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be stricter with aliasing

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Refactoring (no logical changes):
- use memcpy in tccgen.c:ieee_finite(double d)
- use union to store attribute flags in Sym
Makefile: "CFLAGS+=-fno-strict-aliasing" basically not necessary
anymore but I left it for now because gcc sometimes behaves
unexpectedly without.

Also:
- configure: back to mode 100755
- tcc.h: remove unused variables tdata/tbss_section
- x86_64-gen.c: adjust gfunc_sret for prototype
This commit is contained in:
grischka
2014-01-07 14:57:07 +01:00
parent 2bd0daabbe
commit 3fe2a95d7f
6 changed files with 92 additions and 89 deletions
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15
x86_64-gen.c
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@ -933,7 +933,8 @@ typedef enum X86_64_Mode {
x86_64_mode_x87
} X86_64_Mode;
static X86_64_Mode classify_x86_64_merge(X86_64_Mode a, X86_64_Mode b) {
static X86_64_Mode classify_x86_64_merge(X86_64_Mode a, X86_64_Mode b)
{
if (a == b)
return a;
else if (a == x86_64_mode_none)
@ -950,7 +951,8 @@ static X86_64_Mode classify_x86_64_merge(X86_64_Mode a, X86_64_Mode b) {
return x86_64_mode_sse;
}
static X86_64_Mode classify_x86_64_inner(CType *ty) {
static X86_64_Mode classify_x86_64_inner(CType *ty)
{
X86_64_Mode mode;
Sym *f;
@ -988,7 +990,8 @@ static X86_64_Mode classify_x86_64_inner(CType *ty) {
assert(0);
}
static X86_64_Mode classify_x86_64_arg(CType *ty, CType *ret, int *psize, int *palign, int *reg_count) {
static X86_64_Mode classify_x86_64_arg(CType *ty, CType *ret, int *psize, int *palign, int *reg_count)
{
X86_64_Mode mode;
int size, align, ret_t = 0;
@ -1045,7 +1048,8 @@ static X86_64_Mode classify_x86_64_arg(CType *ty, CType *ret, int *psize, int *p
return mode;
}
ST_FUNC int classify_x86_64_va_arg(CType *ty) {
ST_FUNC int classify_x86_64_va_arg(CType *ty)
{
/* This definition must be synced with stdarg.h */
enum __va_arg_type {
__va_gen_reg, __va_float_reg, __va_stack
@ -1061,7 +1065,8 @@ ST_FUNC int classify_x86_64_va_arg(CType *ty) {
/* Return the number of registers needed to return the struct, or 0 if
returning via struct pointer. */
int gfunc_sret(CType *vt, CType *ret, int *ret_align) {
ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret, int *ret_align)
{
int size, align, reg_count;
*ret_align = 1; // Never have to re-align return values for x86-64
return (classify_x86_64_arg(vt, ret, &size, &align, &reg_count) != x86_64_mode_memory);