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[svn r325] Removed dead code.

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Added license info to code from GDC (David Friedman permitted us to use the files under the Artistic License).
Added asmLabel check to DtoGoto to avoid jumping into inline asm. Doesn't work currently as LabelDsymbol::asmLabel is never set to true.
This commit is contained in:
Christian Kamm
2008-06-25 23:42:38 +02:00
parent 7250b0630c
commit b064c794de
6 changed files with 12 additions and 86 deletions
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68
gen/asmstmt.cpp
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@@ -1,6 +1,5 @@
// Taken from GDC source tree, licence unclear?
//
// Taken from an earlier version of DMD -- why is it missing from 0.79?
// Taken from GDC source tree. Original by David Friedman.
// Released under the Artistic License found in dmd/artistic.txt
#include "gen/llvm.h"
#include "llvm/InlineAsm.h"
@@ -131,69 +130,6 @@ int AsmStatement::comeFrom()
return FALSE;
}
/* GCC does not support jumps from asm statements. When optimization
is turned on, labels referenced only from asm statements will not
be output at the correct location. There are ways around this:
1) Reference the label with a reachable goto statement
2) Have reachable computed goto in the function
3) Hack cfgbuild.c to act as though there is a computed goto.
These are all pretty bad, but if would be nice to be able to tell
GCC not to optimize in this case (even on per label/block basis).
The current solution is output our own private labels (as asm
statements) along with the "real" label. If the label happens to
be referred to by a goto statement, the "real" label will also be
output in the correct location.
Also had to add 'asmLabelNum' to LabelDsymbol to indicate it needs
special processing.
(junk) d-lang.cc:916:case LABEL_DECL: // C doesn't do this. D needs this for referencing labels in inline assembler since there may be not goto referencing it.
*/
static unsigned d_priv_asm_label_serial = 0;
// may need to make this target-specific
static void d_format_priv_asm_label(char * buf, unsigned n)
{
//ASM_GENERATE_INTERNAL_LABEL(buf, "LDASM", n);//inserts a '*' for use with assemble_name
assert(0);
sprintf(buf, ".LDASM%u", n);
}
void
d_expand_priv_asm_label(IRState * irs, unsigned n)
{
/* char buf[64];
d_format_priv_asm_label(buf, n);
strcat(buf, ":");
tree insnt = build_string(strlen(buf), buf);
#if D_GCC_VER < 40
expand_asm(insnt, 1);
#else
tree t = d_build_asm_stmt(insnt, NULL_TREE, NULL_TREE, NULL_TREE);
ASM_VOLATILE_P( t ) = 1;
ASM_INPUT_P( t) = 1; // what is this doing?
irs->addExp(t);
#endif*/
}
// StringExp::toIR usually adds a NULL. We don't want that...
/*static tree
naturalString(Expression * e)
{
// don't fail, just an error?
assert(e->op == TOKstring);
StringExp * s = (StringExp *) e;
assert(s->sz == 1);
return build_string(s->len, (char *) s->string);
}*/
#include "d-asm-i386.h"