[Bug middle-end/20396] New: TRULY_NOOP_TRUNCATION ignored

[Bug middle-end/20396] New: TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

There are a number of places in the compiler that assume that
TRULY_NOOP_TRUNCATION will always be true.

-- 
           Summary: TRULY_NOOP_TRUNCATION ignored
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amylaar at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
OtherBugsDependingO 17652
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-03-09 21:17 -------
Created an attachment (id=8370)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8370&action=view)
proposed fix (of known problems)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-04-05 15:36 -------
Created an attachment (id=8536)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8536&action=view)
improved optabs.c patch

There are more instances of this problem in expand_binop.  Attached is an
updated optabs.c patch

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-04-08 17:04 -------
(In reply to comment #1)
:2005-03-09  J"orn Rennecke <joern.rennecke@st.com>
:            Richard Shann <rshann@superh.com>
:
:        * emit-rtl.c (gen_lowpart_common): Handle TRUNCATE.  Generate
:        TRUNCATE for non-noop truncations.
:        * expr.c (force_operand): Handle TRUNCATE.
:        * rtlanal.c (reg_overlap_mentioned_p): Likewise.
:        * loop.c (combine_movables): Take TRULY_NOOP_TRUNCATION into account.
:        * optabs.c (expand_binop): Likewise.
:        * expmed.c (extract_fixed_bit_field): Check before assuming that
:        op is a MEM.

Note that this a rather radical approach, in that it changes the behaviour
of gen_lowpart_common to generate TRUNCATE instead of an unsuitable
no-op truncation.  This is efficient to safeguard against wrong code from the
numerous places that call gen_lowpart, but the downside is that then TRUNCATE
appears in interesting new places.  This requires handling both in
machine-independent code and in every port that doesn't set
TRULY_NOOP_TRUNCATION to be always true.  As far as I can see, this affects
exactly two ports: SH64 and mips.  I will pursue this patch further if the
mips maintainers agree that this is a sensible approach to pursue, but not
otherwise.

In the meantime, I'll post a patch to gcc-patches that follows the more
'traditional' approach of fixing the callers of gen_lowpart, where these
problems have been detected.  This has very little risk of breaking an existing
port, but a high probability to be incomplete.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rsandifo at redhat dot com,
                   |                            |echristo at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-04-08 17:43 -------
Subject: Bug 20396

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	sh-elf-4_1-branch
Changes by:	amylaar@gcc.gnu.org	2005-04-08 17:41:35

Modified files:
	gcc/config/sh  : crt1.asm elf.h lib1funcs.asm libgcc-excl.ver 
	                 linux.h sh-protos.h sh.c sh.h sh.md shmedia.md 
	                 sshmedia.h t-sh64 ushmedia.h 
Added files:
	gcc/config/sh  : divtab.c newlib.h superh.h superh64.h t-superh 

Log message:
	2005-04-06  J"orn Rennecke <joern.rennecke@st.com>
	
	PR middle-end/20793:
	* integrate.c (allocate_initial_values): Update register liveness
	information.
	
	PR rtl-optimization/20769:
	* bt-load.c (compute_defs_uses_and_gen): Check for the blockage
	pattern emitted by expand_nl_goto_receiver.
	
	PR rtl-optimization/20756:
	* basic-block.h (PROP_DEAD_INSN): Define.
	* flow.c (propagate_one_insn): Set during mark_set_regs call
	for a dead insn.
	
	PR middle-end/20714
	* optabs.c (no_conflict_data): New struct.
	(no_conflict_move_test): New function.
	(emit_no_conflict_block): Use it.
	
	Workaround for PR rtl-optimization/20413:
	* sh.md (blt_media_i32, blt_media_i32+1): New splitters.
	
