================
@@ -5980,6 +5987,64 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo
&CallInfo,
return Ret;
}
+static bool endsWithRoundingModeSuffix(StringRef FuncName) {
+ size_t Underscore = FuncName.find_last_of("_");
+ if (Underscore == StringRef::npos || Underscore < 2)
+ return false;
+ StringRef Suffix = FuncName.substr(Underscore + 1);
+ static const StringRef RMSuffixes[] = {"rtz", "rte", "rtp", "rtn", "rhaz",
+ "rz", "rn", "ru", "rd"};
+ for (auto RM : RMSuffixes) {
+ if (Suffix == RM)
+ return true;
+ }
+ return false;
+}
+
+bool CodeGenFunction::requiresDynamicRounding(const CGCallee &Callee) {
+ if (Callee.isOrdinary()) {
+ const Decl *CalleeDecl =
Callee.getAbstractInfo().getCalleeDecl().getDecl();
+ if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CalleeDecl)) {
+ IdentifierInfo *FuncNameII = FD->getDeclName().getAsIdentifierInfo();
+ if (FuncNameII) {
+ StringRef FuncName = FuncNameII->getName();
+ // If a reserved identifier ends with rounding mode suffix preceded by
+ // underscore, this function does not need the previous dynamic
rounding
+ // mode to be set.
+ if (isReservedInAllContexts(
+ FuncNameII->isReserved(getContext().getLangOpts()))) {
+ if (endsWithRoundingModeSuffix(FuncName))
+ return false;
+ }
+ }
+ }
+ }
+ return true;
+}
+
+/// Sets dynamic rounding mode for the function called in the region where
+/// pragma FENV_ROUND is in effect.
+void CodeGenFunction::setRoundingModeForCall(const CGCallee &Callee) {
+ if (Target.hasStaticRounding() || Callee.isBuiltin() ||
+ !requiresDynamicRounding(Callee))
+ return;
+ if (!CurrentRoundingIsStatic || !DynamicRoundingMode)
+ return;
+ Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::set_rounding),
+ DynamicRoundingMode);
+ CurrentRoundingIsStatic = false;
----------------
jcranmer-intel wrote:
I'm not seeing logic here to effect the proper handling of, e.g., `sqrt`. Is
this planned in a future patch? If so, add in a TODO note.
https://github.com/llvm/llvm-project/pull/89617
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