avx bugs

assembly

        .file   "test-avx.c"
        .text
        .globl  add
        .align  16, 0x90
        .type   add,@function
add:                                    # @add
        .cfi_startproc
# BB#0:                                 # %entry
        vaddpd  %ymm1, %ymm0, %ymm0
        ret
.Ltmp0:
        .size   add, .Ltmp0-add
        .cfi_endproc


        .ident  "clang version 3.4 (http://llvm.org/git/clang.git c27813a0ee224ef24671a36e8c6a6219cb20dbad) (http://llvm.org/git/llvm.git 593c23caad07bd8b4d042db897b7d9fed7b4f213)"
        .section        ".note.GNU-stack","",@progbits

llvmir

; ModuleID = 'test-avx.c'
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nounwind readnone uwtable
define <4 x double> @add(<4 x double> %x, <4 x double> %y) #0 {
entry:
  %add = fadd <4 x double> %x, %y
  ret <4 x double> %add
}

attributes #0 = { nounwind readnone uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }

!llvm.ident = !{!0}

!0 = metadata !{metadata !"clang version 3.4 (http://llvm.org/git/clang.git c27813a0ee224ef24671a36e8c6a6219cb20dbad) (http://llvm.org/git/llvm.git 593c23caad07bd8b4d042db897b7d9fed7b4f213)"}