Mercurial > projects > ldc
view gen/programs.cpp @ 1491:360a8e8eea51
Teach stack promotion to walk the CFG when a potential reuse of an allocation
is found to see if it can actually happen instead of just assuming it will.
This allows it to catch cases like
{{{
int i;
Foo f;
while (cond(i))
f = new Foo(i++);
return f.value;
}}}
where it previously wouldn't because a phi using the allocation would appear in
the condition block to propagate it to the use after the loop.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Thu, 11 Jun 2009 02:04:44 +0200 |
parents | a376776e2301 |
children |
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line source
#include "gen/programs.h" #include "llvm/Support/CommandLine.h" #include "llvm/System/Program.h" #include "root.h" // error(char*) #include "mars.h" // fatal() using namespace llvm; static cl::opt<std::string> gcc("gcc", cl::desc("GCC to use for assembling and linking"), cl::Hidden, cl::ZeroOrMore); sys::Path getGcc() { const char *cc = NULL; if (gcc.getNumOccurrences() > 0 && gcc.length() > 0) cc = gcc.c_str(); if (!cc) cc = getenv("CC"); if (!cc) cc = "gcc"; sys::Path path = sys::Program::FindProgramByName(cc); if (path.empty() && !cc) { if (cc) { path.set(cc); } else { error("failed to locate gcc"); fatal(); } } return path; }