	Merge of SuperH / STM SH specific patches, including fix for
	PR target/20695:
	* config.gcc (sh*-superh-elf, sh*elf (newlib)): Use newlib.h
	when building with libgloss.
	(sh*elf): Implement --without-fp option.
	(sh64-superh-linux*): Don't multilib.
	(sh*-*-linux): Use sh3 as basic multilib.
	* config/sh/crt1.asm (SHmedia start): Add code to enable the MMU,
	and to set up vbr.  Enable FPU before calling set_fpscr.
	Load atexit address just before use.  Use __SH_FPU_ANY__.
	(SH3*/SH4* start): Add code to set up vbr.  Use __SH_FPU_ANY__.
	Set DN bit in fpscr.
	* config/sh/elf.h (SUBTARGET_ASM_ISA_SPEC): Merge into:
	config/sh/sh.h (SH_ASM_SPEC, SUBTARGET_ASM_ISA_SPEC): Here.
	* config/sh/lib1funcs.asm (HIDDEN_FUNC, HIDDEN_ALIAS): Define.
	(FMOVD_WORKS): Don't define for __SH5__.
	(ashiftrt_r4_0, ashiftrt_r4_1, ashiftrt_r4_2, ashiftrt_r4_3): Hide.
	(ashiftrt_r4_4, ashiftrt_r4_5, ashiftrt_r4_6, ashiftrt_r4_7): Hide.
	(ashiftrt_r4_8, ashiftrt_r4_9, ashiftrt_r4_10, ashiftrt_r4_11): Hide.
	(ashiftrt_r4_12, ashiftrt_r4_13, ashiftrt_r4_14, ashiftrt_r4_15): Hide.
	(ashiftrt_r4_16, ashiftrt_r4_17, ashiftrt_r4_18, ashiftrt_r4_19): Hide.
	(ashiftrt_r4_20, ashiftrt_r4_21, ashiftrt_r4_22, ashiftrt_r4_23): Hide.
	(ashiftrt_r4_24, ashiftrt_r4_25, ashiftrt_r4_26, ashiftrt_r4_27): Hide.
	(ashiftrt_r4_28, ashiftrt_r4_29, ashiftrt_r4_30, ashiftrt_r4_31): Hide.
	(ashiftrt_r4_32, ashrsi3, ashlsi3, lshrsi3, movmem, movstr): Hide.
	(movstrSI64, movmemSI64, movstrSI60, movmemSI60): Hide.
	(movstrSI56, movmemSI56, movstrSI52, movmemSI52): Hide.
	(movstrSI48, movmemSI48, movstrSI44, movmemSI44): Hide.
	(movstrSI40, movmemSI40, movstrSI36, movmemSI36): Hide.
	(movstrSI32, movmemSI32, movstrSI28, movmemSI28): Hide.
	(movstrSI24, movmemSI24, movstrSI20, movmemSI20): Hide.
	(movstrSI16,movmemSI16, movstrSI12,movmemSI12): Hide.
	(movstrSI8,movmemSI8, movstrSI4,movmemSI4): Hide.
	(movmemSI0, movstrSI0): Remove.
	(movmemSI4): Schedule last store into rts delay slot.
	(movmem): Shorten code.  Provide ENDFUNC.
	(movmem_i4_even, movmem_i4_odd, movmemSI12_i4, mulsi3): Hide.
	(mulsi3): Provide ENDFUNC.
	(sdivsi3_i4, sdivsi3_i4, udivsi3_i4, udivsi3, set_fpscr): Hide.
	(SH5 sdivsi3): Reimplement, using:
	(div_table): New, linear approximation table lookup for division seed.
	(sdivsi3_2): New SH5 entry point.
	(divdi3): Use hidden alias for udivdi3.
	(moddi3): Use hidden alias for umoddi3.
	(init_trampoline): Hide.  Provide exact ENDFUNC.
	(ic_invalidate): Hide.  Re-implement SH4 version, using
	(ic_invalidate_array): New global.
	(GCC_shcompact_return_trampoline, GCC_nested_trampoline): Hide.
	(GCC_push_shmedia_regs_nofpu): Only provide for __SH4_NOFPU__.
	(GCC_pop_shmedia_regs_nofpu): Likewise.
	* config/sh/libgcc-excl.ver (__mulsi3): Add.
	* config/sh/linux.h (TARGET_DEFAULT): Include TARGET_OPT_DEFAULT.
	* config/sh/sh-protos.h (sh_function_kind): New enum.
	(sh_gen_truncate, replace_n_hard_rtx): Declare.
	(function_symbol): Update declaration.
	(shmedia_cleanup_truncate, sh_contains_memref_p): Declare.
	* sh.c (cfgloop.h): Include.
	(TARGET_ADJUST_UNROLL_MAX): Redefine.
	(print_operand): Add '>' and 'U' support.  Handle TRUNCATE and
	SIGN_EXTEND.
	(function_sybol): Add arguments for target and kind of symbol.
	If not an ordinary function symbol, make sure the string becomes
	unique.  For PIC, load appropriately depending on kind of symbol.
	Changed all callers.
	(prepare_move_operands): Dont copy R0 to a pseudo for SHmedia.
	(multcosts): Check sh_multcost_str.  If not set, return 2 for
	SHMEDIA TARGET_SMALLCODE.
	(sh_rtx_costs): Lower some costs when outer_code is SET.  Add code
	for CONST_VECTOR, MINUS and PARALLEL.
	(gen_shifty_op): Don't emit nop.
	(expand_ashiftrt): While expanding to rtl, do shift by 31 using a
	register set to zero.
	(gen_datalabel_ref): Make sure that the string is shared.
	(MAX_POOL_SIZE): Define as 372.
	(find_barrier): Remove spurious adjustment.
	(sh_media_register_for_return): Return -1 for interrupt handlers.
	(sh_pch_valid_p): Use a copy of TARGET_OPTIONS.
