[LLVMbugs] [Bug 2549] New: Vector spills unaligned despite aligned stack

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Jul 14 13:24:39 PDT 2008


           Summary: Vector spills unaligned despite aligned stack
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nicolas at capens.net
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=1831)
 --> (http://llvm.org/bugs/attachment.cgi?id=1831)
Bitcode file generating movups for vector spills

Loads and stores between SSE registers and the stack due to spills currently
use the unaligned move instruction (movups), despite the stack being properly
16-byte aligned. It could use aligned moves (movaps) instead for better

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