Skip to content

R
riscv-gcc-1
Commit 709ab4fc by Richard Stallman
Options

(simplify_binary_operation): Reject CCmode in A & (~A) -> 0. 

Also fix typos in previous change.

From-SVN: r4295
parent a878dab7
Showing with 5 additions and 4 deletions
gcc/cse.c
......@@ -3599,7 +3599,7 @@ simplify_binary_operation (code, mode, op0, op1)
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
|| (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0)))
&& ! side_effects_p (op0)
&& mode == CCmode)
&& mode != CCmode)
return constm1_rtx;
break;
......@@ -3610,7 +3610,7 @@ simplify_binary_operation (code, mode, op0, op1)
&& (INTVAL (op1) & GET_MODE_MASK (mode)) == GET_MODE_MASK (mode))
return gen_rtx (NOT, mode, op0);
if (op0 == op1 && ! side_effects_p (op0)
&& mode == CCmode)
&& mode != CCmode)
return const0_rtx;
break;
......@@ -3621,12 +3621,13 @@ simplify_binary_operation (code, mode, op0, op1)
&& (INTVAL (op1) & GET_MODE_MASK (mode)) == GET_MODE_MASK (mode))
return op0;
if (op0 == op1 && ! side_effects_p (op0)
&& mode == CCmode)
&& mode != CCmode)
return op0;
/* A & (~A) -> 0 */
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
|| (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0)))
&& ! side_effects_p (op0))
&& ! side_effects_p (op0)
&& mode != CCmode)
return const0_rtx;
break;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment