[llvm-bugs] [Bug 33559] New: -Wshorten-64-to-32 doesn't handle +=
via llvm-bugs
llvm-bugs at lists.llvm.org
Thu Jun 22 15:19:56 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=33559
Bug ID: 33559
Summary: -Wshorten-64-to-32 doesn't handle +=
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangbugs at nondot.org
Reporter: smeenai at fb.com
CC: alexander.v.shaposhnikov at gmail.com,
compnerd at compnerd.org, llvm-bugs at lists.llvm.org,
richard-llvm at metafoo.co.uk
% cat reduced.c
void f(int x, long long y) {
x += y;
}
% clang -fsyntax-only -Wshorten-64-to-32 reduced.c
# no warning
Compare to
% cat reduced.c
void f(int x, long long y) {
x = x + y;
}
% clang -fsyntax-only -Wshorten-64-to-32 reduced.c
reduced.c:2:11: warning: implicit conversion loses integer precision: 'long
long' to 'int' [-Wshorten-64-to-32]
x = x + y;
~ ~~^~~
1 warning generated.
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