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Use stringstream in asm generation instead of OutBuffer.

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Besides looking better, this should reduce allocations and copying.
This commit is contained in:
Frits van Bommel
2009-03-12 14:08:57 +01:00
parent c1bd2234a9
commit ff354d59b2
3 changed files with 99 additions and 127 deletions
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24
gen/asmstmt.cpp
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@@ -15,6 +15,8 @@
#include <cassert>
#include <deque>
#include <cstring>
#include <string>
#include <sstream>
//#include "d-lang.h"
//#include "d-codegen.h"
@@ -54,15 +56,12 @@ struct AsmArg {
};
struct AsmCode {
char * insnTemplate;
unsigned insnTemplateLen;
std::string insnTemplate;
std::vector<AsmArg> args;
std::vector<bool> regs;
unsigned dollarLabel;
int clobbersMemory;
AsmCode(int n_regs) {
insnTemplate = NULL;
insnTemplateLen = 0;
regs.resize(n_regs, false);
dollarLabel = 0;
clobbersMemory = 0;
@@ -314,7 +313,6 @@ assert(0);
clobbers.push_back(memory_name);
// }
// Remap argument numbers
for (unsigned i = 0; i < code->args.size(); i++) {
if (arg_map[i] < 0)
@@ -322,8 +320,9 @@ assert(0);
}
bool pct = false;
char * p = code->insnTemplate;
char * q = p + code->insnTemplateLen;
std::string::iterator
p = code->insnTemplate.begin(),
q = code->insnTemplate.end();
//printf("start: %.*s\n", code->insnTemplateLen, code->insnTemplate);
while (p < q) {
if (pct) {
@@ -342,7 +341,7 @@ assert(0);
typedef std::vector<std::string>::iterator It;
if (Logger::enabled()) {
Logger::println("final asm: %.*s", code->insnTemplateLen, code->insnTemplate);
Logger::cout() << "final asm: " << code->insnTemplate << '\n';
std::ostringstream ss;
ss << "GCC-style output constraints: {";
@@ -369,8 +368,6 @@ assert(0);
Logger::println("%s", ss.str().c_str());
}
std::string insnt(code->insnTemplate, code->insnTemplateLen);
// rewrite GCC-style constraints to LLVM-style constraints
std::string llvmOutConstraints;
std::string llvmInConstraints;
@@ -433,7 +430,7 @@ assert(0);
// push asm statement
IRAsmStmt* asmStmt = new IRAsmStmt;
asmStmt->code = insnt;
asmStmt->code = code->insnTemplate;
asmStmt->out_c = llvmOutConstraints;
asmStmt->in_c = llvmInConstraints;
asmStmt->out.insert(asmStmt->out.begin(), output_values.begin(), output_values.end());
@@ -825,10 +822,7 @@ void AsmStatement::toNakedIR(IRState *p)
AsmCode * code = (AsmCode *) asmcode;
// build asm stmt
std::ostringstream& asmstr = p->nakedAsm;
asmstr << "\t";
asmstr.write(code->insnTemplate, code->insnTemplateLen);
asmstr << std::endl;
p->nakedAsm << "\t" << code->insnTemplate << std::endl;
}
void AsmBlockStatement::toNakedIR(IRState *p)