[llvm-bugs] [Bug 44604] New: [Attributor] Loop-aware attribute handling? (alignment)

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Tue Jan 21 04:08:23 PST 2020


            Bug ID: 44604
           Summary: [Attributor] Loop-aware attribute handling?
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Global Analyses
          Assignee: unassignedbugs at nondot.org
          Reporter: lebedev.ri at gmail.com
                CC: llvm-bugs at lists.llvm.org


// Type your code here, or load an example.
void test(int* dst, int count) {
    dst = (int*)__builtin_assume_aligned(dst, 1024);
    for(int i = 0; i != count; ++i) 
        dst[i] = 42;

normal clang -O3 -fno-unroll-loops does result in propagating of alignment
to store. But attributor fails to do that.


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