http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56080
Bug #: 56080
Summary: Incorrect code generated when changing lvalue of
pointer and using inline code and optimizations.
Classification: Unclassified
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: annou...@solidra.com
Created attachment 29253
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29253
C++ source to reproduce bug
The source below fails to operate correctly when __iowrite is inlined and
optimizations are set to -O2.
static inline void __iowrite(uint32_t src, uint32_t* dst) { *dst=src; }
#define iowrite32(val,iomem) __iowrite((uint32_t)(val), (uint32_t*)(iomem))
static void __miowrite32(void* d, void* s, unsigned count)
{
while (count--)
{
iowrite32(*((uint32_t*)s), d);
++(*((uint32_t**)&s));
++(*((uint32_t**)&d));
}
}
If I disable optimizations or change __iowrite to non-inlined the function
works correctly.
The attachment reproduces the error. Exit code is zero on success, 1 on error.
A message is printed on error.
Compile with g++ -c gcc_error -O2 gcc_error.cpp
