https://llvm.org/bugs/show_bug.cgi?id=24761
Bug ID: 24761
Summary: Clang rejects _Atomic compound assignment for pointer
arithmetic
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: hst...@ca.ibm.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
In C11 subclause 6.5.16.2 paragraph 1, an atomic pointer to a complete object
type is a valid LHS operand for operator += when the RHS has integer type.
Clang (trunk r247105) rejects.
### SOURCE (<stdin>):
void foo(int *_Atomic p) {
p += 1;
}
### COMPILER INVOCATION:
clang -cc1 -x c -std=c11
### ACTUAL OUTPUT:
<stdin>:2:6: error: invalid operands to binary expression ('_Atomic(int *)' and
'int')
p += 1;
~ ^ ~
1 error generated.
### EXPECTED OUTPUT:
Clean compile.
### COMPILER VERSION INFO (clang -v):
clang version 3.8.0 (trunk)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /main_trunk/ubuntu14_leppc/daily/latest/bin
Found candidate GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.2
Found candidate GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.3
Selected GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.3
Candidate multilib: .;@m64
Selected multilib: .;@m64
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