https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68685
Bug ID: 68685
Summary: LTO build hits ICE in copy_to_mode_reg, at
explow.c:595
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: anton at samba dot org
Target Milestone: ---
Created attachment 36905
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36905&action=edit
Test case
On a powerpc64le-linux target, the attached test case when built with:
gcc -O2 -flto -mno-vsx -mno-altivec -c pgtable_64.i
gcc -O2 -flto -mno-vsx -maltivec -c xor_vmx.i
gcc -O2 -flto -mno-vsx -maltivec pgtable_64.o xor_vmx.o
fails with:
arch/powerpc/lib/xor_vmx.c:127:0: internal compiler error: in copy_to_mode_reg,
at explow.c:595
XOR(v1, v2);
0x1036578f copy_to_mode_reg(machine_mode, rtx_def*)
../../gcc/gcc/explow.c:595
0x10b12e03 rs6000_expand_binop_builtin
../../gcc/gcc/config/rs6000/rs6000.c:12746
0x10b4e047 rs6000_expand_builtin
../../gcc/gcc/config/rs6000/rs6000.c:14798
0x102025ff expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
../../gcc/gcc/builtins.c:5610
0x1038484b expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.c:10578
0x1039264b store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc/gcc/expr.c:5405
0x103945a3 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/gcc/expr.c:5174
0x102302eb expand_call_stmt
../../gcc/gcc/cfgexpand.c:2635
0x102302eb expand_gimple_stmt_1
../../gcc/gcc/cfgexpand.c:3525
0x102302eb expand_gimple_stmt
../../gcc/gcc/cfgexpand.c:3688
0x10232abf expand_gimple_basic_block
../../gcc/gcc/cfgexpand.c:5694
0x1023a167 execute
../../gcc/gcc/cfgexpand.c:6309
