[cfe-dev] "auto *IL = dyn_cast<IntegerLiteral>(e); " IL becomes NULL fails for negative integers.
Keane, Erich via cfe-dev
cfe-dev at lists.llvm.org
Sat Nov 2 13:29:02 PDT 2019
The -100 is not the integer literal for 100 less than 0. It is the application of the unary operator '-' to the integer literal 100.
If you want to get the value, do the overload of isConstantExpr on Expr they takes a reference to APValue.
On Nov 2, 2019 1:16 PM, Devendran Mani via cfe-dev <cfe-dev at lists.llvm.org> wrote:
I need a support to find the below *IL null pointer return for negative
const Expr *e = vDecl->getInit();
auto *IL = dyn_cast<IntegerLiteral>(e);
double val = IL->getValue().signedRoundToDouble();
cout << "val:" val;
int val = 100; (int val = -100;)
if the local variable is positive ex: int var 100; then cout prints the
right value "100".
But if the local variable is negative ex: int var -100; then IL becomes
NULL and cout is not executed.
Please help me root cause this issue.
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