[llvm] r374068 - [DebugInfo][If-Converter] Update call site info during the optimization
Nikola Prica via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 8 08:43:12 PDT 2019
Author: nikolaprica
Date: Tue Oct 8 08:43:12 2019
New Revision: 374068
URL: http://llvm.org/viewvc/llvm-project?rev=374068&view=rev
Log:
[DebugInfo][If-Converter] Update call site info during the optimization
During the If-Converter optimization pay attention when copying or
deleting call instructions in order to keep call site information in
valid state.
Reviewers: aprantl, vsk, efriedma
Reviewed By: vsk, efriedma
Differential Revision: https://reviews.llvm.org/D66955
Added:
llvm/trunk/test/DebugInfo/MIR/ARM/if-coverter-call-site-info.mir
Modified:
llvm/trunk/include/llvm/CodeGen/MachineFunction.h
llvm/trunk/lib/CodeGen/BranchFolding.cpp
llvm/trunk/lib/CodeGen/IfConversion.cpp
llvm/trunk/lib/CodeGen/InlineSpiller.cpp
llvm/trunk/lib/CodeGen/LiveRangeEdit.cpp
llvm/trunk/lib/CodeGen/MachineFunction.cpp
llvm/trunk/lib/CodeGen/MachineOutliner.cpp
llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp
llvm/trunk/lib/CodeGen/TargetInstrInfo.cpp
llvm/trunk/lib/CodeGen/UnreachableBlockElim.cpp
llvm/trunk/lib/CodeGen/XRayInstrumentation.cpp
llvm/trunk/lib/Target/ARM/ARMExpandPseudoInsts.cpp
llvm/trunk/lib/Target/X86/X86ExpandPseudo.cpp
llvm/trunk/test/CodeGen/ARM/smml.ll
Modified: llvm/trunk/include/llvm/CodeGen/MachineFunction.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/MachineFunction.h?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/MachineFunction.h (original)
+++ llvm/trunk/include/llvm/CodeGen/MachineFunction.h Tue Oct 8 08:43:12 2019
@@ -36,6 +36,7 @@
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Recycler.h"
+#include "llvm/Target/TargetMachine.h"
#include <cassert>
#include <cstdint>
#include <memory>
@@ -400,6 +401,17 @@ private:
/// Map a call instruction to call site arguments forwarding info.
CallSiteInfoMap CallSitesInfo;
+ /// A helper function that returns call site info for a give call
+ /// instruction if debug entry value support is enabled.
+ CallSiteInfoMap::iterator getCallSiteInfo(const MachineInstr *MI) {
+ assert(MI->isCall() &&
+ "Call site info refers only to call instructions!");
+
+ if (!Target.Options.EnableDebugEntryValues)
+ return CallSitesInfo.end();
+ return CallSitesInfo.find(MI);
+ }
+
// Callbacks for insertion and removal.
void handleInsertion(MachineInstr &MI);
void handleRemoval(MachineInstr &MI);
@@ -977,12 +989,24 @@ public:
return CallSitesInfo;
}
- /// Update call sites info by deleting entry for \p Old call instruction.
- /// If \p New is present then transfer \p Old call info to it. This function
- /// should be called before removing call instruction or before replacing
- /// call instruction with new one.
- void updateCallSiteInfo(const MachineInstr *Old,
- const MachineInstr *New = nullptr);
+ /// Following functions update call site info. They should be called before
+ /// removing, replacing or copying call instruction.
+
+ /// Move the call site info from \p Old to \New call site info. This function
+ /// is used when we are replacing one call instruction with another one to
+ /// the same callee.
+ void moveCallSiteInfo(const MachineInstr *Old,
+ const MachineInstr *New);
+
+ /// Erase the call site info for \p MI. It is used to remove a call
+ /// instruction from the instruction stream.
+ void eraseCallSiteInfo(const MachineInstr *MI);
+
+ /// Copy the call site info from \p Old to \ New. Its usage is when we are
+ /// making a copy of the instruction that will be inserted at different point
+ /// of the instruction stream.
