[Bug target/64516] [4.x Regression] arm: wrong unaligned load generated

[markus at oberhumer dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64516

--- Comment #3 from Markus F.X.J. Oberhumer <markus at oberhumer dot com> ---
Just for reference, here is the expected result:

$ clang -target armv5-unknown-linux-gnu -marm -mfloat-abi=soft --version
clang version 3.5.1 (tags/RELEASE_351/final)
Target: armv5-unknown-linux-gnu
Thread model: posix

$ clang -target armv5-unknown-linux-gnu -marm -mfloat-abi=soft -O2 -Wall -W
-Wcast-align -c unaligned_load_bug.c

$ arm-linux-gnueabihf-objdump -d unaligned_load_bug.o

unaligned_load_bug.o:     file format elf32-littlearm

Disassembly of section .text:

00000000 <put16_unaligned>:
   0:   e5c01000        strb    r1, [r0]
   4:   e1a01421        lsr     r1, r1, #8
   8:   e5c01001        strb    r1, [r0, #1]
   c:   e12fff1e        bx      lr

00000010 <get16_unaligned>:
  10:   e5d01000        ldrb    r1, [r0]
  14:   e5d00001        ldrb    r0, [r0, #1]
  18:   e1810400        orr     r0, r1, r0, lsl #8
  1c:   e12fff1e        bx      lr

00000020 <put16_aligned>:
  20:   e1c010b0        strh    r1, [r0]
  24:   e12fff1e        bx      lr

00000028 <get16_aligned>:
  28:   e1d000b0        ldrh    r0, [r0]
  2c:   e12fff1e        bx      lr