp(1);
vtop--;
@@ -2286,53 +2292,35 @@ ST_FUNC void gen_vla_alloc(CType *type, int align) {
* Assmuing the top part of the stack looks like below,
* src dest src
*/
void gen_struct_copy(int size)
ST_FUNC void gen_struct_copy(int size)
{
save_reg(TREG_RSI);
load(TREG_RSI,vtop);
vtop->r = TREG_RSI;
vswap(); /* dest src src */
save_reg(TREG_RDI);
load(TREG_RDI,vtop);
vtop->r = TREG_RDI;
/* Not aligned by 8bytes */
if (size & 0x04) {
o(0xa5);
}
if (size & 0x02) {
o(0xa566);
}
if (size & 0x01) {
o(0xa4);
}
size >>= 3;
if (!size)
goto done;
/* Although this function is only called when the struct is smaller */
/* than 32 bytes(4 * PTR_SIZE),a common implementation is included */
if (size <= 4 && size) {
switch (size) {
case 4: o(0xa548);
case 3: o(0xa548);
case 2: o(0xa548);
case 1: o(0xa548);
}
int n = size / PTR_SIZE;
#ifdef TCC_TARGET_PE
o(0x5756); /* push rsi, rdi */
#endif
gv2(RC_RDI, RC_RSI);
if (n <= 4) {
while (n)
o(0xa548), --n;
} else {
save_reg(TREG_RCX);
vpushi(size);
load(TREG_RCX,vtop);
vtop->r = TREG_RCX;
vpushi(n);
gv(RC_RCX);
o(0xa548f3);
vpop();
}
done:
if (size & 0x04)
o(0xa5);
if (size & 0x02)
o(0xa566);
if (size & 0x01)
o(0xa4);
#ifdef TCC_TARGET_PE
o(0x5e5f); /* pop rdi, rsi */
#endif
vpop();
vpop();
return;
}
/* end of x86-64 code generator */
/*************************************************************/
#endif /* ! TARGET_DEFS_ONLY */