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Re: [ARM] Fix RTL checking failure in Thumb mode


On 31/08/16 08:31, Eric Botcazou wrote:

Hi,

compiling any non-trivial program in Thumb mode yields with RTL checking:

eric@arcturus:~/build/gcc/arm-eabi> gcc/xgcc -Bgcc -S t.c -mthumb
t.c:4:5: internal compiler error: RTL check: expected code 'const_int', have
'reg' in thumb1_size_rtx_costs, at config/arm/arm.c:9130
  int foo (int a, int b, int c, int d, double i)
      ^~~
0xb0da47 rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int,
char const*)
         /home/eric/svn/gcc/gcc/rtl.c:811
0xf13472 thumb1_size_rtx_costs
         /home/eric/svn/gcc/gcc/config/arm/arm.c:9130
0xf1cd10 arm_size_rtx_costs
         /home/eric/svn/gcc/gcc/config/arm/arm.c:9239
0xf1cd10 arm_rtx_costs
         /home/eric/svn/gcc/gcc/config/arm/arm.c:11290

so even libgcc cannot be built.

(gdb) frame 2
#2  0x0000000000f13473 in thumb1_size_rtx_costs (x=x@entry=0x7ffff6a622d0,
     code=code@entry=SET, outer=outer@entry=INSN)
     at /home/eric/svn/gcc/gcc/config/arm/arm.c:9130
9130              || (UINTVAL (SET_SRC (x)) >= 256
(gdb) p debug_rtx(x)
(set (reg:SI 110)
     (reg:SI 111))

Proposed fix attached, built on arm-eabi, OK for the mainline?


Ok.
Thanks,
Kyrill



2016-08-31  Eric Botcazou  <ebotcazou@adacore.com>

	* config/arm/arm.c (thumb1_size_rtx_costs) <SET>: Add missing guard.
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