OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

*** empty log message *** 

From-SVN: r823
This commit is contained in:
Richard Kenner 1992-04-23 07:17:07 -04:00
parent 6e3f07241c
commit 21648b45ae
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
gcc/cse.c
View File

@ -3270,11 +3270,15 @@ simplify_binary_operation (code, mode, op0, op1)
break;
case MINUS:
/* In IEEE floating point, x-0 is not the same as x. */
/* None of these optimizations can be done for IEEE
floating point. */
if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
&& GET_MODE_CLASS (mode) != MODE_INT)
break;
/* We can't assume x-x is 0 even with non-IEEE floating point. */
if (rtx_equal_p (op0, op1)
&& ! side_effects_p (op0)
/* We can't assume x-x is 0
even with non-IEEE floating point. */
&& GET_MODE_CLASS (mode) != MODE_FLOAT)
return const0_rtx;
@ -3282,12 +3286,6 @@ simplify_binary_operation (code, mode, op0, op1)
if (op0 == CONST0_RTX (mode))
return gen_rtx (NEG, mode, op1);
/* The remainer of these cases cannot be done for IEEE
floating-point. */
if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
&& GET_MODE_CLASS (mode) != MODE_INT)
break;
/* Subtracting 0 has no effect. */
if (op1 == CONST0_RTX (mode))
return op0;