https://llvm.org/bugs/show_bug.cgi?id=25165
Bug ID: 25165
Summary: [Loop Idiom Recognizer] Missing basic memmov support
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Loop Optimizer
Assignee: unassignedb...@nondot.org
Reporter: mcros...@codeaurora.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
GCC is able to generate a memmov from the following loop, while LLVM is unable
to produce either a memset or memmov.
void test(int *a) {
for (int i = 0; i < 1023; ++i)
a[i] = a[i+1];
}
Benjamin added an implementation in r166875, but it was reverted. The pass was
then totally revamped and a new implementation may be required.
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