https://llvm.org/bugs/show_bug.cgi?id=25933
Bug ID: 25933
Summary: PowerPC64 missing 16 byte atomic ops
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The following test case:
int main(void)
{
__uint128_t x;
__sync_val_compare_and_swap_16(&x, 1, 0);
}
works on gcc:
$ gcc -mcpu=power8 -O2 test.c
but fails on clang:
$ clang -mcpu=power8 -O2 test.c
/tmp/test-bae14f.o: In function `main':
test.c:(.text+0x34): undefined reference to `__sync_val_compare_and_swap_16'
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