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Change ConstantSDNode and ConstantFPSDNode to use ConstantInt* and

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ConstantFP* instead of APInt and APFloat directly.

This reduces the amount of time to create ConstantSDNode
and ConstantFPSDNode nodes when ConstantInt* and ConstantFP*
respectively are already available, as is the case in
SelectionDAGBuild.cpp. Also, it reduces the amount of time
to legalize constants into constant pools, and the amount of
time to add ConstantFP operands to MachineInstrs, due to
eliminating ConstantInt::get and ConstantFP::get calls.

It increases the amount of work needed to create new constants
in cases where the client doesn't already have a ConstantInt*
or ConstantFP*, such as legalize expanding 64-bit integer constants
to 32-bit constants. And it adds a layer of indirection for the
accessor methods. But these appear to be outweight by the benefits
in most cases.

It will also make it easier to make ConstantSDNode and
ConstantFPNode more consistent with ConstantInt and ConstantFP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56162 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-09-12 18:08:03 +00:00
parent 913d3dfac4
commit 4fbd796a12
10 changed files with 53 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/llvm/CodeGen/SelectionDAG.h
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@ -231,6 +231,7 @@ public:
//
SDValue getConstant(uint64_t Val, MVT VT, bool isTarget = false);
SDValue getConstant(const APInt &Val, MVT VT, bool isTarget = false);
SDValue getConstant(const ConstantInt &Val, MVT VT, bool isTarget = false);
SDValue getIntPtrConstant(uint64_t Val, bool isTarget = false);
SDValue getTargetConstant(uint64_t Val, MVT VT) {
return getConstant(Val, VT, true);
@ -238,14 +239,21 @@ public:
SDValue getTargetConstant(const APInt &Val, MVT VT) {
return getConstant(Val, VT, true);
}
SDValue getTargetConstant(const ConstantInt &Val, MVT VT) {
return getConstant(Val, VT, true);
}
SDValue getConstantFP(double Val, MVT VT, bool isTarget = false);
SDValue getConstantFP(const APFloat& Val, MVT VT, bool isTarget = false);
SDValue getConstantFP(const ConstantFP &CF, MVT VT, bool isTarget = false);
SDValue getTargetConstantFP(double Val, MVT VT) {
return getConstantFP(Val, VT, true);
}
SDValue getTargetConstantFP(const APFloat& Val, MVT VT) {
return getConstantFP(Val, VT, true);
}
SDValue getTargetConstantFP(const ConstantFP &Val, MVT VT) {
return getConstantFP(Val, VT, true);
}
SDValue getGlobalAddress(const GlobalValue *GV, MVT VT,
int offset = 0, bool isTargetGA = false);
SDValue getTargetGlobalAddress(const GlobalValue *GV, MVT VT,