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hoist the check for alloca size up so that it controls CanConvertToScalar

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as well as isSafeAllocaToScalarRepl.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65755 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-03-01 02:26:47 +00:00
parent 870b80722f
commit af89a3f1d3
1 changed files with 5 additions and 3 deletions
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8
lib/Transforms/Scalar/ScalarReplAggregates.cpp
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@ -253,11 +253,13 @@ bool SROA::performScalarRepl(Function &F) {
// (allocations OF arrays are ok though), and an allocation of a scalar // (allocations OF arrays are ok though), and an allocation of a scalar
// value cannot be decomposed at all. // value cannot be decomposed at all.
uint64_t AllocaSize = TD->getTypePaddedSize(AI->getAllocatedType()); uint64_t AllocaSize = TD->getTypePaddedSize(AI->getAllocatedType());
// Do not promote any struct whose size is too big.
if (AllocaSize < SRThreshold)
continue;
if ((isa<StructType>(AI->getAllocatedType()) || if ((isa<StructType>(AI->getAllocatedType()) ||
isa<ArrayType>(AI->getAllocatedType())) && isa<ArrayType>(AI->getAllocatedType())) &&
// Do not promote any struct whose size is too big.
AllocaSize < SRThreshold &&
// Do not promote any struct into more than "32" separate vars. // Do not promote any struct into more than "32" separate vars.
getNumSAElements(AI->getAllocatedType()) < SRThreshold/4) { getNumSAElements(AI->getAllocatedType()) < SRThreshold/4) {
// Check that all of the users of the allocation are capable of being // Check that all of the users of the allocation are capable of being