Introduce a string_ostream string builder facilty
string_ostream is a safe and efficient string builder that combines opaque
stack storage with a built-in ostream interface.
small_string_ostream<bytes> additionally permits an explicit stack storage size
other than the default 128 bytes to be provided. Beyond that, storage is
transferred to the heap.
This convenient class can be used in most places an
std::string+raw_string_ostream pair or SmallString<>+raw_svector_ostream pair
would previously have been used, in order to guarantee consistent access
without byte truncation.
The patch also converts much of LLVM to use the new facility. These changes
include several probable bug fixes for truncated output, a programming error
that's no longer possible with the new interface.
llvm-svn: 211749
diff --git a/llvm/lib/CodeGen/TargetSchedule.cpp b/llvm/lib/CodeGen/TargetSchedule.cpp
index b0f2ca6..d18a514 100644
--- a/llvm/lib/CodeGen/TargetSchedule.cpp
+++ b/llvm/lib/CodeGen/TargetSchedule.cpp
@@ -212,11 +212,10 @@
if (SCDesc->isValid() && !DefMI->getOperand(DefOperIdx).isImplicit()
&& !DefMI->getDesc().OpInfo[DefOperIdx].isOptionalDef()
&& SchedModel.isComplete()) {
- std::string Err;
- raw_string_ostream ss(Err);
- ss << "DefIdx " << DefIdx << " exceeds machine model writes for "
- << *DefMI;
- report_fatal_error(ss.str());
+ string_ostream Err;
+ Err << "DefIdx " << DefIdx << " exceeds machine model writes for "
+ << *DefMI;
+ report_fatal_error(Err.str());
}
#endif
// FIXME: Automatically giving all implicit defs defaultDefLatency is