[llvm] r294447 - Revert r294356, "DebugInfo: Track spilled variables in LiveDebugValues"
NAKAMURA Takumi via llvm-commits
llvm-commits at lists.llvm.org
Wed Feb 8 05:49:29 PST 2017
Author: chapuni
Date: Wed Feb 8 07:49:28 2017
New Revision: 294447
URL: http://llvm.org/viewvc/llvm-project?rev=294447&view=rev
Log:
Revert r294356, "DebugInfo: Track spilled variables in LiveDebugValues"
It caused undefined behavior in VarLoc. As far as I investigated,
- VarLoc::VarLoc() treats negative offset value as InvalidKind.
Consider the case that (int64_t)MI.getOperand(1).getImm() is negative and whether it satisfies ((uint64_t)Offset < (1ULL << 32)).
- Comparison operators in VarLoc behave undefined since VarLoc::Loc.Hash is uninitialized in case of InvalidKind.
I guess Offset (in VarLoc) could be made aware of signed, but I am not sure.
So I have reverted it for now.
Removed:
llvm/trunk/test/DebugInfo/MIR/X86/live-debug-values-spill.mir
Modified:
llvm/trunk/lib/CodeGen/LiveDebugValues.cpp
Modified: llvm/trunk/lib/CodeGen/LiveDebugValues.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveDebugValues.cpp?rev=294447&r1=294446&r2=294447&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveDebugValues.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveDebugValues.cpp Wed Feb 8 07:49:28 2017
@@ -24,16 +24,13 @@
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/CodeGen/LexicalScopes.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetRegisterInfo.h"
@@ -64,7 +61,6 @@ class LiveDebugValues : public MachineFu
private:
const TargetRegisterInfo *TRI;
const TargetInstrInfo *TII;
- const TargetFrameLowering *TFI;
LexicalScopes LS;
/// Keeps track of lexical scopes associated with a user value's source
@@ -173,11 +169,6 @@ private:
typedef UniqueVector<VarLoc> VarLocMap;
typedef SparseBitVector<> VarLocSet;
typedef SmallDenseMap<const MachineBasicBlock *, VarLocSet> VarLocInMBB;
- struct SpillDebugPair {
- MachineInstr *SpillInst;
- MachineInstr *DebugInst;
- };
- typedef SmallVector<SpillDebugPair, 4> SpillMap;
/// This holds the working set of currently open ranges. For fast
/// access, this is done both as a set of VarLocIDs, and a map of
@@ -227,21 +218,14 @@ private:
}
};
- bool isSpillInstruction(const MachineInstr &MI, MachineFunction *MF,
- unsigned &Reg);
- int extractSpillBaseRegAndOffset(const MachineInstr &MI, unsigned &Reg);
-
void transferDebugValue(const MachineInstr &MI, OpenRangesSet &OpenRanges,
VarLocMap &VarLocIDs);
- void transferSpillInst(MachineInstr &MI, OpenRangesSet &OpenRanges,
- VarLocMap &VarLocIDs, SpillMap &Spills);
void transferRegisterDef(MachineInstr &MI, OpenRangesSet &OpenRanges,
const VarLocMap &VarLocIDs);
bool transferTerminatorInst(MachineInstr &MI, OpenRangesSet &OpenRanges,
VarLocInMBB &OutLocs, const VarLocMap &VarLocIDs);
bool transfer(MachineInstr &MI, OpenRangesSet &OpenRanges,
- VarLocInMBB &OutLocs, VarLocMap &VarLocIDs, SpillMap &Spills,
- bool transferSpills);
+ VarLocInMBB &OutLocs, VarLocMap &VarLocIDs);
bool join(MachineBasicBlock &MBB, VarLocInMBB &OutLocs, VarLocInMBB &InLocs,
const VarLocMap &VarLocIDs,
@@ -321,21 +305,6 @@ void LiveDebugValues::printVarLocInMBB(c
}
#endif
-/// Given a spill instruction, extract the register and offset used to
-/// address the spill location in a target independent way.
-int LiveDebugValues::extractSpillBaseRegAndOffset(const MachineInstr &MI,
- unsigned &Reg) {
- assert(MI.hasOneMemOperand() &&
- "Spill instruction does not have exactly one memory operand?");
- auto MMOI = MI.memoperands_begin();
- const PseudoSourceValue *PVal = (*MMOI)->getPseudoValue();
- assert(PVal->kind() == PseudoSourceValue::FixedStack &&
- "Inconsistent memory operand in spill instruction");
- int FI = cast<FixedStackPseudoSourceValue>(PVal)->getFrameIndex();
- const MachineBasicBlock *MBB = MI.getParent();
- return TFI->getFrameIndexReference(*MBB->getParent(), FI, Reg);
-}
-
/// End all previous ranges related to @MI and start a new range from @MI
/// if it is a DBG_VALUE instr.
void LiveDebugValues::transferDebugValue(const MachineInstr &MI,
@@ -393,85 +362,6 @@ void LiveDebugValues::transferRegisterDe
OpenRanges.erase(KillSet, VarLocIDs);
}
-/// Decide if @MI is a spill instruction and return true if it is. We use 2
-/// criteria to make this decision:
-/// - Is this instruction a store to a spill slot?
-/// - Is there a register operand that is both used and killed?
