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use new helpers to simplify code. 

llvm-svn: 90709
This commit is contained in:
Chris Lattner 2009-12-06 17:22:42 +00:00
parent 6d6f10fe91
commit 72ecc68e11
1 changed files with 4 additions and 8 deletions
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12
clang/lib/CodeGen/CGExpr.cpp
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@ -403,8 +403,7 @@ RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV,
// Shift to proper location.
if (StartBit)
Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit),
"bf.lo");
Val = Builder.CreateLShr(Val, StartBit, "bf.lo");
// Mask off unused bits.
llvm::Constant *LowMask = llvm::ConstantInt::get(VMContext,
@ -426,8 +425,7 @@ RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV,
HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared");
// Shift to proper location and or in to bitfield value.
HighVal = Builder.CreateShl(HighVal,
llvm::ConstantInt::get(EltTy, LowBits));
HighVal = Builder.CreateShl(HighVal, LowBits);
Val = Builder.CreateOr(Val, HighVal, "bf.val");
}
@ -613,8 +611,7 @@ void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst,
// LowVal = (LowVal & InvMask) | (NewVal << StartBit),
// with the shift of NewVal implicitly stripping the high bits.
llvm::Value *NewLowVal =
Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit),
"bf.value.lo");
Builder.CreateShl(NewVal, StartBit, "bf.value.lo");
LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared");
LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo");
@ -640,8 +637,7 @@ void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst,
// where the high bits of NewVal have already been cleared and the
// shift stripping the low bits.
llvm::Value *NewHighVal =
Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits),
"bf.value.high");
Builder.CreateLShr(NewVal, LowBits, "bf.value.high");
HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared");
HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi");