Marcus,
when building for aarch64-linux-gnu with --enable-checking=yes,rtl, I run into
the following error:
...
In file included from src/libgcc/libgcc2.c:56:0:
src/libgcc/libgcc2.c: In function ‘__floattisf’:
src/libgcc/libgcc2.h:200:20: internal compiler error: RTL check: expected code
'const_double' and not mode 'VOID', have code 'const_double' and mode 'VOID' in
aarch64_float_const_representable_p, at config/aarch64/aarch64.c:8481
#define __NDW(a,b) __ ## a ## ti ## b
^
src/libgcc/libgcc2.h:293:21: note: in expansion of macro ‘__NDW’
#define __floatdisf __NDW(float,sf)
^
src/libgcc/libgcc2.c:1569:14: note: in expansion of macro ‘__floatdisf’
#define FUNC __floatdisf
^
src/libgcc/libgcc2.c:1579:1: note: in expansion of macro ‘FUNC’
FUNC (DWtype u)
^
0xc1a278 rtl_check_failed_code_mode(rtx_def const*, rtx_code, machine_mode,
bool, char const*, int, char const*)
src/gcc/rtl.c:833
0x1062b7b aarch64_float_const_representable_p(rtx_def*)
src/gcc/config/aarch64/aarch64.c:8481
0x1052ae2 aarch64_rtx_costs
src/gcc/config/aarch64/aarch64.c:5003
0x1059a9c aarch64_rtx_costs_wrapper
src/gcc/config/aarch64/aarch64.c:5804
0xc38f1a rtx_cost(rtx_def*, rtx_code, int, bool)
src/gcc/rtlanal.c:3878
0xb159a9 avoid_expensive_constant
src/gcc/optabs.c:1389
0xb15ca9 expand_binop_directly
src/gcc/optabs.c:1441
0xb161e7 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
src/gcc/optabs.c:1568
0x87f27f expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
src/gcc/expr.c:9200
0x87fe4b expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
src/gcc/expr.c:9388
0x879534 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
src/gcc/expr.c:7921
0x79a720 expand_normal
src/gcc/expr.h:471
0x79cdb3 do_jump_by_parts_greater
src/gcc/dojump.c:741
0x79b682 do_jump_1(tree_code, tree_node*, tree_node*, rtx_def*, rtx_def*, int)
src/gcc/dojump.c:280
0x79a8ce jumpifnot_1(tree_code, tree_node*, tree_node*, rtx_def*, int)
src/gcc/dojump.c:138
0x700de4 expand_gimple_cond
src/gcc/cfgexpand.c:2145
0x70ed7f expand_gimple_basic_block
src/gcc/cfgexpand.c:5063
0x71189c execute
src/gcc/cfgexpand.c:5803
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
...
We assert here during REAL_VALUE_FROM_CONST_DOUBLE because x has VOIDmode, which
means it has integer rather than floating point type:
...
bool
aarch64_float_const_representable_p (rtx x)
{
/* This represents our current view of how many bits
make up the mantissa. */
int point_pos = 2 * HOST_BITS_PER_WIDE_INT - 1;
int exponent;
unsigned HOST_WIDE_INT mantissa, mask;
REAL_VALUE_TYPE r, m;
bool fail;
if (!CONST_DOUBLE_P (x))
return false;
REAL_VALUE_FROM_CONST_DOUBLE (r, x);
...
Attached patch fixes the ICE by handling the case that x is VOIDmode, and allows
me to complete the build.
OK for trunk if build and test succeeds?
I think the call site in aarch64_rtx_costs may need a separate fix.
Thanks,
- Tom
2014-05-30 Tom de Vries <t...@codesourcery.com>
* config/aarch64/aarch64.c (aarch64_float_const_representable_p): Handle
case that x has VOIDmode.
---
gcc/config/aarch64/aarch64.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 4ece0c6..ce0e7dc 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -8478,6 +8478,9 @@ aarch64_float_const_representable_p (rtx x)
if (!CONST_DOUBLE_P (x))
return false;
+ if (GET_MODE (x) == VOIDmode)
+ return false;
+
REAL_VALUE_FROM_CONST_DOUBLE (r, x);
/* We cannot represent infinities, NaNs or +/-zero. We won't
--
1.9.1