-bool LiveDebugValues::isSpillInstruction(const MachineInstr &MI,
- MachineFunction *MF, unsigned &Reg) {
- const MachineFrameInfo &FrameInfo = MF->getFrameInfo();
- int FI;
- const MachineMemOperand *MMO;
-
- // To identify a spill instruction, use the same criteria as in AsmPrinter.
- if (!((TII->isStoreToStackSlotPostFE(MI, FI) ||
- TII->hasStoreToStackSlot(MI, MMO, FI)) &&
- FrameInfo.isSpillSlotObjectIndex(FI)))
- return false;
-
- // In a spill instruction generated by the InlineSpiller the spilled register
- // has its kill flag set. Return false if we don't find such a register.
- Reg = 0;
- for (const MachineOperand &MO : MI.operands()) {
- if (MO.isReg() && MO.isUse() && MO.isKill()) {
- Reg = MO.getReg();
- break;
- }
- }
- return Reg != 0;
-}
-
-/// A spilled register may indicate that we have to end the current range of
-/// a variable and create a new one for the spill location.
-/// We don't want to insert any instructions in transfer(), so we just create
-/// the DBG_VALUE witout inserting it and keep track of it in @Spills.
-/// It will be inserted into the BB when we're done iterating over the
-/// instructions.
-void LiveDebugValues::transferSpillInst(MachineInstr &MI,
- OpenRangesSet &OpenRanges,
- VarLocMap &VarLocIDs,
- SpillMap &Spills) {
- unsigned Reg;
- MachineFunction *MF = MI.getParent()->getParent();
- if (!isSpillInstruction(MI, MF, Reg))
- return;
-
- // Check if the register is the location of a debug value.
- for (unsigned ID : OpenRanges.getVarLocs()) {
- if (VarLocIDs[ID].isDescribedByReg() == Reg) {
- DEBUG(dbgs() << "Spilling Register " << PrintReg(Reg, TRI) << '('
- << VarLocIDs[ID].Var.getVar()->getName() << ")\n");
-
- // Create a DBG_VALUE instruction to describe the Var in its spilled
- // location, but don't insert it yet to avoid invalidating the
- // iterator in our caller.
- unsigned SpillBase;
- int SpillOffset = extractSpillBaseRegAndOffset(MI, SpillBase);
- const MachineInstr *DMI = &VarLocIDs[ID].MI;
- MachineInstr *SpDMI =
- BuildMI(*MF, DMI->getDebugLoc(), DMI->getDesc(), true, SpillBase, 0,
- DMI->getDebugVariable(), DMI->getDebugExpression());
- SpDMI->getOperand(1).setImm(SpillOffset);
- DEBUG(dbgs() << "Creating DBG_VALUE inst for spill: ";
- SpDMI->print(dbgs(), false, TII));
-
- // The newly created DBG_VALUE instruction SpDMI must be inserted after
- // MI. Keep track of the pairing.
- SpillDebugPair MIP = {&MI, SpDMI};
- Spills.push_back(MIP);
-
- // End all previous ranges of Var.
- OpenRanges.erase(VarLocIDs[ID].Var);
-
- // Add the VarLoc to OpenRanges.
- VarLoc VL(*SpDMI, LS);
- unsigned SpillLocID = VarLocIDs.insert(VL);
- OpenRanges.insert(SpillLocID, VL.Var);
- return;
- }
- }
-}
-
/// Terminate all open ranges at the end of the current basic block.
bool LiveDebugValues::transferTerminatorInst(MachineInstr &MI,
OpenRangesSet &OpenRanges,
@@ -497,13 +387,10 @@ bool LiveDebugValues::transferTerminator
/// This routine creates OpenRanges and OutLocs.
bool LiveDebugValues::transfer(MachineInstr &MI, OpenRangesSet &OpenRanges,
- VarLocInMBB &OutLocs, VarLocMap &VarLocIDs,
- SpillMap &Spills, bool transferSpills) {
+ VarLocInMBB &OutLocs, VarLocMap &VarLocIDs) {
bool Changed = false;
transferDebugValue(MI, OpenRanges, VarLocIDs);
transferRegisterDef(MI, OpenRanges, VarLocIDs);
- if (transferSpills)
- transferSpillInst(MI, OpenRanges, VarLocIDs, Spills);
Changed = transferTerminatorInst(MI, OpenRanges, OutLocs, VarLocIDs);
return Changed;
}
@@ -592,11 +479,10 @@ bool LiveDebugValues::ExtendRanges(Machi
bool OLChanged = false;
bool MBBJoined = false;
- VarLocMap VarLocIDs; // Map VarLoc<>unique ID for use in bitvectors.
+ VarLocMap VarLocIDs; // Map VarLoc<>unique ID for use in bitvectors.
OpenRangesSet OpenRanges; // Ranges that are open until end of bb.
- VarLocInMBB OutLocs; // Ranges that exist beyond bb.
- VarLocInMBB InLocs; // Ranges that are incoming after joining.
- SpillMap Spills; // DBG_VALUEs associated with spills.
+ VarLocInMBB OutLocs; // Ranges that exist beyond bb.
+ VarLocInMBB InLocs; // Ranges that are incoming after joining.