+ void copyCallSiteInfo(const MachineInstr *Old,
+ const MachineInstr *New);
};
//===--------------------------------------------------------------------===//
Modified: llvm/trunk/lib/CodeGen/BranchFolding.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/BranchFolding.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/BranchFolding.cpp (original)
+++ llvm/trunk/lib/CodeGen/BranchFolding.cpp Tue Oct 8 08:43:12 2019
@@ -162,6 +162,11 @@ void BranchFolder::RemoveDeadBlock(Machi
// Avoid matching if this pointer gets reused.
TriedMerging.erase(MBB);
+ // Update call site info.
+ std::for_each(MBB->begin(), MBB->end(), [MF](const MachineInstr &MI) {
+ if (MI.isCall(MachineInstr::IgnoreBundle))
+ MF->eraseCallSiteInfo(&MI);
+ });
// Remove the block.
MF->erase(MBB);
EHScopeMembership.erase(MBB);
Modified: llvm/trunk/lib/CodeGen/IfConversion.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/IfConversion.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/IfConversion.cpp (original)
+++ llvm/trunk/lib/CodeGen/IfConversion.cpp Tue Oct 8 08:43:12 2019
@@ -1743,6 +1743,11 @@ bool IfConverter::IfConvertDiamondCommon
++i;
}
while (NumDups1 != 0) {
+ // Since this instruction is going to be deleted, update call
+ // site info state if the instruction is call instruction.
+ if (DI2->isCall(MachineInstr::IgnoreBundle))
+ MBB2.getParent()->eraseCallSiteInfo(&*DI2);
+
++DI2;
if (DI2 == MBB2.end())
break;
@@ -1784,7 +1789,14 @@ bool IfConverter::IfConvertDiamondCommon
// NumDups2 only counted non-dbg_value instructions, so this won't
// run off the head of the list.
assert(DI1 != MBB1.begin());
+
--DI1;
+
+ // Since this instruction is going to be deleted, update call
+ // site info state if the instruction is call instruction.
+ if (DI1->isCall(MachineInstr::IgnoreBundle))
+ MBB1.getParent()->eraseCallSiteInfo(&*DI1);
+
// skip dbg_value instructions
if (!DI1->isDebugInstr())
++i;
@@ -2069,6 +2081,10 @@ void IfConverter::CopyAndPredicateBlock(
break;
MachineInstr *MI = MF.CloneMachineInstr(&I);
+ // Make a copy of the call site info.
+ if (MI->isCall(MachineInstr::IgnoreBundle))
+ MF.copyCallSiteInfo(&I,MI);
+
ToBBI.BB->insert(ToBBI.BB->end(), MI);
ToBBI.NonPredSize++;
unsigned ExtraPredCost = TII->getPredicationCost(I);
Modified: llvm/trunk/lib/CodeGen/InlineSpiller.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/InlineSpiller.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/InlineSpiller.cpp (original)
+++ llvm/trunk/lib/CodeGen/InlineSpiller.cpp Tue Oct 8 08:43:12 2019
@@ -867,7 +867,7 @@ foldMemoryOperand(ArrayRef<std::pair<Mac
--NumSpills;
LIS.ReplaceMachineInstrInMaps(*MI, *FoldMI);
if (MI->isCall())
- MI->getMF()->updateCallSiteInfo(MI, FoldMI);
+ MI->getMF()->moveCallSiteInfo(MI, FoldMI);
MI->eraseFromParent();
// Insert any new instructions other than FoldMI into the LIS maps.