	(general_movsrc_operand): Accept vector that match sh_rep_vec.
	(general_movdst_operand): For SHmedia, recject paradoxical DImode
	subregs before high_life / reload.
	(arith_reg_operand): Allow no-op sign extensions.
	(logical_reg_operand, fp_arith_reg_dest, xor_operand): New functions.
	(cmp_operand, shift_operator, logical_operator): Likewise.
	(minuend_operand, ua_address_operand, cache_address_operand): Likewise.
	(ua_offset, shift_count_reg_operand, shift_count_operand): Likewise.
	(sh_adjust_unroll_max, replace_n_hard_rtx, sh_gen_truncate): Likewise.
	(shmedia_cleanup_truncate, sh_contains_memref_p_1): Likewise.
	(sh_contains_memref_p): Likewise.
	(shmedia_6bit_operand): Remove.
	(arith_operand): Allow some TRUNCATEs.
	(logical_operand): Disallow subregs <= SImode of >= DImode.
	(greater_comparison_operator): Fix mode comparison.
	(less_comparison_operator): Likewise.
	(target_reg_operand, target_operand): Compare modes with Pmode.
	(sh_adjust_cost): Consider the dependency between a target register
	load and its use in a subsequent block.
	Implement mac_media latency exception.
	Before reload, anticipate floating point latencies to be at least four.
	Give preference to the ptabs feeding a casesi_jump_media.
	Handle UNSPEC in a CALL address.
	(sh_optimize_target_register_callee_saved): Improve handling of
	borderline cases.
	(sh_function_ok_for_sibcall): Allow for non-pic, and also when we
	will use the symbol with @GOTOFF addressing.
	(SH_BLTIN_UDI): Remove.
	(SH_BLTIN_LDUA_L64, SH_BLTIN_LDUA_Q64, SH_BLTIN_STUA_L64): New.
	(SH_BLTIN_STUA_Q64): Likewise.
	(signature_args, SH_BLTIN_NUM_SHARED_SIGNATURES): Update.
	(SH_BLTIN_2, SH_BLTIN_SU, SH_BLTIN_3, SH_BLTIN_SUS): Renumber.
	(SH_BLTIN_PSSV, SH_BLTIN_XXUU, SH_BLTIN_UUUU, SH_BLTIN_PV): Likewise.
	(bdesc): Add entries for alloco, mac_media, sqrtdf2, sqrtsf2, fsrra_s,
	{ld,st}{hi,lo}.[lq] and prefetch.
	Change mextr entries to use SH_BLTIN_V8QI3.
	(sh_media_init_builtins): Implement specific TARGET_SHMEDIA32 /
	TARGET_SHMEDIA64 checks for pointer arguments.
	(sh_expand_builtin): For pointer types, use ptr_mode / ptr_type_mode.
	(sh_register_move_cost): Check sh_gettrcost_str.
	(cmpsi_operand): T_REG is only allowed for TARGET_SH1.
	(sh_output_mi_thunk): Make static.  Check that needed registers are
	actually available.  Make sure that the sibcall won't go via the PLT.
	(sh_multcost_str, sh_gettrcost_str, sh_div_str): New variables.
	(cut2_workaround_str, sh_div_strategy, boardtype, osruntime): Likewise.
	(arith_reg_dest): Allow paradoxical DImode subreg for ! TARGET_SHMEDIA.
	* sh.h (TARGET_CPU_CPP_BUILTINS): Define __SH_FPU_ANY__ and
	__SH_FPU_DOUBLE__.
	(INDEXED_ADDRESS_BIT, ADJUST_UNROLL_BIT, TARGET_DIVIDE_INV): Define.
	(TARGET_HARVARD): Also true for TARGET_SH5.
	(TARGET_DIVIDE_FP, TARGET_DIVIDE_INV_FP, TARGET_DIVIDE_CALL2): Define.
	(TARGET_DIVIDE_INV_MINLAT, TARGET_DIVIDE_INV20U): Define.
	(TARGET_DIVIDE_INV20L, TARGET_DIVIDE_INV_CALL): Define.
	(TARGET_DIVIDE_INV_CALL2, TARGET_ALLOW_INDEXED_ADDRESS): Define.
	(TARGET_ADJUST_UNROLL, TARGET_OPT_DEFAULT, SUBTARGET_OPTIONS): Define.
	(TARGET_SWITCHES): Removed excessive whitespace.  Added options
	indexed-addressing, no-indexed-addressing, adjust-unroll and
	no-adjust-unroll.
	(TARGET_DEFAULT): Add TARGET_OPT_DEFAULT.
	(TARGET_OPTIONS): Define.
	(EXTRA_SPECS): Add subtarget_asm_spec.
	(SH_ASM_SPEC): Pass cut2-workaround option.
	(SUBTARGET_ASM_ISA_SPEC): Enforce STRICT_NOFPU for SH4 --without-fp.
	(LINK_EMUL_PREFIX): If target defaults to little endian, default to shl.
	(OPTIMIZATION_OPTIONS): Set sh_div_str.  If not using if not -mieee,
	set flag_finite_math_only.
	(sh_divide_strategy_e): New enum.
	(sh_div_strategy): Declare.
	(OVERRIDE_OPTIONS): Don't set FMOVD_BIT for TARGET_SHCOMPACT.
	Clear flag_if_conversion2 for SHMEDIA.
	Set sh_div_strategy.
	Leave profile_flag and profile_arc_flag alone.
	(LOOP_ALIGN): Replace TARGET_HARVARD test with TARGET_HARD_SH4 test.
	(HARD_REGNO_MODE_OK): Allow TImode in aligned FP registers.
	(MODES_TIEABLE_P): For TARGET_SHMEDIA, allow tying of integral modes