DenseMap<unsigned int, MachineBasicBlock *> OrderToBB;
DenseMap<MachineBasicBlock *, unsigned int> BBToOrder;
@@ -608,14 +494,9 @@ bool LiveDebugValues::ExtendRanges(Machi
Pending;
// Initialize every mbb with OutLocs.
- // We are not looking at any spill instructions during the initial pass
- // over the BBs. The LiveDebugVariables pass has already created DBG_VALUE
- // instructions for spills of registers that are known to be user variables
- // within the BB in which the spill occurs.
for (auto &MBB : MF)
for (auto &MI : MBB)
- transfer(MI, OpenRanges, OutLocs, VarLocIDs, Spills,
- /*transferSpills=*/false);
+ transfer(MI, OpenRanges, OutLocs, VarLocIDs);
DEBUG(printVarLocInMBB(MF, OutLocs, VarLocIDs, "OutLocs after initialization",
dbgs()));
@@ -647,18 +528,8 @@ bool LiveDebugValues::ExtendRanges(Machi
if (MBBJoined) {
MBBJoined = false;
Changed = true;
- // Now that we have started to extend ranges across BBs we need to
- // examine spill instructions to see whether they spill registers that
- // correspond to user variables.
for (auto &MI : *MBB)
- OLChanged |= transfer(MI, OpenRanges, OutLocs, VarLocIDs, Spills,
- /*transferSpills=*/true);
-
- // Add any DBG_VALUE instructions necessitated by spills.
- for (auto &SP : Spills)
- MBB->insertAfter(MachineBasicBlock::iterator(*SP.SpillInst),
- SP.DebugInst);
- Spills.clear();
+ OLChanged |= transfer(MI, OpenRanges, OutLocs, VarLocIDs);
DEBUG(printVarLocInMBB(MF, OutLocs, VarLocIDs,
"OutLocs after propagating", dbgs()));
@@ -692,7 +563,6 @@ bool LiveDebugValues::runOnMachineFuncti
TRI = MF.getSubtarget().getRegisterInfo();
TII = MF.getSubtarget().getInstrInfo();
- TFI = MF.getSubtarget().getFrameLowering();
LS.initialize(MF);
bool Changed = ExtendRanges(MF);
Removed: llvm/trunk/test/DebugInfo/MIR/X86/live-debug-values-spill.mir
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/MIR/X86/live-debug-values-spill.mir?rev=294446&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/MIR/X86/live-debug-values-spill.mir (original)
+++ llvm/trunk/test/DebugInfo/MIR/X86/live-debug-values-spill.mir (removed)
@@ -1,468 +0,0 @@
-# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck -check-prefix=GENERATE %s
-# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck -check-prefix=TERMINATE %s
-#
-# Check that spills are recognized in the Live Debug Values pass and that
-# DBG_VALUE instructions are generated to keep track of spilled user
-# variables.
-# In addition we check that the ranges of spilled debug values are properly
-# extended.
-#
-# Test case generated from:
-#
-# extern void use (int);
-# extern void set (int *, int *, int *);
-#
-# int glob0, glob1, glob2, glob3, glob4, glob5;
-#
-# void foo(int b0, int b1, int int0, int int1, int int2,
-# int int3, int int4)
-# {
-# int inta = glob0;
-# int intb = glob1;
-# int intc = glob2;
-# int intd = glob3;
-# int inte = glob4;
-# int intf = glob5;
-# int intg;
-#
-# if (b0)
-# return;
-#
-# int0 += (int1 + int2 + int3) * int4;
-# use(intf);
-# use(inte);
-#
-# if (b1) {
-# set(&inte, &intf, &intg);
-# int0 = (int1 + int2 + int3) * int4;
-# inta = (intb*inte + intc*inte + intd) * inte;
-# }
-# int0 += int4 * inta;
-# use(int0);
-# }
-#
-#
-# Generated with
-# clang -g -O2 -S -emit-llvm -fno-omit-frame-pointer spill1.c
-# llc -stop-after=funclet-layout < spill1.ll > spill1.mir
-#
-# Make sure that we generated DBG_VALUE instructions for the spills
-# GENERATE: bb.1.if.end:
-# GENERATE: MOV32mr %rbp, 1, _, -48, _, killed %edx :: (store 4 into %stack.5)
-# GENERATE-NEXT: DBG_VALUE debug-use %rbp, -48, !26, !38
-# GENERATE: MOV32mr %rbp, 1, _, -52, _, killed %r8d :: (store 4 into %stack.4)
-# GENERATE-NEXT: DBG_VALUE debug-use %rbp, -52, !32, !38
-# GENERATE: MOV32mr %rbp, 1, _, -56, _, killed %esi :: (store 4 into %stack.3)
-# GENERATE-NEXT: DBG_VALUE debug-use %rbp, -56, !34, !38
-#
-# Check that the spill locations that are valid at the end of bb.1.if.end are
-# propagated to subsequent BBs.
-#
-# GENERATE: bb.2.if.then4:
-# GENERATE-NOT: bb.3:
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -56, !34, !38
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -52, !32, !38
-#
-# GENERATE: bb.3:
-# GENERATE-NOT: bb.4.if.end13:
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -56, !34, !38
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -52, !32, !38
-#
-# GENERATE: bb.4.if.end13:
-# GENERATE-NOT: bb.5.cleanup:
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -56, !34, !38
-# GENERATE-DAG: DBG_VALUE debug-use %rbp, -52, !32, !38
-#
-# Check that the spill location rbp-48 (the variable int0) is not propagated
-# because int0 is redefined within the same basic block.
