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Avoid a Symbol -> Name -> Symbol conversion.

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Before this we were producing a TargetExternalSymbol from a MCSymbol.
That meant extracting the symbol name and fetching the symbol again
down the pipeline.

This patch adds a DAG.getMCSymbol that lets the MCSymbol pass unchanged on the
DAG.

Doing so removes the need for MO_NOPREFIX and fixes the root cause of pr23900,
allowing r240130 to be committed again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240300 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-06-22 17:46:53 +00:00
parent 2f801faafb
commit 09bbd16112
17 changed files with 103 additions and 46 deletions
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1
include/llvm/Target/TargetSelectionDAG.td
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@@ -341,6 +341,7 @@ def externalsym : SDNode<"ISD::ExternalSymbol", SDTPtrLeaf, [],
"ExternalSymbolSDNode">;
def texternalsym: SDNode<"ISD::TargetExternalSymbol", SDTPtrLeaf, [],
"ExternalSymbolSDNode">;
def mcsym: SDNode<"ISD::MCSymbol", SDTPtrLeaf, [], "MCSymbolSDNode">;
def blockaddress : SDNode<"ISD::BlockAddress", SDTPtrLeaf, [],
"BlockAddressSDNode">;
def tblockaddress: SDNode<"ISD::TargetBlockAddress", SDTPtrLeaf, [],