switch (IntrinID) {
default:
break;
- case Intrinsic::aarch64_crypto_sha1h:
+ case Intrinsic::aarch64_crypto_sha1h: {
Register DstReg = I.getOperand(0).getReg();
Register SrcReg = I.getOperand(2).getReg();
I.eraseFromParent();
return true;
}
+ case Intrinsic::frameaddress:
+ case Intrinsic::returnaddress: {
+ MachineFunction &MF = *I.getParent()->getParent();
+ MachineFrameInfo &MFI = MF.getFrameInfo();
+
+ unsigned Depth = I.getOperand(2).getImm();
+ Register DstReg = I.getOperand(0).getReg();
+ RBI.constrainGenericRegister(DstReg, AArch64::GPR64RegClass, MRI);
+
+ if (Depth == 0 && IntrinID == Intrinsic::returnaddress) {
+ MFI.setReturnAddressIsTaken(true);
+ MF.addLiveIn(AArch64::LR, &AArch64::GPR64spRegClass);
+ I.getParent()->addLiveIn(AArch64::LR);
+ MIRBuilder.buildCopy({DstReg}, {Register(AArch64::LR)});
+ I.eraseFromParent();
+ return true;
+ }
+
+ MFI.setFrameAddressIsTaken(true);
+ Register FrameAddr(AArch64::FP);
+ while (Depth--) {
+ Register NextFrame = MRI.createVirtualRegister(&AArch64::GPR64spRegClass);
+ auto Ldr =
+ MIRBuilder.buildInstr(AArch64::LDRXui, {NextFrame}, {FrameAddr})
+ .addImm(0);
+ constrainSelectedInstRegOperands(*Ldr, TII, TRI, RBI);
+ FrameAddr = NextFrame;
+ }
+
+ if (IntrinID == Intrinsic::frameaddress)
+ MIRBuilder.buildCopy({DstReg}, {FrameAddr});
+ else {
+ MFI.setReturnAddressIsTaken(true);
+ MIRBuilder.buildInstr(AArch64::LDRXui, {DstReg}, {FrameAddr}).addImm(1);
+ }
+
+ I.eraseFromParent();
+ return true;
+ }
+ }
return false;
}
--- /dev/null
+; RUN: llc -mtriple=arm64-apple-ios -global-isel -o - %s | FileCheck %s
+
+define i8* @rt0(i32 %x) nounwind readnone {
+entry:
+; CHECK-LABEL: rt0:
+; CHECK: mov x0, x29
+ %0 = tail call i8* @llvm.frameaddress(i32 0)
+ ret i8* %0
+}
+
+define i8* @rt2() nounwind readnone {
+entry:
+; CHECK-LABEL: rt2:
+; CHECK: ldr x[[reg:[0-9]+]], [x29]
+; CHECK: ldr x0, [x[[reg]]]
+ %0 = tail call i8* @llvm.frameaddress(i32 2)
+ ret i8* %0
+}
+
+declare i8* @llvm.frameaddress(i32) nounwind readnone
--- /dev/null
+; RUN: llc -mtriple=arm64-apple-ios -global-isel -o - %s | FileCheck %s
+
+define i8* @rt0(i32 %x) nounwind readnone {
+entry:
+; CHECK-LABEL: rt0:
+; CHECK-NOT: stp
+; CHECK: mov x0, x30
+ %0 = tail call i8* @llvm.returnaddress(i32 0)
+ ret i8* %0
+}
+
+define i8* @rt2() nounwind readnone {
+entry:
+; CHECK-LABEL: rt2:
+; CHECK: ldr x[[reg:[0-9]+]], [x29]
+; CHECK: ldr x[[reg]], [x[[reg]]]
+; CHECK: ldr x0, [x[[reg]], #8]
+ %0 = tail call i8* @llvm.returnaddress(i32 2)
+ ret i8* %0
+}
+
+declare i8* @llvm.returnaddress(i32) nounwind readnone