[cfe-commits] r67503 - in /cfe/trunk: lib/AST/ExprConstant.cpp test/Sema/const-eval.c
Eli Friedman
eli.friedman at gmail.com
Sun Mar 22 21:38:35 PDT 2009
Author: efriedma
Date: Sun Mar 22 23:38:34 2009
New Revision: 67503
URL: http://llvm.org/viewvc/llvm-project?rev=67503&view=rev
Log:
Minor enhancements to Evaluate.
Modified:
cfe/trunk/lib/AST/ExprConstant.cpp
cfe/trunk/test/Sema/const-eval.c
Modified: cfe/trunk/lib/AST/ExprConstant.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ExprConstant.cpp?rev=67503&r1=67502&r2=67503&view=diff
==============================================================================
--- cfe/trunk/lib/AST/ExprConstant.cpp (original)
+++ cfe/trunk/lib/AST/ExprConstant.cpp Sun Mar 22 23:38:34 2009
@@ -71,7 +71,7 @@
return false;
Result = !FloatResult.isZero();
return true;
- } else if (E->getType()->isPointerType()) {
+ } else if (E->getType()->hasPointerRepresentation()) {
APValue PointerResult;
if (!EvaluatePointer(E, PointerResult, Info))
return false;
@@ -79,8 +79,19 @@
// the check look like?
Result = PointerResult.getLValueBase() || PointerResult.getLValueOffset();
return true;
+ } else if (E->getType()->isAnyComplexType()) {
+ APValue ComplexResult;
+ if (!EvaluateComplex(E, ComplexResult, Info))
+ return false;
+ if (ComplexResult.isComplexFloat()) {
+ Result = !ComplexResult.getComplexFloatReal().isZero() ||
+ !ComplexResult.getComplexFloatImag().isZero();
+ } else {
+ Result = ComplexResult.getComplexIntReal().getBoolValue() ||
+ ComplexResult.getComplexIntImag().getBoolValue();
+ }
+ return true;
}
- // FIXME: Handle pointer-like types, complex types
return false;
}
@@ -890,21 +901,22 @@
APValue LHSValue;
if (!EvaluatePointer(E->getLHS(), LHSValue, Info))
return false;
-
+
APValue RHSValue;
if (!EvaluatePointer(E->getRHS(), RHSValue, Info))
return false;
-
- // FIXME: Is this correct? What if only one of the operands has a base?
+
+ // Reject any bases; this is conservative, but good enough for
+ // common uses
if (LHSValue.getLValueBase() || RHSValue.getLValueBase())
return false;
-
+
const QualType Type = E->getLHS()->getType();
const QualType ElementType = Type->getAsPointerType()->getPointeeType();
uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset();
D /= Info.Ctx.getTypeSize(ElementType) / 8;
-
+
return Success(D, E);
}
}
@@ -980,20 +992,20 @@
// __alignof__(void) = 1 as a gcc extension.
if (Ty->isVoidType())
return 1;
-
+
// GCC extension: alignof(function) = 4.
// FIXME: AlignOf shouldn't be unconditionally 4! It should listen to the
// attribute(align) directive.
if (Ty->isFunctionType())
return 4;
-
+
if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty))
return GetAlignOfType(QualType(EXTQT->getBaseType(), 0));
// alignof VLA/incomplete array.
if (const ArrayType *VAT = dyn_cast<ArrayType>(Ty))
return GetAlignOfType(VAT->getElementType());
-
+
// sizeof (objc class)?
if (isa<ObjCInterfaceType>(Ty))
return 1; // FIXME: This probably isn't right.
@@ -1010,7 +1022,7 @@
// to 1 in those cases.
if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
return Info.Ctx.getDeclAlignInBytes(DRE->getDecl());
-
+
if (const MemberExpr *ME = dyn_cast<MemberExpr>(E))
return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl());
@@ -1030,14 +1042,14 @@
else
return Success(GetAlignOfExpr(E->getArgumentExpr()), E);
}
-
+
QualType SrcTy = E->getTypeOfArgument();
// sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc
// extension.
if (SrcTy->isVoidType() || SrcTy->isFunctionType())
return Success(1, E);
-
+
// sizeof(vla) is not a constantexpr: C99 6.5.3.4p2.
if (!SrcTy->isConstantSizeType())
return false;
Modified: cfe/trunk/test/Sema/const-eval.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/const-eval.c?rev=67503&r1=67502&r2=67503&view=diff
==============================================================================
--- cfe/trunk/test/Sema/const-eval.c (original)
+++ cfe/trunk/test/Sema/const-eval.c Sun Mar 22 23:38:34 2009
@@ -50,3 +50,8 @@
int g23[(int)(1.0 / 1.0)] = { 1 };
int g24[(int)(1.0 / 1.0)] = { 1 , 2 }; // expected-warning {{excess elements in array initializer}}
int g25[(int)(1.0 + 1.0)], g26 = sizeof(g25);
+
+EVAL_EXPR(26, (_Complex double)0 ? -1 : 1)
+EVAL_EXPR(27, (_Complex int)0 ? -1 : 1)
+EVAL_EXPR(28, (_Complex double)1 ? 1 : -1)
+EVAL_EXPR(29, (_Complex int)1 ? 1 : -1)
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