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JIT: Always track the context for late devirt #112396

Merged
merged 15 commits into from
Feb 19, 2025
Merged

JIT: Always track the context for late devirt #112396

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8563a18
Track InlinersContext in LateDevirtualizationInfo
hez2010 Feb 11, 2025
3678070
Rework fix
hez2010 Feb 11, 2025
1173d97
Update inline context for statement as well
hez2010 Feb 11, 2025
dc917f2
Use IL offset from call
hez2010 Feb 11, 2025
57427a4
Always set DebugInfo
hez2010 Feb 11, 2025
e0e7344
Track InlineContext
hez2010 Feb 11, 2025
4b30625
Cleanup
hez2010 Feb 11, 2025
d01f255
Always record late devirt info
hez2010 Feb 11, 2025
d746d95
Always record late devirt info
hez2010 Feb 12, 2025
6a2dcd6
Copy gtLateDevirtualizationInfo
hez2010 Feb 12, 2025
125600a
Refactor to take InlineContext explicitly
hez2010 Feb 12, 2025
1c711a3
Set inlinersContext to nullptr
hez2010 Feb 13, 2025
7f7c0f4
Late devirt info always available
hez2010 Feb 13, 2025
55585bd
Oops
hez2010 Feb 13, 2025
4fa6b92
Remove the reduandant flag
hez2010 Feb 15, 2025
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13 changes: 8 additions & 5 deletions src/coreclr/jit/fginline.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -590,14 +590,16 @@ class SubstitutePlaceholdersAndDevirtualizeWalker : public GenTreeVisitor<Substi
#endif // DEBUG

CORINFO_CONTEXT_HANDLE context = nullptr;
InlineContext* inlinersContext = m_compiler->compInlineContext;
CORINFO_METHOD_HANDLE method = call->gtCallMethHnd;
unsigned methodFlags = 0;
const bool isLateDevirtualization = true;
const bool explicitTailCall = call->IsTailPrefixedCall();

if ((call->gtCallMoreFlags & GTF_CALL_M_HAS_LATE_DEVIRT_INFO) != 0)
{
context = call->gtLateDevirtualizationInfo->exactContextHnd;
context = call->gtLateDevirtualizationInfo->exactContextHnd;
inlinersContext = call->gtLateDevirtualizationInfo->inlinersContext;
// Note: we might call this multiple times for the same trees.
// If the devirtualization below succeeds, the call becomes
// non-virtual and we won't get here again. If it does not
Expand All @@ -613,9 +615,11 @@ class SubstitutePlaceholdersAndDevirtualizeWalker : public GenTreeVisitor<Substi
if (!call->IsVirtual())
{
assert(context != nullptr);
CORINFO_CALL_INFO callInfo = {};
callInfo.hMethod = method;
callInfo.methodFlags = methodFlags;
assert(inlinersContext != nullptr);
m_compiler->compInlineContext = inlinersContext;
CORINFO_CALL_INFO callInfo = {};
callInfo.hMethod = method;
callInfo.methodFlags = methodFlags;
m_compiler->impMarkInlineCandidate(call, context, false, &callInfo);

if (call->IsInlineCandidate())
Expand Down Expand Up @@ -653,7 +657,6 @@ class SubstitutePlaceholdersAndDevirtualizeWalker : public GenTreeVisitor<Substi
}

call->GetSingleInlineCandidateInfo()->exactContextHandle = context;
INDEBUG(call->GetSingleInlineCandidateInfo()->inlinersContext = call->gtInlineContext);

JITDUMP("New inline candidate due to late devirtualization:\n");
DISPTREE(call);
Expand Down
1 change: 1 addition & 0 deletions src/coreclr/jit/importercalls.cpp
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Expand Up @@ -1444,6 +1444,7 @@ var_types Compiler::impImportCall(OPCODE opcode,
origCall->gtCallMoreFlags |= GTF_CALL_M_HAS_LATE_DEVIRT_INFO;
LateDevirtualizationInfo* const info = new (this, CMK_Inlining) LateDevirtualizationInfo;
info->exactContextHnd = exactContextHnd;
info->inlinersContext = compInlineContext;
origCall->gtLateDevirtualizationInfo = info;
}

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1 change: 1 addition & 0 deletions src/coreclr/jit/inline.h
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Expand Up @@ -634,6 +634,7 @@ struct InlineCandidateInfo : public HandleHistogramProfileCandidateInfo
struct LateDevirtualizationInfo
{
CORINFO_CONTEXT_HANDLE exactContextHnd;
InlineContext* inlinersContext;
};

// InlArgInfo describes inline candidate argument properties.
Expand Down
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