Modified: llvm/trunk/lib/CodeGen/LiveRangeEdit.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveRangeEdit.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveRangeEdit.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveRangeEdit.cpp Tue Oct 8 08:43:12 2019
@@ -232,7 +232,7 @@ bool LiveRangeEdit::foldAsLoad(LiveInter
LLVM_DEBUG(dbgs() << " folded: " << *FoldMI);
LIS.ReplaceMachineInstrInMaps(*UseMI, *FoldMI);
if (UseMI->isCall())
- UseMI->getMF()->updateCallSiteInfo(UseMI, FoldMI);
+ UseMI->getMF()->moveCallSiteInfo(UseMI, FoldMI);
UseMI->eraseFromParent();
DefMI->addRegisterDead(LI->reg, nullptr);
Dead.push_back(DefMI);
Modified: llvm/trunk/lib/CodeGen/MachineFunction.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineFunction.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineFunction.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineFunction.cpp Tue Oct 8 08:43:12 2019
@@ -835,20 +835,36 @@ void MachineFunction::addCodeViewHeapAll
CodeViewHeapAllocSites.push_back(std::make_tuple(BeginLabel, EndLabel, DI));
}
-void MachineFunction::updateCallSiteInfo(const MachineInstr *Old,
- const MachineInstr *New) {
- if (!Target.Options.EnableDebugEntryValues || Old == New)
- return;
+void MachineFunction::moveCallSiteInfo(const MachineInstr *Old,
+ const MachineInstr *New) {
+ assert(New->isCall() && "Call site info refers only to call instructions!");
- assert(Old->isCall() && (!New || New->isCall()) &&
- "Call site info referes only to call instructions!");
- CallSiteInfoMap::iterator CSIt = CallSitesInfo.find(Old);
+ CallSiteInfoMap::iterator CSIt = getCallSiteInfo(Old);
if (CSIt == CallSitesInfo.end())
return;
+
CallSiteInfo CSInfo = std::move(CSIt->second);
CallSitesInfo.erase(CSIt);
- if (New)
- CallSitesInfo[New] = CSInfo;
+ CallSitesInfo[New] = CSInfo;
+}
+
+void MachineFunction::eraseCallSiteInfo(const MachineInstr *MI) {
+ CallSiteInfoMap::iterator CSIt = getCallSiteInfo(MI);
+ if (CSIt == CallSitesInfo.end())
+ return;
+ CallSitesInfo.erase(CSIt);
+}
+
+void MachineFunction::copyCallSiteInfo(const MachineInstr *Old,
+ const MachineInstr *New) {
+ assert(New->isCall() && "Call site info refers only to call instructions!");
+
+ CallSiteInfoMap::iterator CSIt = getCallSiteInfo(Old);
+ if (CSIt == CallSitesInfo.end())
+ return;
+
+ CallSiteInfo CSInfo = CSIt->second;
+ CallSitesInfo[New] = CSInfo;
}
/// \}
Modified: llvm/trunk/lib/CodeGen/MachineOutliner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineOutliner.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineOutliner.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineOutliner.cpp Tue Oct 8 08:43:12 2019
@@ -1260,7 +1260,7 @@ bool MachineOutliner::outline(Module &M,
true /* isImp = true */));
}
if (MI.isCall())
- MI.getMF()->updateCallSiteInfo(&MI);
+ MI.getMF()->eraseCallSiteInfo(&MI);
};
// Copy over the defs in the outlined range.
// First inst in outlined range <-- Anything that's defined in this
Modified: llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp (original)
+++ llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp Tue Oct 8 08:43:12 2019
@@ -1776,7 +1776,7 @@ bool PeepholeOptimizer::runOnMachineFunc
LocalMIs.erase(DefMI);
LocalMIs.insert(FoldMI);
if (MI->isCall())
- MI->getMF()->updateCallSiteInfo(MI, FoldMI);
+ MI->getMF()->moveCallSiteInfo(MI, FoldMI);
MI->eraseFromParent();
DefMI->eraseFromParent();
MRI->markUsesInDebugValueAsUndef(FoldedReg);
Modified: llvm/trunk/lib/CodeGen/TargetInstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TargetInstrInfo.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TargetInstrInfo.cpp (original)
+++ llvm/trunk/lib/CodeGen/TargetInstrInfo.cpp Tue Oct 8 08:43:12 2019
@@ -143,7 +143,7 @@ TargetInstrInfo::ReplaceTailWithBranchTo
while (Tail != MBB->end()) {
auto MI = Tail++;
if (MI->isCall())
- MBB->getParent()->updateCallSiteInfo(&*MI);
+ MBB->getParent()->eraseCallSiteInfo(&*MI);
MBB->erase(MI);
}
Modified: llvm/trunk/lib/CodeGen/UnreachableBlockElim.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/UnreachableBlockElim.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/UnreachableBlockElim.cpp (original)
+++ llvm/trunk/lib/CodeGen/UnreachableBlockElim.cpp Tue Oct 8 08:43:12 2019
@@ -151,7 +151,7 @@ bool UnreachableMachineBlockElim::runOnM
// Remove any call site information for calls in the block.