	of the same size.
	(CONST_OK_FOR_I): Fix detection of I06 constraint.
	(PREFERRED_RELOAD_CLASS): Also choose GENERAL_REGS for
	PIC_DIRECT_ADDR_P.
	(SECONDARY_INPUT_RELOAD_CLASS): Fix parentheses.  For TARGET_SHMEDIA,
	check for inqhi_operand, LABEL_REF and PIC_DIRECT_ADDR_P.
	(FUNCTION_VALUE, PROMOTE_MODE): Don't promote from SImode.  For
	TARGET_SHMEDIA32, promote to SImode.
	(EXTRA_CONSTRAINT_C16): Allow SIGN_EXTEND to SImode.
	(DATALABEL_REF_NO_CONST_P: Don't allow SYMBOL_REF.
	(DATALABEL_REF_P): Don't define.
	(NON_PIC_REFERENCE_P): Allow LABEL_REF and SYMBOL_REF directly inside
	a CONST.  Don't allow DATALABEL_REF_NO_CONST_P outside of a CONST.
	Allow a LABEL_REF in a sum.
	(BASE_REGISTER_RTX_P): Check TRULY_NOOP_TRUNCATION.
	(INDEX_REGISTER_RTX_P): Likewise.
	(GO_IF_LEGITIMATE_INDEX): Check if pased the address of an unaligned
	load / store.
	(ALLOW_INDEXED_ADDRESS): Define.
	(GO_IF_LEGITIMATE_ADDRESS): Use it.
	(TRULY_NOOP_TRUNCATION): Don't allow no-op truncation from 64 bit or
	beyond to less than 64 bit.
	(PRINT_OPERAND_PUNCT_VALID_P): Allow '>'.
	(rtx_equal_function_value_matters): Don't declare.
	(arith_reg_operand): Allow sign_extend.
	(PREDICATE_CODES): Allow SIGN_EXTEND in arith_reg_operand.  Add
	any_arith_reg_dest, cache_address_operand, cmp_operand,
	fp_arith_reg_dest, logical_operator, logical_reg_operand,
	minuend_operand, shift_count_operand, shift_count_reg_operand,
	shift_operator, ua_address_operand, ua_offset, unary_float_operator,
	xor_operand.  Don't allow PARALLEL in sh_1el_vec and sh_rep_vec
	Remove shmedia_6bit_operand.
	(SPECIAL_MODE_PREDICATES): Add any-arith_reg_dest, target_operand
	and target_reg_operand.
	(SIDI_OFF, SIMULTANEOUS_PREFETCHES, high_life_started): Define.
	(sh_multcost_str, sh_gettrcost_str, sh_div_str): Declare.
	(cut2_workaround_str): Declare.
	(INDEX_REG_CLASS): Is NO_REGS if ALLOW_INDEXED_ADDRESS is zero.
	(LEGITIMIZE_RELOAD_ADDRESS): Check ALLOW_INDEXED_ADDRESS.
	Substitute INDEX_REG_CLASS with R0_REGS.
	* sh.md (UNSPEC_DIV_INV_M0, UNSPEC_DIV_INV_M1): New constants.
	(UNSPEC_DIV_INV_M2, UNSPEC_DIV_INV_M3, UNSPEC_DIV_INV20): Likewise.
	(UNSPEC_ASHIFTRT, UNSPEC_THUNK): Likewise.
	(Attribute "length"): jump_media has length 8 if
	TARGET_SH5_CUT2_WORKAROUND is true.
	("highpart"): New attribute.
	(cmpsi): Allow TARGET_SHMEDIA.
	(cmpeqsi_media, cmpgtsi_media, cmpgtusi_media): New patterns.
	(cmpsieqsi_media, cmpsieqdi_media, cmpsigtsi_media): Likewise.
	(cmpsigtdi_media, cmpsigtusi_media, cmpsigtudi_media): Likewise.
	(*cmpne0si_media, *cmpne0sisi_media, movdicc_true+1): Likewise.
	(movdicc_true+2, movsicc_false, movsicc_true): Likewise.
	(movsicc_true+1, movsicc_true+2, movsicc_true+3): Likewise.
	(*movsicc_umin, movsicc, movqicc, *adddisi3_media): Likewise.
	(addsidi3_media, subdisi3_media, mov_neg_si_t): Likewise.
	(*subsi3_media+1, *subsi3_media+2, divsi3_media_2): Likewise.
	(divsi_inv_call, *divsi_inv_call_combine, divsi_inv_m0): Likewise.
	(divsi_inv_m1, divsi_inv_m2, divsi_inv_m3, divsi_inv_m1_3): Likewise.
	(divsi_inv20, divsi_inv_fp, *divsi_inv_fp_combine, muldi3): Likewise.
	(*andsi3_media, andcsi3): Likewise.
	(cmpeqdi_media): Use cmp_operand operand predicate.
	(*adddi3_media, adddi3z_media): Use arith_reg_dest operand predicate.
	(adddi3_compact, adddi3_compact+1, addc, addc1): Likewise.
	(addsi3_media, *addsi3_compact, *subdi3_media): Likewise.
	(subdi3_compact, subdi3_compact+1, subc, subc1): Likewise.
	(*subsi3_internal, *subsi3_media, udivsi3_sh2a, divsi3_sh2a): Likewise.
	(mul_r, mulsidi3_media, mulsidi3_compact): Likewise.
	(mulsidi3_compact+1, umulsidi3_media, umulsidi3_compact): Likewise.
	(umulsidi3_compact+1, *andsi3_compact, anddi3, andcdi3): Likewise.
	(*subsi3_media): Make define_insn_and_split.  Use minuend_operand
	operand predicate.
	(subsi3): Don't force operand 1 into a register if it is a SUBREG.
	(udivsi3_i1_media, udivsi3): Use Pmode for function/target address.
	(divsi3_i1_media, beq_media, *beq_media_i, bne_media): Likewise.
