[xray] Allow instrumenting only function entry and/or only function exit
Extend -fxray-instrumentation-bundle to split function-entry and
function-exit into two separate options, so that it is possible to
instrument only function entry or only function exit. For use cases
that only care about one or the other this will save significant overhead
and code size.
Differential Revision: https://reviews.llvm.org/D72890
diff --git a/clang/lib/Basic/XRayInstr.cpp b/clang/lib/Basic/XRayInstr.cpp
index ef2470f..79052e0 100644
--- a/clang/lib/Basic/XRayInstr.cpp
+++ b/clang/lib/Basic/XRayInstr.cpp
@@ -16,13 +16,17 @@
namespace clang {
XRayInstrMask parseXRayInstrValue(StringRef Value) {
- XRayInstrMask ParsedKind = llvm::StringSwitch<XRayInstrMask>(Value)
- .Case("all", XRayInstrKind::All)
- .Case("custom", XRayInstrKind::Custom)
- .Case("function", XRayInstrKind::Function)
- .Case("typed", XRayInstrKind::Typed)
- .Case("none", XRayInstrKind::None)
- .Default(XRayInstrKind::None);
+ XRayInstrMask ParsedKind =
+ llvm::StringSwitch<XRayInstrMask>(Value)
+ .Case("all", XRayInstrKind::All)
+ .Case("custom", XRayInstrKind::Custom)
+ .Case("function",
+ XRayInstrKind::FunctionEntry | XRayInstrKind::FunctionExit)
+ .Case("function-entry", XRayInstrKind::FunctionEntry)
+ .Case("function-exit", XRayInstrKind::FunctionExit)
+ .Case("typed", XRayInstrKind::Typed)
+ .Case("none", XRayInstrKind::None)
+ .Default(XRayInstrKind::None);
return ParsedKind;
}