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Merged
kunalspathak merged 7 commits into from
Aug 18, 2022
Merged

Skip assertion list look ups where unnecessary #73142

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1351ebb
Add bunch of shortcircuit checks
kunalspathak Jul 28, 2022
432d315
shortcircuit varTypeIsStruct()
kunalspathak Jul 29, 2022
9c33450
optCanPropBndsChk
kunalspathak Jul 30, 2022
16f9f8f
Add some shortcircuit code
kunalspathak Jul 30, 2022
337ee1d
jit format
kunalspathak Jul 30, 2022
324e4d8
Fix a bug
kunalspathak Jul 30, 2022
9b44443
Added helper methods to have consistent checks
kunalspathak Aug 1, 2022
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48 changes: 33 additions & 15 deletions src/coreclr/jit/assertionprop.cpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -979,6 +979,11 @@ void Compiler::optAssertionInit(bool isLocalProp)
optAssertionCount = 0;
optAssertionPropagated = false;
bbJtrueAssertionOut = nullptr;
optCanPropLclVar = false;
optCanPropEqual = false;
optCanPropNonNull = false;
optCanPropBndsChk = false;
optCanPropSubRange = false;
}

#ifdef DEBUG
Expand DownExpand Up@@ -1996,6 +2001,13 @@ AssertionIndex Compiler::optAddAssertion(AssertionDsc* newAssertion)
}
#endif // DEBUG

// Track the shortcircuit criterias
optCanPropLclVar |= newAssertion->CanPropLclVar();
optCanPropEqual |= newAssertion->CanPropEqualOrNotEqual();
optCanPropNonNull |= newAssertion->CanPropNonNull();
optCanPropSubRange |= newAssertion->CanPropSubRange();
optCanPropBndsChk |= newAssertion->CanPropBndsCheck();

// Assertion mask bits are [index + 1].
if (optLocalAssertionProp)
{
Expand DownExpand Up@@ -2826,7 +2838,7 @@ AssertionIndex Compiler::optFindComplementary(AssertionIndex assertIndex)
//
AssertionIndex Compiler::optAssertionIsSubrange(GenTree* tree, IntegralRange range, ASSERT_VALARG_TP assertions)
{
if (!optLocalAssertionProp && BitVecOps::IsEmpty(apTraits, assertions))
if ((!optLocalAssertionProp && BitVecOps::IsEmpty(apTraits, assertions)) || !optCanPropSubRange)
{
return NO_ASSERTION_INDEX;
}
Expand All@@ -2836,8 +2848,7 @@ AssertionIndex Compiler::optAssertionIsSubrange(GenTree* tree, IntegralRange ran
AssertionDsc* curAssertion = optGetAssertion(index);
if ((optLocalAssertionProp ||
BitVecOps::IsMember(apTraits, assertions, index - 1)) && // either local prop or use propagated assertions
(curAssertion->assertionKind == OAK_SUBRANGE) &&
(curAssertion->op1.kind == O1K_LCLVAR))
curAssertion->CanPropSubRange())
{
// For local assertion prop use comparison on locals, and use comparison on vns for global prop.
bool isEqual = optLocalAssertionProp
Expand DownExpand Up@@ -3597,6 +3608,13 @@ GenTree* Compiler::optAssertionProp_LclVar(ASSERT_VALARG_TP assertions, GenTreeL
return nullptr;
}

// There are no constant assertions for structs in global propagation.
//
if ((!optLocalAssertionProp && varTypeIsStruct(tree)) || !optCanPropLclVar)
{
return nullptr;
}

