From: "Dragan Mladjenovic" <dmladjeno...@wavecomp.com> This was dormant for quite some time, but it started happening for me on gcc.c-torture/compile/pr65153.c sometime after r276645 for -mabi=32 linux runs.
The pattern accepts any SMALL_OPERAND constant value while it asserts during the final that the value is in the mode size range. I this case it happens that combine_and_move_insns during ira makes a pattern with negative "shift count" which fails at final stage. This simple fix just truncates the constant operand to mode size the same as shift patterns. gcc/ChangeLog: 2019-11-12 Dragan Mladjenovic <dmladjeno...@wavecomp.com> * config/mips/mips.md (rotr<mode>3): Sanitize the constant argument instead of asserting its value. --- Ok, for trunk and backport to gcc 9 and 8 branches? gcc/config/mips/mips.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md index 658f5e6..1d63aca 100644 --- a/gcc/config/mips/mips.md +++ b/gcc/config/mips/mips.md @@ -5845,8 +5845,8 @@ "ISA_HAS_ROR" { if (CONST_INT_P (operands[2])) - gcc_assert (INTVAL (operands[2]) >= 0 - && INTVAL (operands[2]) < GET_MODE_BITSIZE (<MODE>mode)); + operands[2] = GEN_INT (INTVAL (operands[2]) + & (GET_MODE_BITSIZE (<MODE>mode) - 1)); return "<d>ror\t%0,%1,%2"; } -- 1.9.1