-#
-# TERMINATE: bb.2.if.then4:
-# TERMINATE-NOT: DBG_VALUE debug-use %rbp, -48, !26, !38
---- |
- ; ModuleID = '<stdin>'
- source_filename = "spill1.c"
- target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
- target triple = "x86_64-unknown-linux-gnu"
-
- @glob0 = common local_unnamed_addr global i32 0, align 4, !dbg !0
- @glob1 = common local_unnamed_addr global i32 0, align 4, !dbg !6
- @glob2 = common local_unnamed_addr global i32 0, align 4, !dbg !9
- @glob3 = common local_unnamed_addr global i32 0, align 4, !dbg !11
- @glob4 = common local_unnamed_addr global i32 0, align 4, !dbg !13
- @glob5 = common local_unnamed_addr global i32 0, align 4, !dbg !15
-
- ; Function Attrs: nounwind uwtable
- define void @foo(i32 %b0, i32 %b1, i32 %int0, i32 %int1, i32 %int2, i32 %int3, i32 %int4) local_unnamed_addr #0 !dbg !20 {
- entry:
- %inte = alloca i32, align 4
- %intf = alloca i32, align 4
- %intg = alloca i32, align 4
- tail call void @llvm.dbg.value(metadata i32 %b0, i64 0, metadata !24, metadata !38), !dbg !39
- tail call void @llvm.dbg.value(metadata i32 %b1, i64 0, metadata !25, metadata !38), !dbg !40
- tail call void @llvm.dbg.value(metadata i32 %int0, i64 0, metadata !26, metadata !38), !dbg !41
- tail call void @llvm.dbg.value(metadata i32 %int1, i64 0, metadata !27, metadata !38), !dbg !42
- tail call void @llvm.dbg.value(metadata i32 %int2, i64 0, metadata !28, metadata !38), !dbg !43
- tail call void @llvm.dbg.value(metadata i32 %int3, i64 0, metadata !29, metadata !38), !dbg !44
- tail call void @llvm.dbg.value(metadata i32 %int4, i64 0, metadata !30, metadata !38), !dbg !45
- %0 = load i32, i32* @glob0, align 4, !dbg !46, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !31, metadata !38), !dbg !51
- %1 = load i32, i32* @glob1, align 4, !dbg !52, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %1, i64 0, metadata !32, metadata !38), !dbg !53
- %2 = load i32, i32* @glob2, align 4, !dbg !54, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %2, i64 0, metadata !33, metadata !38), !dbg !55
- %3 = load i32, i32* @glob3, align 4, !dbg !56, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %3, i64 0, metadata !34, metadata !38), !dbg !57
- %4 = bitcast i32* %inte to i8*, !dbg !58
- call void @llvm.lifetime.start(i64 4, i8* nonnull %4) #4, !dbg !58
- %5 = load i32, i32* @glob4, align 4, !dbg !59, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %5, i64 0, metadata !35, metadata !38), !dbg !60
- tail call void @llvm.dbg.value(metadata i32 %5, i64 0, metadata !35, metadata !38), !dbg !60
- store i32 %5, i32* %inte, align 4, !dbg !60, !tbaa !47
- %6 = bitcast i32* %intf to i8*, !dbg !61
- call void @llvm.lifetime.start(i64 4, i8* nonnull %6) #4, !dbg !61
- %7 = load i32, i32* @glob5, align 4, !dbg !62, !tbaa !47
- tail call void @llvm.dbg.value(metadata i32 %7, i64 0, metadata !36, metadata !38), !dbg !63
- tail call void @llvm.dbg.value(metadata i32 %7, i64 0, metadata !36, metadata !38), !dbg !63
- store i32 %7, i32* %intf, align 4, !dbg !63, !tbaa !47
- %8 = bitcast i32* %intg to i8*, !dbg !64
- call void @llvm.lifetime.start(i64 4, i8* nonnull %8) #4, !dbg !64
- %tobool = icmp eq i32 %b0, 0, !dbg !65
- br i1 %tobool, label %if.end, label %cleanup, !dbg !67
-
- if.end: ; preds = %entry
- %add = add nsw i32 %int2, %int1, !dbg !68
- %add1 = add nsw i32 %add, %int3, !dbg !69
- %mul = mul nsw i32 %add1, %int4, !dbg !70
- call void @llvm.dbg.value(metadata i32 %mul, i64 0, metadata !26, metadata !38), !dbg !41
- %add2 = add nsw i32 %mul, %int0, !dbg !71
- tail call void @llvm.dbg.value(metadata i32 %add2, i64 0, metadata !26, metadata !38), !dbg !41
- tail call void @use(i32 %7) #4, !dbg !72
- tail call void @use(i32 %5) #4, !dbg !73
- %tobool3 = icmp eq i32 %b1, 0, !dbg !74
- br i1 %tobool3, label %if.end13, label %if.then4, !dbg !76
-
- if.then4: ; preds = %if.end
- tail call void @llvm.dbg.value(metadata i32* %inte, i64 0, metadata !35, metadata !77), !dbg !60
- tail call void @llvm.dbg.value(metadata i32* %intf, i64 0, metadata !36, metadata !77), !dbg !63
