================
@@ -22156,3 +22156,25 @@ namespace llvm::RISCVVIntrinsicsTable {
#include "RISCVGenSearchableTables.inc"
} // namespace llvm::RISCVVIntrinsicsTable
+
+bool RISCVTargetLowering::hasInlineStackProbe(const MachineFunction &MF) const
{
+
+ // If the function specifically requests inline stack probes, emit them.
+ if (MF.getFunction().hasFnAttribute("probe-stack"))
+ return MF.getFunction().getFnAttribute("probe-stack").getValueAsString() ==
+ "inline-asm";
+
+ return false;
+}
+
+unsigned RISCVTargetLowering::getStackProbeSize(const MachineFunction &MF,
+ unsigned StackAlign) const {
+ // The default stack probe size is 4096 if the function has no
+ // stack-probe-size attribute.
+ const Function &Fn = MF.getFunction();
+ unsigned StackProbeSize =
+ Fn.getFnAttributeAsParsedInteger("stack-probe-size", 4096);
+ // Round down to the stack alignment.
+ StackProbeSize &= ~(StackAlign - 1);
----------------
topperc wrote:
Use `alignDown` from MathExtras.h?
https://github.com/llvm/llvm-project/pull/117612
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