BitVecOps::Iter iter(apTraits, assertions);
unsigned index = 0;
while (iter.NextElem(&index))
Expand All@@ -3608,7 +3626,7 @@ GenTree* Compiler::optAssertionProp_LclVar(ASSERT_VALARG_TP assertions, GenTreeL
}
// See if the variable is equal to a constant or another variable.
AssertionDsc* curAssertion = optGetAssertion(assertionIndex);
if (curAssertion->assertionKind != OAK_EQUAL || curAssertion->op1.kind != O1K_LCLVAR)
if (!curAssertion->CanPropLclVar())
{
continue;
}
Expand DownExpand Up@@ -3795,7 +3813,7 @@ AssertionIndex Compiler::optLocalAssertionIsEqualOrNotEqual(
//
AssertionIndex Compiler::optGlobalAssertionIsEqualOrNotEqual(ASSERT_VALARG_TP assertions, GenTree* op1, GenTree* op2)
{
if (BitVecOps::IsEmpty(apTraits, assertions))
if (BitVecOps::IsEmpty(apTraits, assertions) || !optCanPropEqual)
{
return NO_ASSERTION_INDEX;
}
Expand All@@ -3809,7 +3827,7 @@ AssertionIndex Compiler::optGlobalAssertionIsEqualOrNotEqual(ASSERT_VALARG_TP as
break;
}
AssertionDsc* curAssertion = optGetAssertion(assertionIndex);
if ((curAssertion->assertionKind != OAK_EQUAL && curAssertion->assertionKind != OAK_NOT_EQUAL))
if (!curAssertion->CanPropEqualOrNotEqual())
{
continue;
}
Expand DownExpand Up@@ -3848,7 +3866,7 @@ AssertionIndex Compiler::optGlobalAssertionIsEqualOrNotEqual(ASSERT_VALARG_TP as
*/
AssertionIndex Compiler::optGlobalAssertionIsEqualOrNotEqualZero(ASSERT_VALARG_TP assertions, GenTree* op1)
{
if (BitVecOps::IsEmpty(apTraits, assertions))
if (BitVecOps::IsEmpty(apTraits, assertions) || !optCanPropEqual)
{
return NO_ASSERTION_INDEX;
}
Expand All@@ -3862,7 +3880,7 @@ AssertionIndex Compiler::optGlobalAssertionIsEqualOrNotEqualZero(ASSERT_VALARG_T
break;
}
AssertionDsc* curAssertion = optGetAssertion(assertionIndex);
if ((curAssertion->assertionKind != OAK_EQUAL && curAssertion->assertionKind != OAK_NOT_EQUAL))
if (!curAssertion->CanPropEqualOrNotEqual())
{
continue;
}
Expand DownExpand Up@@ -4487,6 +4505,11 @@ AssertionIndex Compiler::optAssertionIsNonNullInternal(GenTree* op,
*pVnBased = false;
#endif

if (!optCanPropNonNull)
{
return NO_ASSERTION_INDEX;
}

// If local assertion prop use lcl comparison, else use VN comparison.
if (!optLocalAssertionProp)
{
Expand DownExpand Up@@ -4531,12 +4554,7 @@ AssertionIndex Compiler::optAssertionIsNonNullInternal(GenTree* op,
break;
}
AssertionDsc* curAssertion = optGetAssertion(assertionIndex);
if (curAssertion->assertionKind != OAK_NOT_EQUAL)
{
continue;
}

if (curAssertion->op2.vn != ValueNumStore::VNForNull())
if (!curAssertion->CanPropNonNull())
{
continue;
}
Expand DownExpand Up@@ -4681,7 +4699,7 @@ GenTree* Compiler::optAssertionProp_Call(ASSERT_VALARG_TP assertions, GenTreeCal
*/
GenTree* Compiler::optAssertionProp_BndsChk(ASSERT_VALARG_TP assertions, GenTree* tree, Statement* stmt)
{
if (optLocalAssertionProp)
if (optLocalAssertionProp || !optCanPropBndsChk)
{
return nullptr;
}
Expand Down
30 changes: 30 additions & 0 deletions src/coreclr/jit/compiler.h
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Original file line numberDiff line numberDiff line change
Expand Up@@ -7110,6 +7110,31 @@ class Compiler
return ((assertionKind == OAK_EQUAL) || (assertionKind == OAK_NOT_EQUAL)) && (op2.kind == O2K_CONST_INT);
}

bool CanPropLclVar()
{
return assertionKind == OAK_EQUAL && op1.kind == O1K_LCLVAR;
}

bool CanPropEqualOrNotEqual()
{
return assertionKind == OAK_EQUAL || assertionKind == OAK_NOT_EQUAL;
}

bool CanPropNonNull()
{
return assertionKind == OAK_NOT_EQUAL && op2.vn == ValueNumStore::VNForNull();
}

bool CanPropBndsCheck()
{
return op1.kind == O1K_ARR_BND;
}

bool CanPropSubRange()
{
return assertionKind == OAK_SUBRANGE && op1.kind == O1K_LCLVAR;
}

static bool SameKind(AssertionDsc* a1, AssertionDsc* a2)
{
return a1->assertionKind == a2->assertionKind && a1->op1.kind == a2->op1.kind &&
Expand DownExpand Up@@ -7231,6 +7256,11 @@ class Compiler
AssertionDsc* optAssertionTabPrivate; // table that holds info about value assignments
AssertionIndex optAssertionCount; // total number of assertions in the assertion table
AssertionIndex optMaxAssertionCount;
bool optCanPropLclVar;
bool optCanPropEqual;
bool optCanPropNonNull;
bool optCanPropBndsChk;
bool optCanPropSubRange;

public:
void optVnNonNullPropCurStmt(BasicBlock* block, Statement* stmt, GenTree* tree);
Expand Down