for (auto &I : DeadBlocks[i]->instrs())
if (I.isCall(MachineInstr::IgnoreBundle))
- DeadBlocks[i]->getParent()->updateCallSiteInfo(&I);
+ DeadBlocks[i]->getParent()->eraseCallSiteInfo(&I);
DeadBlocks[i]->eraseFromParent();
}
Modified: llvm/trunk/lib/CodeGen/XRayInstrumentation.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/XRayInstrumentation.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/XRayInstrumentation.cpp (original)
+++ llvm/trunk/lib/CodeGen/XRayInstrumentation.cpp Tue Oct 8 08:43:12 2019
@@ -111,7 +111,7 @@ void XRayInstrumentation::replaceRetWith
MIB.add(MO);
Terminators.push_back(&T);
if (T.isCall())
- MF.updateCallSiteInfo(&T);
+ MF.eraseCallSiteInfo(&T);
}
}
}
Modified: llvm/trunk/lib/Target/ARM/ARMExpandPseudoInsts.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMExpandPseudoInsts.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMExpandPseudoInsts.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMExpandPseudoInsts.cpp Tue Oct 8 08:43:12 2019
@@ -1207,7 +1207,7 @@ bool ARMExpandPseudo::ExpandMI(MachineBa
// Update call site info and delete the pseudo instruction TCRETURN.
- MBB.getParent()->updateCallSiteInfo(&MI, &*NewMI);
+ MBB.getParent()->moveCallSiteInfo(&MI, &*NewMI);
MBB.erase(MBBI);
MBBI = NewMI;
@@ -1439,7 +1439,7 @@ bool ARMExpandPseudo::ExpandMI(MachineBa
MIB.cloneMemRefs(MI);
TransferImpOps(MI, MIB, MIB);
- MI.getMF()->updateCallSiteInfo(&MI, &*MIB);
+ MI.getMF()->moveCallSiteInfo(&MI, &*MIB);
MI.eraseFromParent();
return true;
}
Modified: llvm/trunk/lib/Target/X86/X86ExpandPseudo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ExpandPseudo.cpp?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ExpandPseudo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ExpandPseudo.cpp Tue Oct 8 08:43:12 2019
@@ -275,7 +275,7 @@ bool X86ExpandPseudo::ExpandMI(MachineBa
MachineInstr &NewMI = *std::prev(MBBI);
NewMI.copyImplicitOps(*MBBI->getParent()->getParent(), *MBBI);
- MBB.getParent()->updateCallSiteInfo(&*MBBI, &NewMI);
+ MBB.getParent()->moveCallSiteInfo(&*MBBI, &NewMI);
// Delete the pseudo instruction TCRETURN.
MBB.erase(MBBI);
Modified: llvm/trunk/test/CodeGen/ARM/smml.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/smml.ll?rev=374068&r1=374067&r2=374068&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/smml.ll (original)
+++ llvm/trunk/test/CodeGen/ARM/smml.ll Tue Oct 8 08:43:12 2019
@@ -8,6 +8,13 @@
; RUN: llc -mtriple=thumbv7m-eabi %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-V4
; RUN: llc -mtriple=thumbv7em-eabi %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-THUMBV6T2
+; Next test would previously trigger an assertion responsible for verification of
+; call site info state.
+; RUN: llc -stop-after=if-converter -debug-entry-values -mtriple=thumbv6t2-eabi %s -o -| FileCheck %s -check-prefix=CHECK-CALLSITE
+; CHECK-CALLSITE: name: test_used_flags
+; CHECK-CALLSITE: callSites:
+
+
define i32 @Test0(i32 %a, i32 %b, i32 %c) nounwind readnone ssp {
entry:
; CHECK-LABEL: Test0
Added: llvm/trunk/test/DebugInfo/MIR/ARM/if-coverter-call-site-info.mir
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/MIR/ARM/if-coverter-call-site-info.mir?rev=374068&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/MIR/ARM/if-coverter-call-site-info.mir (added)
+++ llvm/trunk/test/DebugInfo/MIR/ARM/if-coverter-call-site-info.mir Tue Oct 8 08:43:12 2019
@@ -0,0 +1,165 @@
+# RUN: llc -mtriple=arm-linux-gnu -debug-entry-values -run-pass if-converter %s -o -| FileCheck %s
+
+# Vefify that the call site info will be updated after the optimization.
