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[Target] Reduce size of the LoadExtActions array in TargetLoweringBase by half. Saving ~18K bytes from the array.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266547 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2016-04-17 01:34:37 +00:00
parent 664e2c80b4
commit 9e15d9af12
1 changed files with 11 additions and 7 deletions
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18
include/llvm/Target/TargetLowering.h
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@ -603,7 +603,8 @@ public:
unsigned MemI = (unsigned) MemVT.getSimpleVT().SimpleTy;
assert(ExtType < ISD::LAST_LOADEXT_TYPE && ValI < MVT::LAST_VALUETYPE &&
MemI < MVT::LAST_VALUETYPE && "Table isn't big enough!");
return LoadExtActions[ValI][MemI][ExtType];
unsigned Shift = 4 * ExtType;
return (LegalizeAction)((LoadExtActions[ValI][MemI] >> Shift) & 0xf);
}
/// Return true if the specified load with extension is legal on this target.
@ -614,8 +615,8 @@ public:
/// Return true if the specified load with extension is legal or custom
/// on this target.
bool isLoadExtLegalOrCustom(unsigned ExtType, EVT ValVT, EVT MemVT) const {
return (getLoadExtAction(ExtType, ValVT, MemVT) == Legal ||
getLoadExtAction(ExtType, ValVT, MemVT) == Custom);
return getLoadExtAction(ExtType, ValVT, MemVT) == Legal ||
getLoadExtAction(ExtType, ValVT, MemVT) == Custom;
}
/// Return how this store with truncation should be treated: either it is
@ -1357,7 +1358,10 @@ protected:
LegalizeAction Action) {
assert(ExtType < ISD::LAST_LOADEXT_TYPE && ValVT.isValid() &&
MemVT.isValid() && "Table isn't big enough!");
LoadExtActions[(unsigned)ValVT.SimpleTy][MemVT.SimpleTy][ExtType] = Action;
assert((unsigned)Action < 0x10 && "too many bits for bitfield array");
unsigned Shift = 4 * ExtType;
LoadExtActions[ValVT.SimpleTy][MemVT.SimpleTy] &= ~((uint16_t)0xF << Shift);
LoadExtActions[ValVT.SimpleTy][MemVT.SimpleTy] |= (uint16_t)Action << Shift;
}
/// Indicate that the specified truncating store does not work with the
@ -1930,9 +1934,9 @@ private:
/// For each load extension type and each value type, keep a LegalizeAction
/// that indicates how instruction selection should deal with a load of a
/// specific value type and extension type.
LegalizeAction LoadExtActions[MVT::LAST_VALUETYPE][MVT::LAST_VALUETYPE]
[ISD::LAST_LOADEXT_TYPE];
/// specific value type and extension type. Uses 4-bits to store the action
/// for each of the 4 load ext types.
uint16_t LoadExtActions[MVT::LAST_VALUETYPE][MVT::LAST_VALUETYPE];
/// For each value type pair keep a LegalizeAction that indicates whether a
/// truncating store of a specific value type and truncating type is legal.