	(bgt_media, bge_media, bgtu_media, bgeu_media, *bgt_media_i): Likewise.
	(*blt_media_i, bunordered, jump_media, jump, call_media): Likewise.
	(call_value_media, call, call_value, sibcall_media, sibcall): Likewise.
	(indirect_jump, casesi_jump_media, GOTaddr2picreg, *ptb): Likewise.
	(symGOT_load, casesi, casesi_shift_media, casesi_load_media): Likewise.
	(return_media_i, return_media): Likewise.
	(udivsi3_i1_media): Enable also for ! TARGET_DIVIDE_FP.
	(divsi3_i1_media): Likewise.  Don't clobber R2 / R3 / TR1 / TR2.
	(divsi3): Add support for division by multiplying with inverse.
	(andsi3): Use logical_reg_operand predicate.  Add SHmedia support.
	(iorsi3): Rename to:
	(*iorsi3_compact).
	(xorsi3): Rename to:
	(*xorsi3_compact).
	(iorsi3, *iorsi3_media, *logical_sidi3, xorsi3): New patterns.
	(*logical_sidisi3, *logical_sidi3_2, rotrdi3_mextr+1): Likewise.
	(ashrsi2_31+2, *ashlsi_c_void, *ashldisi3_media): Likewise.
	(*lshrdisi3_media, *ashrdisi3_media, ashrdisi3_media_high): Likewise.
	(ashrdisi3_media_opaque, one_cmpldi2+1, cneg, movsi_const): Likewise.
	(movsi_const_16bit, *movdi_media_I16, *shori_media_si): Likewise.
	(*beq_media_i32, *bgt_media_i32, *blt_media_i32): Likewise.
	(bunordered+1, sibcalli_thunk, ptrel_si, cmpsieqsf_media): Likewise.
	(cmpsieqdf_media, addv2hi3, ashlv2si3+1, subv2hi3, ldhi_l): Likewise.
	(ldhi_q, *ldhi_q_comb0, *ldhi_q_comb1, ldlo_l, ldlo_q): Likewise.
	(*ldlo_q_comb0, *ldlo_q_comb1, sthi_l, sthi_q): Likewise.
	(*sthi_q_comb0, *sthi_q_comb1, stlo_l, stlo_q): Likewise.
	(*stlo_q_comb0, *stlo_q_comb1, ldhi_l64, ldhi_q64, ldlo_l64): Likewise.
	(ldlo_q64, sthi_l64, sthi_q64, stlo_l64, stlo_q64, alloco_i): Likewise.
	(alloca_i+1): Likewise.
	(prefetch_media): Inhibit generator function generation.
	(prefetch_i4): Likewise.  Also enable for TARGET_SHCOMPACT.
	(*iorsi3_compact, iordi3): Use arith_reg_dest operand predicate.
	(*xorsi3_compact, xordi3, xordi3+1, rotlsi3_1, rotlsi3_31): Likewise.
	(rotlsi3_16, rotlsi3, *rotlhi3_8, ashlsi3_sh2a, ashlsi3_std): Likewise.
	(ashlhi3_k, ashlsi3_n, ashlsi3_n+1, ashlsi3_media): Likewise.
	(*ashlhi3_n, ashlhi3+1, ashrsi3_sh2a, ashrsi3_k, ashrsi2_16): Likewise.
	(ashrsi2_16+1, ashrsi2_31, ashrsi2_31+1, ashlsi_c): Likewise.
	(ashrsi3_d, ashrsi3_media, lshrsi3_sh2a, lshrsi3_d): Likewise.
	(lshrsi3_m, lshrsi3_k, lshrsi3_n, lshrsi3_n, lshrsi3_media): Likewise.
	(lshrsi3, ashldi3_k, ashldi3_mediai, lshrdi3_k): Likewise.
	(ashrdi3_k, xtrct_left, xtrct_right, negc, *negdi_media): Likewise.
	(negsi2, one_cmplsi2, one_cmpldi2, zero_extendsidi2): Likewise.
	(*zero_extendhisi2_compact, *zero_extendqisi2_compact): Likewise.
	(zero_extendqihi2, extendhisi2, *extendhisi2_compact): Likewise.
	(extendqisi2, *extendqisi2_compact, extendqihi2): Likewise.
	(movsi_const_16bit+1, *movdi_media_I16+1): Likewise.
	(movdf_media_nofpu+1, movsf_media_nofpu+1, dect, movt, seq): Likewise.
	(movnegt+1, divsf3_i): Likewise.
	(xordi3): Use xor_operand operand predicate.
	(ashlsi3_media): Use shift_count_operand operand predicate.
	(ashrsi3_media, lshrsi3_media, ashldi3_media, lshrdi3_media): Likewise.
	(ashrdi3_media): Likewise.
	(ashrsi2_31+1): Use mov_neg_si_t.
	(lshrdi3_media, ashrdi3_media): Use ext_dest_operand predicate.
	Make sure that either the destination is not a subreg, or that the
	shift generates a sufficient number of sign bit copies.
	(*loaddi_trunc): Use any_register_operand predicate.
	(ic_invalidate_line_sh4a): Likewise.
	(*zero_extendhisi2_media+1): Use simplify_gen_subreg.
	(*extendhisi2_media+1i, *extendqisi2_media+1): Likewise.
	(extendsidi2): Add fmov.sl alternative.
	(load_ra): Add mode for operand 1.
	(*movsi_media): Discourage the use of floating point registers.
	Allow TRUNCATE.
	(*movsi_media_nofpu): Ignore target register alternative for register
	preferencing.  Allow TRUNCATE.
	(movsi_const_16bit+1): Use gen_movsi_const, and add an REG_EQUAL note.
	(*movqi_media): Use extend_reg_or_0_operand predicate.
	(*movdi_media): Ignore target register alternative for register
	preferencing.  Discourage the use of floating point registers.
