Changes in directory llvm/lib/Bitcode/Writer:
BitcodeWriter.cpp updated: 1.40 -> 1.41
---
Log message:
add an abbrev for loads. This shrinks the function block about 50K, from:
Block ID #12 (FUNCTION_BLOCK):
Num Instances: 2344
Total Size: 8.8434e+06b/1.10542e+06B/276356W
% of file: 35.6726
Average Size: 3772.78b/471.598B/117.899W
Tot/Avg SubBlocks: 4065/1.73422
Tot/Avg Abbrevs: 0/0
Tot/Avg Records: 128487/54.8153
% Abbrev Recs: 0
to:
Block ID #12 (FUNCTION_BLOCK):
Num Instances: 2344
Total Size: 8.44518e+06b/1.05565e+06B/263912W
% of file: 34.6203
Average Size: 3602.89b/450.362B/112.59W
Tot/Avg SubBlocks: 4065/1.73422
Tot/Avg Abbrevs: 0/0
Tot/Avg Records: 128487/54.8153
% Abbrev Recs: 22.2077
---
Diffs of the changes: (+22 -1)
BitcodeWriter.cpp | 23 ++++++++++++++++++++++-
1 files changed, 22 insertions(+), 1 deletion(-)
Index: llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
diff -u llvm/lib/Bitcode/Writer/BitcodeWriter.cpp:1.40
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp:1.41
--- llvm/lib/Bitcode/Writer/BitcodeWriter.cpp:1.40 Sat May 5 02:36:14 2007
+++ llvm/lib/Bitcode/Writer/BitcodeWriter.cpp Sat May 5 02:44:49 2007
@@ -40,7 +40,10 @@
CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
CONSTANTS_INTEGER_ABBREV,
CONSTANTS_CE_CAST_Abbrev,
- CONSTANTS_NULL_Abbrev
+ CONSTANTS_NULL_Abbrev,
+
+ // FUNCTION_BLOCK abbrev id's.
+ FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV
};
@@ -722,6 +725,7 @@
Vals.push_back(VE.getValueID(I.getOperand(0))); // ptr.
Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
Vals.push_back(cast<LoadInst>(I).isVolatile());
+ AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
break;
case Instruction::Store:
Code = bitc::FUNC_CODE_INST_STORE;
@@ -947,6 +951,8 @@
assert(0 && "Unexpected abbrev ordering!");
}
+
+
{ // SETTYPE abbrev for CONSTANTS_BLOCK.
BitCodeAbbrev *Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
@@ -986,6 +992,21 @@
assert(0 && "Unexpected abbrev ordering!");
}
+ // FIXME: This should only use space for first class types!
+
+ { // INST_LOAD abbrev for FUNCTION_BLOCK.
+ BitCodeAbbrev *Abbv = new BitCodeAbbrev();
+ Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
+ Log2_32_Ceil(VE.getTypes().size()+1)));
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
+ if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
+ Abbv) != FUNCTION_INST_LOAD_ABBREV)
+ assert(0 && "Unexpected abbrev ordering!");
+ }
+
Stream.ExitBlock();
}
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