[PATCH] Fix (part of) PR77399

[Andreas Schwab]

/usr/local/gcc/gcc-20161001/gcc/testsuite/gcc.dg/tree-ssa/forwprop-35.c:9:10: internal compiler error: in expand_float, at optabs.c:4774
0x4000000000af810f expand_float(rtx_def*, rtx_def*, int)
        ../../gcc/optabs.c:4774
0x4000000000699f6f expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier)
        ../../gcc/expr.c:8867
0x400000000067ae4f expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
        ../../gcc/expr.c:9720
0x400000000068be5f expand_normal
        ../../gcc/expr.h:285
0x400000000068be5f copy_blkmode_to_reg(machine_mode, tree_node*)
        ../../gcc/expr.c:2716
0x400000000042e16f expand_return
        ../../gcc/cfgexpand.c:3516
0x400000000042e16f expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3618
0x400000000042e16f expand_gimple_stmt
        ../../gcc/cfgexpand.c:3745
0x400000000043145f expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5752
0x400000000044006f execute
        ../../gcc/cfgexpand.c:6363

/daten/aranym/gcc/gcc-20161001/gcc/testsuite/gcc.dg/tree-ssa/forwprop-35.c:9:10: internal compiler error: in expand_float, at optabs.c:4774
0x9da792 expand_float(rtx_def*, rtx_def*, int)
        ../../gcc/optabs.c:4774
0x7b6a86 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier)
        ../../gcc/expr.c:8867
0x7a534b expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
        ../../gcc/expr.c:9720
0x7ae0b1 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool, tree_node*)
        ../../gcc/expr.c:5550
0x7b04e5 expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/expr.c:5316
0x6a307c expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3649
0x6a307c expand_gimple_stmt
        ../../gcc/cfgexpand.c:3745
0x6a4e96 expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5752
0x6aa806 execute
        ../../gcc/cfgexpand.c:6363

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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