+# This test case would previously trigger an assertion when
+# deleting the call instruction.
+
+# Test case is generated from:
+# extern void
+# foo (int* seg, int subseg);
+# extern int* mri_common_symbol;
+#
+# void
+# baa (int* secptr, int subseg)
+# {
+# if (! (secptr == 0 && subseg == 0))
+# foo (secptr, subseg);
+# mri_common_symbol = 0;
+# }
+#
+# With slight change of MIR - substitution of BL instruction with BL_pred
+# in order to trigger optimization.
+# clang -target arm-linux-gnu -g -O2 -Xclang -femit-debug-entry-values
+# %s -stop-before=if-convert
+#
+# CHECK: callSites:
+# CHECK-NEXT: - { bb: {{.*}}, offset: {{.*}}, fwdArgRegs:
+# CHECK-NEXT: - { arg: 0, reg: '$r0' }
+# CHECK-NEXT: - { arg: 1, reg: '$r1' } }
+
+--- |
+ ; ModuleID = 'if-convert-call-site-info.c'
+ source_filename = "if-convert-call-site-info.c"
+ target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
+ target triple = "armv6kz-unknown-linux-gnueabihf"
+
+ @mri_common_symbol = external dso_local local_unnamed_addr global i32*, align 4
+
+ ; Function Attrs: nounwind
+ define dso_local void @baa(i32* %secptr, i32 %subseg) local_unnamed_addr #0 !dbg !14 {
+ entry:
+ call void @llvm.dbg.value(metadata i32* %secptr, metadata !16, metadata !DIExpression()), !dbg !18
+ call void @llvm.dbg.value(metadata i32 %subseg, metadata !17, metadata !DIExpression()), !dbg !18
+ %cmp = icmp eq i32* %secptr, null, !dbg !19
+ %cmp1 = icmp eq i32 %subseg, 0, !dbg !21
+ %or.cond = and i1 %cmp, %cmp1, !dbg !22
+ br i1 %or.cond, label %if.end, label %if.then, !dbg !22
+
+ if.then: ; preds = %entry
+ tail call void @foo(i32* %secptr, i32 %subseg), !dbg !23
+ br label %if.end, !dbg !23
+
+ if.end: ; preds = %entry, %if.then
+ store i32* null, i32** @mri_common_symbol, align 4, !dbg !24, !tbaa !25
+ ret void, !dbg !29
+ }
+
+ declare !dbg !4 dso_local void @foo(i32*, i32) local_unnamed_addr
+
+ ; Function Attrs: nounwind readnone speculatable willreturn
+ declare void @llvm.dbg.value(metadata, metadata, metadata)
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**)
+
+ attributes #0 = { "frame-pointer"="all" }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!9, !10, !11, !12}
+ !llvm.ident = !{!13}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+ !1 = !DIFile(filename: "if-convert-call-site-info.c", directory: "/")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 10, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
+ !5 = !DISubroutineType(types: !6)
+ !6 = !{null, !7, !8}
+ !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 32)
+ !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+ !9 = !{i32 2, !"Dwarf Version", i32 4}
+ !10 = !{i32 2, !"Debug Info Version", i32 3}
+ !11 = !{i32 1, !"wchar_size", i32 4}
+ !12 = !{i32 1, !"min_enum_size", i32 4}
+ !13 = !{!"clang version 10.0.0 "}
+ !14 = distinct !DISubprogram(name: "baa", scope: !1, file: !1, line: 14, type: !5, scopeLine: 15, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
+ !15 = !{!16, !17}
+ !16 = !DILocalVariable(name: "secptr", arg: 1, scope: !14, file: !1, line: 14, type: !7, flags: DIFlagArgumentNotModified)
+ !17 = !DILocalVariable(name: "subseg", arg: 2, scope: !14, file: !1, line: 14, type: !8, flags: DIFlagArgumentNotModified)
+ !18 = !DILocation(line: 0, scope: !14)
+ !19 = !DILocation(line: 16, column: 17, scope: !20)
+ !20 = distinct !DILexicalBlock(scope: !14, file: !1, line: 16, column: 7)
+ !21 = !DILocation(line: 16, column: 32, scope: !20)
+ !22 = !DILocation(line: 16, column: 22, scope: !20)
+ !23 = !DILocation(line: 17, column: 5, scope: !20)
+ !24 = !DILocation(line: 18, column: 21, scope: !14)
+ !25 = !{!26, !26, i64 0}
+ !26 = !{!"any pointer", !27, i64 0}
+ !27 = !{!"omnipotent char", !28, i64 0}
+ !28 = !{!"Simple C/C++ TBAA"}
+ !29 = !DILocation(line: 19, column: 1, scope: !14)
+
+...
