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jcf-write.c (generate_bytecode_insns): Optimize binary operations with equal operands without side-effects.

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* jcf-write.c (generate_bytecode_insns): Optimize binary operations
	with equal operands without side-effects.

From-SVN: r71684
This commit is contained in:
Roger Sayle 2003-09-23 15:49:53 +00:00 committed by Roger Sayle
parent ac20c67af1
commit 87750fef00
2 changed files with 7 additions and 2 deletions
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5
gcc/java/ChangeLog
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@ -1,3 +1,8 @@
2003-09-23 Roger Sayle <roger@eyesopen.com>
* jcf-write.c (generate_bytecode_insns): Optimize binary operations
with equal operands without side-effects.
2003-09-22 Jeff Sturm <jsturm@one-point.com>
* decl.c (java_init_decl_processing): Don't emit otable decls

4
gcc/java/jcf-write.c
View File

@ -2095,10 +2095,10 @@ generate_bytecode_insns (tree exp, int target, struct jcf_partial *state)
tree arg0 = TREE_OPERAND (exp, 0);
tree arg1 = TREE_OPERAND (exp, 1);
jopcode += adjust_typed_op (type, 3);
if (arg0 == arg1 && TREE_CODE (arg0) == SAVE_EXPR)
if (arg0 != NULL_TREE && operand_equal_p (arg0, arg1, 0))
{
/* fold may (e.g) convert 2*x to x+x. */
generate_bytecode_insns (TREE_OPERAND (arg0, 0), target, state);
generate_bytecode_insns (arg0, target, state);
emit_dup (TYPE_PRECISION (TREE_TYPE (arg0)) > 32 ? 2 : 1, 0, state);
}
else