1 //===-- StackFrameLayoutAnalysisPass.cpp
2 //------------------------------------===//
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
11 // layout of the stack frame, using the remarks interface. On the CLI it prints
17 //===----------------------------------------------------------------------===//
41 #define DEBUG_TYPE "stack-frame-layout"
45 /// StackFrameLayoutAnalysisPass - This is a pass to dump the stack frame of a
54     Fixed,          // a Fixed slot (e.g. arguments passed on the stack)  enumerator
78         SlotTy = SlotType::Fixed;  in SlotData()
90     // We use this to sort in reverse order, so that the layout is displayed
107     return "Stack Frame Layout Analysis";  in getPassName()
118     //   -Rpass-func-filter=<regex>  in runOnMachineFunction()
123     if (!Ctx.getDiagHandlerPtr()->isAnalysisRemarkEnabled(DEBUG_TYPE))  in runOnMachineFunction()
139     case SlotType::Fixed:  in getTypeString()
140       return "Fixed";  in getTypeString()
148       llvm_unreachable("bad slot type for stack layout");  in getTypeString()
154     // To make it easy to understand the stack layout from the CLI, we want to  in emitStackSlotRemark()
170     //    - Offset: -8  in emitStackSlotRemark()
171     //    - ScalableOffset: -16  in emitStackSlotRemark()
172     // Note: the ScalableOffset entries are added only for slots with non-zero  in emitStackSlotRemark()
176     //   Offset: [SP-8]  in emitStackSlotRemark()
178     // Or with non-zero scalable offset:  in emitStackSlotRemark()
179     //   Offset: [SP-8-16 x vscale]  in emitStackSlotRemark()
181     // Negative offsets will print a leading `-`, so only add `+`  in emitStackSlotRemark()
199         formatv("{0} @ {1}:{2}", N->getName(), N->getFilename(), N->getLine())  in emitSourceLocRemark()
210     return FI->getFrameIndexReferenceFromSP(MF, FrameIdx);  in getStackOffset()
236     // sort the ordering, to match the actual layout in memory  in emitStackFrameLayoutRemarks()
263           if (!MO->isStore())  in genSlotDbgMapping()
266               MO->getPseudoValue());  in genSlotDbgMapping()
269           int FrameIdx = FI->getFrameIndex();  in genSlotDbgMapping()
274             SlotDebugMap[FrameIdx].insert(MI->getDebugVariable());  in genSlotDbgMapping()
287 INITIALIZE_PASS(StackFrameLayoutAnalysisPass, "stack-frame-layout",
288                 "Stack Frame Layout", false, false)
291 /// Returns a newly-created StackFrameLayout pass.