6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 20:32:21 +00:00
Code Issues Projects Releases Wiki Activity

Add a fast path to EvaluateSymbolicAdd. This avoids computing symbol addresses

Browse Source 
which then avoids running EnsureValid.
This cuts the assembly time of the testcase in PR8711 from 2:50 minutes to 1
minute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120697 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2010-12-02 07:53:12 +00:00
parent 37a0b54fb5
commit 76507f14ed
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/MC/MCExpr.cpp
View File

@ -294,12 +294,20 @@ static bool EvaluateSymbolicAdd(const MCAsmLayout *Layout, bool InSet,
if (Layout && A && B) {
const MCSymbol &SA = A->getSymbol();
const MCSymbol &SB = B->getSymbol();
const MCObjectFormat &F =
Layout->getAssembler().getBackend().getObjectFormat();
const MCAssembler &Asm = Layout->getAssembler();
const MCObjectFormat &F = Asm.getBackend().getObjectFormat();
if (SA.isDefined() && SB.isDefined() && F.isAbsolute(InSet, SA, SB)) {
const MCAssembler &Asm = Layout->getAssembler();
MCSymbolData &AD = Asm.getSymbolData(A->getSymbol());
MCSymbolData &BD = Asm.getSymbolData(B->getSymbol());
if (AD.getFragment() == BD.getFragment()) {
Res = MCValue::get(+ AD.getOffset()
- BD.getOffset()
+ LHS.getConstant()
+ RHS_Cst);
return true;
}
Res = MCValue::get(+ Layout->getSymbolAddress(&AD)
- Layout->getSymbolAddress(&BD)
+ LHS.getConstant()