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| author | Alan Modra <amodra@gmail.com> | 2020-10-01 19:14:09 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2020-10-02 08:36:25 +0930 |
| commit | 4c69e61f4307865b95151006e480ae2022b30454 (patch) | |
| tree | efcf3a1081fe6d6ad8d3080f989a7148e8e04dad /gcc | |
| parent | d26cc5885a491dedad0bdf3468a7b91c1f75a868 (diff) | |
| download | gcc-4c69e61f4307865b95151006e480ae2022b30454.zip gcc-4c69e61f4307865b95151006e480ae2022b30454.tar.gz gcc-4c69e61f4307865b95151006e480ae2022b30454.tar.bz2 | |
[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.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 1b5b8e2..69c4f36 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -8455,7 +8455,7 @@ rs6000_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED, low_int = 0; high_int = INTVAL (XEXP (x, 1)) - low_int; sum = force_operand (gen_rtx_PLUS (Pmode, XEXP (x, 0), - GEN_INT (high_int)), 0); + gen_int_mode (high_int, Pmode)), 0); return plus_constant (Pmode, sum, low_int); } else if (GET_CODE (x) == PLUS |