	(*movdi_media_nofpu): Ignore target register alternative for register
	preferencing.
	(movdi_const_16bit+1): If the source is subregged from SImode,
	sign-extend highpart.  Use ext_dest_operand predicate.
	(movdi_const_16bit+2, shori_media): Use ext_dest_operand predicate.
	(reload_outdf+7, reload_outdf+8): Check ALLOW_INDEXED_ADDRESS.
	(stuff_delay_slot): Add modes for operands 0 and 1.
	(*beq_media_i, *bgt_media_i): Add '>' to output templates.
	(*blt_media_i, jump_media): Likewise.
	(beq, bne): Pass through SImode inputs, and I06 constants.
	(bgt, blt, ble, bge, bgtu): Pass through SImode inputs, the constant 0.
	(bltu, bgeu, bleu): Likewise.
	(GOTaddr2picreg): Don't call gen_datalabel_ref.
	(ptrel): Rename to:
	(ptrel_di).
	(tls_global_dynamic, tls_local_dynamic): Add mode for call.
	(seq): Properly support input modes other than DImode.
	(slt, sle, sgt, sge,sne): Properly support SImode.
	(addsf3_i, negdf2_i, sqrtdf2_i, absdf2_i): Use fp_arith_reg_operand.
	(mac_media) Enable generator function generation.
	(fix_truncsfdi2): Use fp_arith_reg_dest operand predicate.
	(fix_truncdfdi2): Likewise.
	(movv8qi_i+3): Enable for CONST0_RTX too.
	(movv2hi_i): Use add.l, not addz.l.
	(ashlv2si3, ashlv4hi3, lshrv2si3): Use shift_count_reg_operand.
	(lshrv4hi3): Likewise.
	(ussubv8qi3): Allow zero for operand 1.
	(prefetch): Allow any mode for operand 0.  Enable for SHCOMPACT.
	Use force_reg.
	* config/sh/shmedia.md: (shmedia): Remove automaton declaration.
	(sh5inst_pipe, sh5fpu_pipe): New automatons.
	(sh5issue): Use sh5inst_pipe.
	(sh5fds): Use sh5fpu_pipe.
	(shmedia_fdiv, shmedia_dfdiv): Also use sh5issue.
	* config/sh/sshmedia.h (sh_media_GETCON, sh_media_PUTCON): Declare
	with always_inline Attribute.
	* t-sh64 (LIB1ASMFUNCS): Add _div_table.
	* config/sh/ushmedia.h (sh_media_MABS_L): Use builtin function.
	(sh_media_MABS_W, sh_media_MADD_L, sh_media_MADD_W): Likewise.
	(sh_media_MADDS_L, sh_media_MADDS_UB, sh_media_MADDS_W): Likewise.
	(sh_media_MCMPEQ_B, sh_media_MCMPEQ_L, sh_media_MCMPEQ_W): Likewise.
	(sh_media_MCMPGT_UB, sh_media_MCMPGT_L, sh_media_MCMPGT_W): Likewise.
	(sh_media_MCMV, sh_media_MCNVS_LW, sh_media_MCNVS_WB): Likewise.
	(sh_media_MCNVS_WUB, sh_media_MEXTR1, sh_media_MEXTR2): Likewise.
	(sh_media_MEXTR3, sh_media_MEXTR4, sh_media_MEXTR5): Likewise.
	(sh_media_MEXTR6, sh_media_MEXTR7, sh_media_MMACFX_WL): Likewise.
	(sh_media_MMACNFX_WL, sh_media_MMUL_L, sh_media_MMUL_W): Likewise.
	(sh_media_MMULFX_L, sh_media_MMULFX_W, sh_media_MMULFXRP_W): Likewise.
	(sh_media_MMULHI_WL, sh_media_MMULLO_WL): Likewise.
	(sh_media_MMULSUM_WQ, sh_media_MPERM_W, sh_media_MSAD_UBQ): Likewise.
	(sh_media_MSHALDS_L, sh_media_MSHALDS_W, sh_media_MSHARD_L): Likewise.
	(sh_media_MSHARD_W, sh_media_MSHARDS_Q, sh_media_MSHFHI_B): Likewise.
	(sh_media_MSHFHI_L, sh_media_MSHFHI_W, sh_media_MSHFLO_B): Likewise.
	(sh_media_MSHFLO_L, sh_media_MSHFLO_W, sh_media_MSHLLD_L): Likewise.
	(sh_media_MSHLLD_W, sh_media_MSHLRD_L, sh_media_MSHLRD_W): Likewise.
	(sh_media_MSUB_L, sh_media_MSUB_W, sh_media_MSUBS_L): Likewise.
	(sh_media_MSUBS_UB, sh_media_MSUBS_W, sh_media_FABS_D): Likewise.
	(sh_media_FABS_S, sh_media_FCMPUN_D, sh_media_FCMPUN_S): Likewise.
	(sh_media_FIPR_S, sh_media_FMAC_S, sh_media_FSQRT_D): Likewise.
	(sh_media_FSQRT_S, sh_media_FTRV_S, sh_media_LDHI_L): Likewise.
	(sh_media_LDHI_Q, sh_media_LDLO_L, sh_media_LDLO_Q): Likewise.
	(sh_media_STHI_L, sh_media_STHI_Q, sh_media_STLO_L): Likewise.
	(sh_media_STLO_Q, sh_media_NSB, sh_media_BYTEREV): Likewise.
	(sh_media_PREFO, sh_media_ALLOCO): Likewise.
	(sh_media_FCOSA_S, sh_media_FSINA_S): New function.
	(sh_media_FMOV_DQ, sh_media_FMOV_LS): Use union assignment.
	(sh_media_FMOV_QD, sh_media_FMOV_SL): Likewise.
	(sh_media_CMVEQ): Use C code. Add attribute always_inline.
	(sh_media_CMVNE): Likewise.
	(sh_media_ADDZ_L): Use C code.
	(sh_media_unaligned_LD_L): Use intrinsics directly.
	(sh_media_unaligned_LD_Q, sh_media_unaligned_ST_L): Likewise.
	(sh_media_unaligned_ST_Q): Likewise.
	* config/sh/divtab.c: New file.
	
