emit-rtl.c (paradoxical_subreg_p): New function.

	* emit-rtl.c (paradoxical_subreg_p): New function.
	* rtl.h (paradoxical_subreg_p): Declare.
	* combine.c (set_nonzero_bits_and_sign_copies, get_last_value,
	apply_distributive_law, simplify_comparison, simplify_set): Use it.
	* cse.c (record_jump_cond, cse_insn): Likewise.
	* expr.c (force_operand): Likewise.
	* rtlanal.c (num_sign_bit_copies1): Likewise.
	* reload1.c (eliminate_regs_1, strip_paradoxical_subreg): Likewise.
	* reload.c (push_secondary_reload, find_reloads_toplev): Likewise.
	(push_reload): Use precision to check for paradoxical subregs.
	* expmed.c (extract_bit_field_1): Likewise.

From-SVN: r175944

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index 2f2aaca..ac3c871 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1633,6 +1633,7 @@ extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
 
 /* In emit-rtl.c */
 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
+extern bool paradoxical_subreg_p (const_rtx);
 extern int subreg_lowpart_p (const_rtx);
 extern unsigned int subreg_lowpart_offset (enum machine_mode,
 					   enum machine_mode);