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authorAlan Modra <amodra@gmail.com>2020-10-01 19:14:09 +0930
committerAlan Modra <amodra@gmail.com>2020-10-02 08:36:25 +0930
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[RS6000] ICE in decompose, at rtl.h:2282
during RTL pass: fwprop1 gcc.dg/pr82596.c: In function 'test_cststring': gcc.dg/pr82596.c:27:1: internal compiler error: in decompose, at rtl.h:2282 -m32 gcc/testsuite/gcc.dg/pr82596.c fails along with other tests after applying rtx_cost patches, which exposed a backend bug. legitimize_address when presented with the following address (plus (reg) (const_int 0x7ffffffff)) attempts to rewrite it as a high/low sum. The low part is 0xffff, or -1, making the high part 0x80000000. But this is no longer canonical for SImode. * config/rs6000/rs6000.c (rs6000_legitimize_address): Use gen_int_mode for high part of address constant.
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