	2005-04-06  Andrew Stubbs <andrew.stubbs@superh.com>
	J"orn Rennecke <joern.rennecke@superh.com>
	
	* config/sh/superh64.h, config/sh/superh.h: New files.
	* config/sh/newlib.h, config/sh/t-superh: Likewise.
	* config.gcc: Add support for sh*-superh-elf* and sh64-superh-linux*.
	
	2005-04-06  J"orn Rennecke <joern.rennecke@st.com>
	Richard Shann <rshann@superh.com>
	
	PR middle-end/20396:
	* loop.c (combine_movables): Take TRULY_NOOP_TRUNCATION into account.
	* optabs.c (expand_binop): Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/divtab.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/newlib.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/superh.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/superh64.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/t-superh.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/crt1.asm.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.9&r2=1.9.42.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/elf.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.37&r2=1.37.26.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/lib1funcs.asm.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.40&r2=1.40.40.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/libgcc-excl.ver.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.1&r2=1.1.30.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/linux.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.28&r2=1.28.4.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/sh-protos.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.60&r2=1.60.36.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/sh.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.319&r2=1.319.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/sh.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.262&r2=1.262.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/sh.md.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.191&r2=1.191.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/shmedia.md.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.1&r2=1.1.56.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/sshmedia.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.2&r2=1.2.80.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/t-sh64.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.8&r2=1.8.38.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/sh/ushmedia.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.4&r2=1.4.26.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-04-08 18:23 -------
Patch is here: http://gcc.gnu.org/ml/gcc-patches/2005-04/msg00883.html

