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riscv-gcc-1
Commit 5c0e1091 by Jim Wilson
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(simplify_and_const_int, LSHIFTRT case): Must be at 

least as many sign bit copies as bits in mask.

From-SVN: r4868
parent a5e9b124
Showing with 4 additions and 1 deletions
gcc/combine.c
......@@ -6118,7 +6118,10 @@ simplify_and_const_int (x, mode, varop, constop)
+ num_sign_bit_copies (XEXP (varop, 0),
GET_MODE (XEXP (varop, 0))))
>= GET_MODE_BITSIZE (GET_MODE (varop)))
&& exact_log2 (constop + 1) >= 0)
&& exact_log2 (constop + 1) >= 0
&& (num_sign_bit_copies (XEXP (varop, 0),
GET_MODE (XEXP (varop, 0)))
>= exact_log2 (constop + 1)))
varop
= gen_rtx_combine (LSHIFTRT, GET_MODE (varop), XEXP (varop, 0),
GEN_INT (GET_MODE_BITSIZE (GET_MODE (varop))
......
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