[LLVMbugs] [Bug 8643] New: [memcpyopt] missed memcpy optimization

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Nov 17 23:45:52 PST 2010


           Summary: [memcpyopt] missed memcpy optimization
           Product: libraries
           Version: 1.0
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: clattner at apple.com
                CC: llvmbugs at cs.uiuc.edu

Transforms/MemCpyOpt/memcpy.ll:@test1 optimizes into this, the memcpy can be

define void @ccosl(%0* sret %agg.result, x86_fp80 %z.0, x86_fp80 %z.1) nounwind
  %tmp2 = alloca %0
  %tmp5 = fsub x86_fp80 0xK80000000000000000000, %z.1
  call void @ccoshl(%0* sret %tmp2, x86_fp80 %tmp5, x86_fp80 %z.0) nounwind
  %tmp219 = bitcast %0* %tmp2 to i8*
  %agg.result21 = bitcast %0* %agg.result to i8*
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %agg.result21, i8* %tmp219, i32 32,
i32 16, i1 false)
  ret void

Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.

More information about the llvm-bugs mailing list