- tail call void @llvm.dbg.value(metadata i32* %intg, i64 0, metadata !37, metadata !77), !dbg !78
- call void @set(i32* nonnull %inte, i32* nonnull %intf, i32* nonnull %intg) #4, !dbg !79
- %9 = load i32, i32* %inte, align 4, !dbg !81, !tbaa !47
- call void @llvm.dbg.value(metadata i32 %9, i64 0, metadata !35, metadata !38), !dbg !60
- %mul833 = add i32 %2, %1, !dbg !82
- %add10 = mul i32 %9, %mul833, !dbg !82
- %add11 = add nsw i32 %add10, %3, !dbg !83
- %mul12 = mul nsw i32 %add11, %9, !dbg !84
- call void @llvm.dbg.value(metadata i32 %mul12, i64 0, metadata !31, metadata !38), !dbg !51
- br label %if.end13, !dbg !85
-
- if.end13: ; preds = %if.then4, %if.end
- %inta.0 = phi i32 [ %mul12, %if.then4 ], [ %0, %if.end ]
- %int0.addr.0 = phi i32 [ %mul, %if.then4 ], [ %add2, %if.end ]
- call void @llvm.dbg.value(metadata i32 %inta.0, i64 0, metadata !31, metadata !38), !dbg !51
- call void @llvm.dbg.value(metadata i32 %int0.addr.0, i64 0, metadata !26, metadata !38), !dbg !41
- %mul14 = mul nsw i32 %inta.0, %int4, !dbg !86
- %add15 = add nsw i32 %int0.addr.0, %mul14, !dbg !87
- call void @llvm.dbg.value(metadata i32 %add15, i64 0, metadata !26, metadata !38), !dbg !41
- call void @use(i32 %add15) #4, !dbg !88
- br label %cleanup, !dbg !89
-
- cleanup: ; preds = %if.end13, %entry
- %10 = bitcast i32* %intg to i8*
- %11 = bitcast i32* %intf to i8*
- %12 = bitcast i32* %inte to i8*
- call void @llvm.lifetime.end(i64 4, i8* nonnull %10) #4, !dbg !89
- call void @llvm.lifetime.end(i64 4, i8* nonnull %11) #4, !dbg !89
- call void @llvm.lifetime.end(i64 4, i8* nonnull %12) #4, !dbg !89
- ret void, !dbg !90
- }
-
- ; Function Attrs: argmemonly nounwind
- declare void @llvm.lifetime.start(i64, i8* nocapture) #1
-
- declare void @use(i32) local_unnamed_addr #2
-
- declare void @set(i32*, i32*, i32*) local_unnamed_addr #2
-
- ; Function Attrs: argmemonly nounwind
- declare void @llvm.lifetime.end(i64, i8* nocapture) #1
-
- ; Function Attrs: nounwind readnone
- declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
-
- ; Function Attrs: nounwind
- declare void @llvm.stackprotector(i8*, i8**) #4
-
- attributes #0 = { nounwind uwtable "no-frame-pointer-elim-non-leaf" }
- attributes #1 = { argmemonly nounwind }
- attributes #2 = { "no-frame-pointer-elim-non-leaf" }
- attributes #3 = { nounwind readnone }
- attributes #4 = { nounwind }
-
- !llvm.dbg.cu = !{!2}
- !llvm.module.flags = !{!17, !18}
- !llvm.ident = !{!19}
-
- !0 = !DIGlobalVariableExpression(var: !1)
- !1 = distinct !DIGlobalVariable(name: "glob0", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 5.0.0 (trunk 292962)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
- !3 = !DIFile(filename: "spill1.c", directory: "/home/test")
- !4 = !{}
- !5 = !{!0, !6, !9, !11, !13, !15}
- !6 = !DIGlobalVariableExpression(var: !7)
- !7 = distinct !DIGlobalVariable(name: "glob1", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
- !9 = !DIGlobalVariableExpression(var: !10)
- !10 = distinct !DIGlobalVariable(name: "glob2", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !11 = !DIGlobalVariableExpression(var: !12)
- !12 = distinct !DIGlobalVariable(name: "glob3", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !13 = !DIGlobalVariableExpression(var: !14)
- !14 = distinct !DIGlobalVariable(name: "glob4", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !15 = !DIGlobalVariableExpression(var: !16)
- !16 = distinct !DIGlobalVariable(name: "glob5", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true)
- !17 = !{i32 2, !"Dwarf Version", i32 4}
- !18 = !{i32 2, !"Debug Info Version", i32 3}
- !19 = !{!"clang version 5.0.0 (trunk 292962)"}
- !20 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 6, type: !21, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !2, variables: !23)
- !21 = !DISubroutineType(types: !22)
- !22 = !{null, !8, !8, !8, !8, !8, !8, !8}
- !23 = !{!24, !25, !26, !27, !28, !29, !30, !31, !32, !33, !34, !35, !36, !37}
