diff options
author | Ivan A. Kosarev <ikosarev@accesssoftek.com> | 2018-01-17 13:29:54 +0000 |
---|---|---|
committer | Ivan A. Kosarev <ikosarev@accesssoftek.com> | 2018-01-17 13:29:54 +0000 |
commit | 6adafb6098c8e5c38e4be89d2c478404721580e6 (patch) | |
tree | a062c7e4a1a62d0183417e17653e2e863df4209b /lib/IR/MDBuilder.cpp | |
parent | 538e75cb32e3de5603331bbc89f9c0f14eb6eeed (diff) |
[Transforms] Support making mutable versions of new-format TBAA access tags
Differential Revision: https://reviews.llvm.org/D41565
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322650 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/IR/MDBuilder.cpp')
-rw-r--r-- | lib/IR/MDBuilder.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/IR/MDBuilder.cpp b/lib/IR/MDBuilder.cpp index 9d467fb9f6d..c32a989ef2c 100644 --- a/lib/IR/MDBuilder.cpp +++ b/lib/IR/MDBuilder.cpp @@ -232,6 +232,33 @@ MDNode *MDBuilder::createTBAAAccessTag(MDNode *BaseType, MDNode *AccessType, return MDNode::get(Context, {BaseType, AccessType, OffsetNode, SizeNode}); } +MDNode *MDBuilder::createMutableTBAAAccessTag(MDNode *Tag) { + MDNode *BaseType = cast<MDNode>(Tag->getOperand(1)); + MDNode *AccessType = cast<MDNode>(Tag->getOperand(1)); + Metadata *OffsetNode = Tag->getOperand(2); + uint64_t Offset = mdconst::extract<ConstantInt>(OffsetNode)->getZExtValue(); + + bool NewFormat = isa<MDNode>(AccessType->getOperand(0)); + + // See if the tag is already mutable. + unsigned ImmutabilityFlagOp = NewFormat ? 4 : 3; + if (Tag->getNumOperands() <= ImmutabilityFlagOp) + return Tag; + + // If Tag is already mutable then return it. + Metadata *ImmutabilityFlagNode = Tag->getOperand(ImmutabilityFlagOp); + if (!mdconst::extract<ConstantInt>(ImmutabilityFlagNode)->getValue()) + return Tag; + + // Otherwise, create another node. + if (!NewFormat) + return createTBAAStructTagNode(BaseType, AccessType, Offset); + + Metadata *SizeNode = Tag->getOperand(3); + uint64_t Size = mdconst::extract<ConstantInt>(SizeNode)->getZExtValue(); + return createTBAAAccessTag(BaseType, AccessType, Offset, Size); +} + MDNode *MDBuilder::createIrrLoopHeaderWeight(uint64_t Weight) { SmallVector<Metadata *, 2> Vals(2); Vals[0] = createString("loop_header_weight"); |