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Enable sibling call optimization of libcalls which are expanded during

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legalization time. Since at legalization time there is no mapping from
SDNode back to the corresponding LLVM instruction and the return
SDNode is target specific, this requires a target hook to check for
eligibility. Only x86 and ARM support this form of sibcall optimization
right now.
rdar://8707777


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120501 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-11-30 23:55:39 +00:00
parent 3f8c110dc6
commit 3d2125c9db
13 changed files with 229 additions and 98 deletions
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7
include/llvm/CodeGen/Analysis.h
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@ -23,8 +23,10 @@
namespace llvm {
class TargetLowering;
class GlobalVariable;
class TargetLowering;
class SDNode;
class SelectionDAG;
/// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
/// of insertvalue or extractvalue indices that identify a member, return
@ -75,6 +77,9 @@ ISD::CondCode getICmpCondCode(ICmpInst::Predicate Pred);
bool isInTailCallPosition(ImmutableCallSite CS, Attributes CalleeRetAttr,
const TargetLowering &TLI);
bool isInTailCallPosition(SelectionDAG &DAG, SDNode *Node,
const TargetLowering &TLI);
} // End llvm namespace
#endif