- !24 = !DILocalVariable(name: "b0", arg: 1, scope: !20, file: !3, line: 6, type: !8)
- !25 = !DILocalVariable(name: "b1", arg: 2, scope: !20, file: !3, line: 6, type: !8)
- !26 = !DILocalVariable(name: "int0", arg: 3, scope: !20, file: !3, line: 6, type: !8)
- !27 = !DILocalVariable(name: "int1", arg: 4, scope: !20, file: !3, line: 6, type: !8)
- !28 = !DILocalVariable(name: "int2", arg: 5, scope: !20, file: !3, line: 6, type: !8)
- !29 = !DILocalVariable(name: "int3", arg: 6, scope: !20, file: !3, line: 7, type: !8)
- !30 = !DILocalVariable(name: "int4", arg: 7, scope: !20, file: !3, line: 7, type: !8)
- !31 = !DILocalVariable(name: "inta", scope: !20, file: !3, line: 9, type: !8)
- !32 = !DILocalVariable(name: "intb", scope: !20, file: !3, line: 10, type: !8)
- !33 = !DILocalVariable(name: "intc", scope: !20, file: !3, line: 11, type: !8)
- !34 = !DILocalVariable(name: "intd", scope: !20, file: !3, line: 12, type: !8)
- !35 = !DILocalVariable(name: "inte", scope: !20, file: !3, line: 13, type: !8)
- !36 = !DILocalVariable(name: "intf", scope: !20, file: !3, line: 14, type: !8)
- !37 = !DILocalVariable(name: "intg", scope: !20, file: !3, line: 15, type: !8)
- !38 = !DIExpression()
- !39 = !DILocation(line: 6, column: 14, scope: !20)
- !40 = !DILocation(line: 6, column: 22, scope: !20)
- !41 = !DILocation(line: 6, column: 30, scope: !20)
- !42 = !DILocation(line: 6, column: 40, scope: !20)
- !43 = !DILocation(line: 6, column: 50, scope: !20)
- !44 = !DILocation(line: 7, column: 14, scope: !20)
- !45 = !DILocation(line: 7, column: 24, scope: !20)
- !46 = !DILocation(line: 9, column: 14, scope: !20)
- !47 = !{!48, !48, i64 0}
- !48 = !{!"int", !49, i64 0}
- !49 = !{!"omnipotent char", !50, i64 0}
- !50 = !{!"Simple C/C++ TBAA"}
- !51 = !DILocation(line: 9, column: 7, scope: !20)
- !52 = !DILocation(line: 10, column: 14, scope: !20)
- !53 = !DILocation(line: 10, column: 7, scope: !20)
- !54 = !DILocation(line: 11, column: 14, scope: !20)
- !55 = !DILocation(line: 11, column: 7, scope: !20)
- !56 = !DILocation(line: 12, column: 14, scope: !20)
- !57 = !DILocation(line: 12, column: 7, scope: !20)
- !58 = !DILocation(line: 13, column: 3, scope: !20)
- !59 = !DILocation(line: 13, column: 14, scope: !20)
- !60 = !DILocation(line: 13, column: 7, scope: !20)
- !61 = !DILocation(line: 14, column: 3, scope: !20)
- !62 = !DILocation(line: 14, column: 14, scope: !20)
- !63 = !DILocation(line: 14, column: 7, scope: !20)
- !64 = !DILocation(line: 15, column: 3, scope: !20)
- !65 = !DILocation(line: 17, column: 7, scope: !66)
- !66 = distinct !DILexicalBlock(scope: !20, file: !3, line: 17, column: 7)
- !67 = !DILocation(line: 17, column: 7, scope: !20)
- !68 = !DILocation(line: 20, column: 17, scope: !20)
- !69 = !DILocation(line: 20, column: 24, scope: !20)
- !70 = !DILocation(line: 20, column: 32, scope: !20)
- !71 = !DILocation(line: 20, column: 8, scope: !20)
- !72 = !DILocation(line: 21, column: 3, scope: !20)
- !73 = !DILocation(line: 22, column: 3, scope: !20)
- !74 = !DILocation(line: 24, column: 7, scope: !75)
- !75 = distinct !DILexicalBlock(scope: !20, file: !3, line: 24, column: 7)
- !76 = !DILocation(line: 24, column: 7, scope: !20)
- !77 = !DIExpression(DW_OP_deref)
- !78 = !DILocation(line: 15, column: 7, scope: !20)
- !79 = !DILocation(line: 25, column: 5, scope: !80)
- !80 = distinct !DILexicalBlock(scope: !75, file: !3, line: 24, column: 11)
- !81 = !DILocation(line: 27, column: 18, scope: !80)
- !82 = !DILocation(line: 27, column: 23, scope: !80)
- !83 = !DILocation(line: 27, column: 35, scope: !80)
- !84 = !DILocation(line: 27, column: 43, scope: !80)
- !85 = !DILocation(line: 28, column: 3, scope: !80)
- !86 = !DILocation(line: 29, column: 16, scope: !20)
- !87 = !DILocation(line: 29, column: 8, scope: !20)
- !88 = !DILocation(line: 30, column: 3, scope: !20)
- !89 = !DILocation(line: 31, column: 1, scope: !20)
- !90 = !DILocation(line: 31, column: 1, scope: !91)
- !91 = !DILexicalBlockFile(scope: !20, file: !3, discriminator: 2)
-
-...