+---
+name: baa
+alignment: 2
+tracksRegLiveness: true
+liveins:
+ - { reg: '$r0' }
+ - { reg: '$r1' }
+frameInfo:
+ stackSize: 8
+ maxAlignment: 4
+ adjustsStack: true
+ hasCalls: true
+ maxCallFrameSize: 0
+stack:
+ - { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr',
+ callee-saved-restored: false }
+ - { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r11' }
+callSites:
+ - { bb: 2, offset: 0, fwdArgRegs:
+ - { arg: 0, reg: '$r0' }
+ - { arg: 1, reg: '$r1' } }
+constants:
+ - id: 0
+ value: 'i32** null'
+ alignment: 4
+machineFunctionInfo: {}
+body: |
+ bb.0.entry:
+ successors: %bb.1(0x60000000), %bb.2(0x20000000)
+ liveins: $r0, $r1, $lr
+
+ DBG_VALUE $r0, $noreg, !16, !DIExpression(), debug-location !18
+ DBG_VALUE $r0, $noreg, !16, !DIExpression(), debug-location !18
+ DBG_VALUE $r1, $noreg, !17, !DIExpression(), debug-location !18
+ DBG_VALUE $r1, $noreg, !17, !DIExpression(), debug-location !18
+ $sp = frame-setup STMDB_UPD $sp, 14, $noreg, killed $r11, killed $lr
+ frame-setup CFI_INSTRUCTION def_cfa_offset 8
+ frame-setup CFI_INSTRUCTION offset $lr, -4
+ frame-setup CFI_INSTRUCTION offset $r11, -8
+ $r11 = frame-setup MOVr killed $sp, 14, $noreg, $noreg
+ frame-setup CFI_INSTRUCTION def_cfa_register $r11
+ CMPri renamable $r0, 0, 14, $noreg, implicit-def $cpsr, debug-location !22
+ Bcc %bb.2, 1, killed $cpsr, debug-location !22
+
+ bb.1.entry:
+ successors: %bb.3(0x55555555), %bb.2(0x2aaaaaab)
+ liveins: $r0, $r1
+
+ CMPri renamable $r1, 0, 14, $noreg, implicit-def $cpsr, debug-location !22
+ Bcc %bb.3, 0, killed $cpsr, debug-location !22
+
+ bb.2.if.then:
+ liveins: $r0, $r1
+
+ BL_pred @foo, 14, $noreg, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit $r1, implicit-def $sp, debug-location !23
+
+ bb.3.if.end:
+ renamable $r0 = LDRi12 %const.0, 0, 14, $noreg, debug-location !24 :: (load 4 from constant-pool)
+ renamable $r1 = MOVi 0, 14, $noreg, $noreg
+ STRi12 killed renamable $r1, killed renamable $r0, 0, 14, $noreg, debug-location !24 :: (store 4 into @mri_common_symbol, !tbaa !25)
+ $sp = LDMIA_RET $sp, 14, $noreg, def $r11, def $pc, debug-location !29
+
+...
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