6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Address Duncan's comments on r164684:

Browse Source 
- Put statistics in alphabetical order
- Don't use getZextValue when building TableInt, just use APInts
- Introduce Create{Z,S}ExtOrTrunc in IRBuilder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164696 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hans Wennborg
2012-09-26 14:01:53 +00:00
parent 565df79b74
commit 50b7d70707
3 changed files with 31 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@@ -58,10 +58,10 @@ static cl::opt<bool>
SinkCommon("simplifycfg-sink-common", cl::Hidden, cl::init(true),
cl::desc("Sink common instructions down to the end block"));
STATISTIC(NumSpeculations, "Number of speculative executed instructions");
STATISTIC(NumLookupTables, "Number of switch instructions turned into lookup tables");
STATISTIC(NumBitMaps, "Number of switch instructions turned into bitmaps");
STATISTIC(NumLookupTables, "Number of switch instructions turned into lookup tables");
STATISTIC(NumSinkCommons, "Number of common instructions sunk down to the end block");
STATISTIC(NumSpeculations, "Number of speculative executed instructions");
namespace {
/// ValueEqualityComparisonCase - Represents a case of a switch.
@@ -3347,7 +3347,8 @@ SwitchLookupTable::SwitchLookupTable(Module &M,
APInt TableInt(TableSize * IT->getBitWidth(), 0);
for (uint64_t I = TableSize; I > 0; --I) {
TableInt <<= IT->getBitWidth();
TableInt |= cast<ConstantInt>(TableContents[I - 1])->getZExtValue();
ConstantInt *Val = cast<ConstantInt>(TableContents[I - 1]);
TableInt |= Val->getValue().zext(TableInt.getBitWidth());
}
BitMap = ConstantInt::get(M.getContext(), TableInt);
BitMapElementTy = IT;
@@ -3379,12 +3380,7 @@ Value *SwitchLookupTable::BuildLookup(Value *Index, IRBuilder<> &Builder) {
// Cast Index to the same type as the bitmap.
// Note: The Index is <= the number of elements in the table, so
// truncating it to the width of the bitmask is safe.
Value *ShiftAmt = Index;
IntegerType *IndexTy = cast<IntegerType>(Index->getType());
if (IndexTy->getBitWidth() < MapTy->getBitWidth())
ShiftAmt = Builder.CreateZExt(ShiftAmt, MapTy, "switch.zext");
else if (IndexTy->getBitWidth() > MapTy->getBitWidth())
ShiftAmt = Builder.CreateTrunc(ShiftAmt, MapTy, "switch.trunc");
Value *ShiftAmt = Builder.CreateZExtOrTrunc(Index, MapTy, "switch.cast");
// Multiply the shift amount by the element width.
ShiftAmt = Builder.CreateMul(ShiftAmt,