----
-name: foo
-alignment: 4
-exposesReturnsTwice: false
-legalized: false
-regBankSelected: false
-selected: false
-tracksRegLiveness: true
-liveins:
- - { reg: '%edi' }
- - { reg: '%esi' }
- - { reg: '%edx' }
- - { reg: '%ecx' }
- - { reg: '%r8d' }
- - { reg: '%r9d' }
-calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx',
- '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15',
- '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d',
- '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ]
-frameInfo:
- isFrameAddressTaken: false
- isReturnAddressTaken: false
- hasStackMap: false
- hasPatchPoint: false
- stackSize: 72
- offsetAdjustment: -24
- maxAlignment: 8
- adjustsStack: true
- hasCalls: true
- maxCallFrameSize: 0
- hasOpaqueSPAdjustment: false
- hasVAStart: false
- hasMustTailInVarArgFunc: false
-fixedStack:
- - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, callee-saved-register: '%rbx' }
- - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, callee-saved-register: '%r12' }
- - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, callee-saved-register: '%r13' }
- - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, callee-saved-register: '%r14' }
- - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '%r15' }
- - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16 }
- - { id: 6, offset: 0, size: 4, alignment: 16, isImmutable: true, isAliased: false }
-stack:
- - { id: 0, name: inte, offset: -60, size: 4, alignment: 4 }
- - { id: 1, name: intf, offset: -76, size: 4, alignment: 4 }
- - { id: 2, name: intg, offset: -80, size: 4, alignment: 4 }
- - { id: 3, type: spill-slot, offset: -72, size: 4, alignment: 4 }
- - { id: 4, type: spill-slot, offset: -68, size: 4, alignment: 4 }
- - { id: 5, type: spill-slot, offset: -64, size: 4, alignment: 4 }
-body: |
- bb.0.entry:
- successors: %bb.1.if.end(0x30000000), %bb.5.cleanup(0x50000000)
- liveins: %ecx, %edi, %edx, %esi, %r8d, %r9d, %r15, %r14, %r13, %r12, %rbx, %rbp
-
- frame-setup PUSH64r killed %rbp, implicit-def %rsp, implicit %rsp
- CFI_INSTRUCTION def_cfa_offset 16
- CFI_INSTRUCTION offset %rbp, -16
- %rbp = frame-setup MOV64rr %rsp
- CFI_INSTRUCTION def_cfa_register %rbp
- frame-setup PUSH64r killed %r15, implicit-def %rsp, implicit %rsp
- frame-setup PUSH64r killed %r14, implicit-def %rsp, implicit %rsp
- frame-setup PUSH64r killed %r13, implicit-def %rsp, implicit %rsp
- frame-setup PUSH64r killed %r12, implicit-def %rsp, implicit %rsp
- frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp
- %rsp = frame-setup SUB64ri8 %rsp, 24, implicit-def dead %eflags
- CFI_INSTRUCTION offset %rbx, -56
- CFI_INSTRUCTION offset %r12, -48
- CFI_INSTRUCTION offset %r13, -40
- CFI_INSTRUCTION offset %r14, -32
- CFI_INSTRUCTION offset %r15, -24
- DBG_VALUE debug-use %edi, debug-use _, !24, !38, debug-location !39
- DBG_VALUE debug-use %esi, debug-use _, !25, !38, debug-location !40
- DBG_VALUE debug-use %edx, debug-use _, !26, !38, debug-location !41
- DBG_VALUE debug-use %ecx, debug-use _, !27, !38, debug-location !42
- DBG_VALUE debug-use %r8d, debug-use _, !28, !38, debug-location !43
- DBG_VALUE debug-use %r9d, debug-use _, !29, !38, debug-location !44
- %r14d = MOV32rr %r8d
- DBG_VALUE debug-use %r14d, debug-use _, !28, !38, debug-location !43
- %r12d = MOV32rr %esi
- DBG_VALUE debug-use %r12d, debug-use _, !25, !38, debug-location !40
- %eax = MOV32rr %edi
- DBG_VALUE debug-use %eax, debug-use _, !24, !38, debug-location !39
- %r13d = MOV32rm %rip, 1, _, @glob0, _, debug-location !46 :: (dereferenceable load 4 from @glob0, !tbaa !47)
- DBG_VALUE debug-use %r13d, debug-use _, !31, !38, debug-location !51
- %r8d = MOV32rm %rip, 1, _, @glob1, _, debug-location !52 :: (dereferenceable load 4 from @glob1, !tbaa !47)
- DBG_VALUE debug-use %r8d, debug-use _, !32, !38, debug-location !53
- %r15d = MOV32rm %rip, 1, _, @glob2, _, debug-location !54 :: (dereferenceable load 4 from @glob2, !tbaa !47)
- DBG_VALUE debug-use %r15d, debug-use _, !33, !38, debug-location !55
- %esi = MOV32rm %rip, 1, _, @glob3, _, debug-location !56 :: (dereferenceable load 4 from @glob3, !tbaa !47)
- DBG_VALUE debug-use %esi, debug-use _, !34, !38, debug-location !57
- %ebx = MOV32rm %rip, 1, _, @glob4, _, debug-location !59 :: (dereferenceable load 4 from @glob4, !tbaa !47)
- DBG_VALUE debug-use %ebx, debug-use _, !35, !38, debug-location !60
