.addImm(-16);
It = MBB.insert(It, STRXpre);
+ const TargetSubtargetInfo &STI = MF.getSubtarget();
+ const MCRegisterInfo *MRI = STI.getRegisterInfo();
+ unsigned DwarfReg = MRI->getDwarfRegNum(AArch64::LR, true);
+
+ // Add a CFI saying the stack was moved 16 B down.
+ int64_t StackPosEntry =
+ MF.addFrameInst(MCCFIInstruction::createDefCfaOffset(nullptr, 16));
+ BuildMI(MBB, It, DebugLoc(), get(AArch64::CFI_INSTRUCTION))
+ .addCFIIndex(StackPosEntry)
+ .setMIFlags(MachineInstr::FrameSetup);
+
+ // Add a CFI saying that the LR that we want to find is now 16 B higher than
+ // before.
+ int64_t LRPosEntry =
+ MF.addFrameInst(MCCFIInstruction::createOffset(nullptr, DwarfReg, 16));
+ BuildMI(MBB, It, DebugLoc(), get(AArch64::CFI_INSTRUCTION))
+ .addCFIIndex(LRPosEntry)
+ .setMIFlags(MachineInstr::FrameSetup);
+
// Insert a restore before the terminator for the function.
MachineInstr *LDRXpost = BuildMI(MF, DebugLoc(), get(AArch64::LDRXpost))
.addReg(AArch64::SP, RegState::Define)
--- /dev/null
+# RUN: llc -simplify-mir -mtriple=aarch64--- -run-pass=machine-outliner -verify-machineinstrs %s -o - | FileCheck %s
+--- |
+ define void @baz() #0 {
+ ret void
+ }
+
+ define void @bar(i32 %a) #0 {
+ ret void
+ }
+
+ attributes #0 = { noredzone }
+...
+---
+
+name: bar
+tracksRegLiveness: true
+body: |
+ bb.0:
+ liveins: $w0, $lr, $w8
+ $sp = frame-setup SUBXri $sp, 32, 0
+ $fp = frame-setup ADDXri $sp, 16, 0
+
+ bb.1:
+ BL @baz, implicit-def dead $lr, implicit $sp
+ $w17 = ORRWri $wzr, 1
+ $w17 = ORRWri $wzr, 1
+ $w0 = ORRWri $wzr, 4
+
+ BL @baz, implicit-def dead $lr, implicit $sp
+ $w17 = ORRWri $wzr, 1
+ $w17 = ORRWri $wzr, 1
+ $w0 = ORRWri $wzr, 3
+
+ BL @baz, implicit-def dead $lr, implicit $sp
+ $w17 = ORRWri $wzr, 1
+ $w17 = ORRWri $wzr, 1
+ $w0 = ORRWri $wzr, 2
+
+ BL @baz, implicit-def dead $lr, implicit $sp
+ $w17 = ORRWri $wzr, 1
+ $w17 = ORRWri $wzr, 1
+ $w0 = ORRWri $wzr, 1
+
+
+ bb.2:
+ $fp, $lr = LDPXi $sp, 2
+ RET undef $lr
+...
+---
+name: baz
+tracksRegLiveness: true
+body: |
+ bb.0:
+ liveins: $w0, $lr, $w8
+ RET undef $lr
+
+# CHECK: name: OUTLINED_FUNCTION_0
+# CHECK-DAG: bb.0:
+# CHECK-NEXT: liveins: $lr
+# CHECK-DAG: frame-setup CFI_INSTRUCTION def_cfa_offset -16
+# CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w30, 16
+# CHECK-NEXT: early-clobber $sp = STRXpre $lr, $sp, -16
+# CHECK-NEXT: BL @baz, implicit-def dead $lr, implicit $sp
+# CHECK-NEXT: $w17 = ORRWri $wzr, 1
+# CHECK-NEXT: $w17 = ORRWri $wzr, 1
+# CHECK-NEXT: early-clobber $sp, $lr = LDRXpost $sp, 16
+# CHECK-NEXT: RET undef $lr