[Bug 937864] Re: Produces NEON code on armhf even when explicitly asked not to

[Michael Collison]

Neon code is not produced by linaro 4.7, 4.8 or 4.9 for the provided
test case.

** Changed in: gcc-linaro
       Status: Incomplete => Won't Fix

** Changed in: gcc-linaro
     Assignee: (unassigned) => Michael Collison (michael-collison)

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Title:
  Produces NEON code on armhf even when explicitly asked not to

Status in Linaro GCC:
  Won't Fix
Status in “gcc-4.6” package in Ubuntu:
  Incomplete
Status in “gcc-4.6” package in Debian:
  Fix Released

Bug description:
  As referenced in Debian bug #657157:

  Looking at a FTBFS bug on armhf in the pytables package. gcc-4.6 seems
  to be emitting NEON code even when explicitly told not to:

  (sid)93sam at harris:~$ gcc -c typeconv.c -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -mthumb -o typeconv.o
  (sid)93sam at harris:~$ objdump -D typeconv.o | grep vldr
    a8:   ed93 6b00       vldr    d6, [r3]
    ae:   ed93 7b00       vldr    d7, [r3]
    be:   ed9f 7b44       vldr    d7, [pc, #272]  ; 1d0 <conv_float64_timeval32+0x1d0>
   118:   ed9f 7b2f       vldr    d7, [pc, #188]  ; 1d8 <conv_float64_timeval32+0x1d8>

  There's other NEON code in the assembly output too, the grep is just
  to show an example...

  The single small source file is attached.

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