- MOV32mr %rbp, 1, _, -44, _, %ebx, debug-location !60 :: (store 4 into %ir.inte, !tbaa !47)
- %edi = MOV32rm %rip, 1, _, @glob5, _, debug-location !62 :: (dereferenceable load 4 from @glob5, !tbaa !47)
- DBG_VALUE debug-use %edi, debug-use _, !36, !38, debug-location !63
- MOV32mr %rbp, 1, _, -60, _, %edi, debug-location !63 :: (store 4 into %ir.intf, !tbaa !47)
- TEST32rr killed %eax, %eax, implicit-def %eflags, debug-location !67
- JNE_1 %bb.5.cleanup, implicit %eflags
-
- bb.1.if.end:
- successors: %bb.2(0x30000000), %bb.3.if.then4(0x50000000)
- liveins: %ebx, %ecx, %edi, %edx, %esi, %r8d, %r9d, %r12d, %r13d, %r14d, %r15d, %rbp
-
- MOV32mr %rbp, 1, _, -48, _, killed %edx :: (store 4 into %stack.5)
- MOV32mr %rbp, 1, _, -52, _, killed %r8d :: (store 4 into %stack.4)
- MOV32mr %rbp, 1, _, -56, _, killed %esi :: (store 4 into %stack.3)
- DBG_VALUE debug-use _, debug-use _, !30, !38, debug-location !45
- %r14d = ADD32rr killed %r14d, killed %ecx, implicit-def dead %eflags, debug-location !68
- %r14d = ADD32rr killed %r14d, killed %r9d, implicit-def dead %eflags, debug-location !69
- %r14d = IMUL32rm killed %r14d, %rbp, 1, _, 16, _, implicit-def dead %eflags, debug-location !70 :: (load 4 from %fixed-stack.6, align 16)
- DBG_VALUE debug-use %r14d, debug-use _, !26, !38, debug-location !41
- CALL64pcrel32 @use, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !72
- %edi = MOV32rr killed %ebx, debug-location !73
- CALL64pcrel32 @use, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !73
- TEST32rr killed %r12d, %r12d, implicit-def %eflags, debug-location !74
- JE_1 %bb.2, implicit %eflags
-
- bb.3.if.then4:
- successors: %bb.4.if.end13(0x80000000)
- liveins: %r14d, %r15d, %rbp
-
- %rdi = LEA64r %rbp, 1, _, -44, _
- DBG_VALUE %rbp, -44, !35, !38, debug-location !60
- %rsi = LEA64r %rbp, 1, _, -60, _
- DBG_VALUE %rbp, -60, !36, !38, debug-location !63
- %rdx = LEA64r %rbp, 1, _, -64, _
- DBG_VALUE %rbp, -64, !37, !38, debug-location !78
- CALL64pcrel32 @set, csr_64, implicit %rsp, implicit %rdi, implicit %rsi, implicit %rdx, implicit-def %rsp, debug-location !79
- %eax = MOV32rm %rbp, 1, _, -44, _, debug-location !81 :: (dereferenceable load 4 from %ir.inte, !tbaa !47)
- DBG_VALUE debug-use %eax, debug-use _, !35, !38, debug-location !60
- %r15d = ADD32rm killed %r15d, %rbp, 1, _, -52, _, implicit-def dead %eflags, debug-location !82 :: (load 4 from %stack.4)
- %r15d = IMUL32rr killed %r15d, %eax, implicit-def dead %eflags, debug-location !82
- %r15d = ADD32rm killed %r15d, %rbp, 1, _, -56, _, implicit-def dead %eflags, debug-location !83 :: (load 4 from %stack.3)
- %r15d = IMUL32rr killed %r15d, killed %eax, implicit-def dead %eflags, debug-location !84
- DBG_VALUE debug-use %r15d, debug-use _, !31, !38, debug-location !51
- %r13d = MOV32rr killed %r15d
- DBG_VALUE debug-use %r13d, debug-use _, !31, !38, debug-location !51
- JMP_1 %bb.4.if.end13
-
- bb.2:
- successors: %bb.4.if.end13(0x80000000)
- liveins: %r13d, %r14d, %rbp
-
- %r14d = ADD32rm killed %r14d, %rbp, 1, _, -48, _, implicit-def dead %eflags, debug-location !71 :: (load 4 from %stack.5)
- DBG_VALUE debug-use %r14d, debug-use _, !26, !38, debug-location !41
-
- bb.4.if.end13:
- successors: %bb.5.cleanup(0x80000000)
- liveins: %r13d, %r14d, %rbp
-
- DBG_VALUE debug-use %r14d, debug-use _, !26, !38, debug-location !41
- DBG_VALUE debug-use %r13d, debug-use _, !31, !38, debug-location !51
- %r13d = IMUL32rm killed %r13d, %rbp, 1, _, 16, _, implicit-def dead %eflags, debug-location !86 :: (load 4 from %fixed-stack.6, align 16)
- %r13d = ADD32rr killed %r13d, killed %r14d, implicit-def dead %eflags, debug-location !87
- DBG_VALUE debug-use %r13d, debug-use _, !26, !38, debug-location !41
- %edi = MOV32rr killed %r13d, debug-location !88
- CALL64pcrel32 @use, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !88
-
- bb.5.cleanup:
- liveins: %rbp
-
- %rsp = ADD64ri8 %rsp, 24, implicit-def dead %eflags, debug-location !90
- %rbx = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- %r12 = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- %r13 = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- %r14 = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- %r15 = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- %rbp = POP64r implicit-def %rsp, implicit %rsp, debug-location !90
- RETQ debug-location !90
-
-...
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