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-04-08 18:28 -------
Subject: Bug 20396

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	sh-elf-4_1-branch
Changes by:	amylaar@gcc.gnu.org	2005-04-08 18:28:02

Modified files:
	gcc            : ChangeLog basic-block.h bt-load.c config.gcc 
	                 flow.c integrate.c loop.c optabs.c 

Log message:
	2005-04-06  J"orn Rennecke <joern.rennecke@st.com>
	
	PR middle-end/20793:
	* integrate.c (allocate_initial_values): Update register liveness
	information.
	
	PR rtl-optimization/20769:
	* bt-load.c (compute_defs_uses_and_gen): Check for the blockage
	pattern emitted by expand_nl_goto_receiver.
	
	PR rtl-optimization/20756:
	* basic-block.h (PROP_DEAD_INSN): Define.
	* flow.c (propagate_one_insn): Set during mark_set_regs call
	for a dead insn.
	
	PR middle-end/20714
	* optabs.c (no_conflict_data): New struct.
	(no_conflict_move_test): New function.
	(emit_no_conflict_block): Use it.
	
	Workaround for PR rtl-optimization/20413:
	* sh.md (blt_media_i32, blt_media_i32+1): New splitters.
	
	Merge of SuperH / STM SH specific patches, including fix for
	PR target/20695:
	* config.gcc (sh*-superh-elf, sh*elf (newlib)): Use newlib.h
	when building with libgloss.
	(sh*elf): Implement --without-fp option.
	(sh64-superh-linux*): Don't multilib.
	(sh*-*-linux): Use sh3 as basic multilib.
	[config/sh/* changes elided]
	
	2005-04-06  Andrew Stubbs <andrew.stubbs@superh.com>
	J"orn Rennecke <joern.rennecke@superh.com>
	
	* config/sh/superh64.h, config/sh/superh.h: New files.
	* config/sh/newlib.h, config/sh/t-superh: Likewise.
	* config.gcc: Add support for sh*-superh-elf* and sh64-superh-linux*.
	
	2005-04-06  J"orn Rennecke <joern.rennecke@st.com>
	Richard Shann <rshann@superh.com>
	
	PR middle-end/20396:
	* loop.c (combine_movables): Take TRULY_NOOP_TRUNCATION into account.
	* optabs.c (expand_binop): Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=2.8142&r2=2.8142.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/basic-block.h.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.246&r2=1.246.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/bt-load.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=2.32&r2=2.32.10.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config.gcc.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.530&r2=1.530.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.623&r2=1.623.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/integrate.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.273&r2=1.273.20.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.525&r2=1.525.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/optabs.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.268&r2=1.268.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[echristo at redhat dot com]

------- Additional Comments From echristo at redhat dot com  2005-04-10 19:02 -------
I think I'm ok with this, but I'd like a bit more info. What changes to the
backend do you forsee this needing? The one patch that you applied to the 4.1 sh
branch was too big to just get that particular set of changes.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[joern dot rennecke at st dot com]

------- Additional Comments From joern dot rennecke at st dot com  2005-04-11 12:36 -------
Subject: Re:  TRULY_NOOP_TRUNCATION ignored

echristo at redhat dot com wrote:

>------- Additional Comments From echristo at redhat dot com  2005-04-10 19:02 -------
>I think I'm ok with this, but I'd like a bit more info. What changes to the
>backend do you forsee this needing? The one patch that you applied to the 4.1 sh
>branch was too big to just get that particular set of changes.
>
>  
>
[assuming you are talking about generating TRUNCATE in gen_lowpart_common]

First. some source operands will have a TRUNCATE, and if your expander 
tries to make
all operands fit, or thinks it knows all the codes that can occur in 
some position, it will have
to be updated to cope with the TRUNCATE.
This is unfortunately also true for destination operands.  Also, when 
you use gen_lowpart
for a non-TRULY_NOOP_TRUNCATION mode pair, in a splitter or a peephole, 
for a
destination, or for an operand where due to the nature of the operation 
or the register class
being used a SUBREG is desired, you will still get a TRUNCATE; you have 
to use
simplyfy_gen_subreg to explicitly get a SUBREG.
The splitter with the for_each_rtx application of 
shmedia_cleanup_truncate cleans up such
stuff after reload.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[echristo at redhat dot com]

------- Additional Comments From echristo at redhat dot com  2005-04-11 19:54 -------
OK. I'm willing to fix up the mips backend for this if you hand me the patch
ahead of time (and it's accepted as a good idea by the middle-end maintainers).

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|17652                       |
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[amylaar at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |20695
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-12 13:40 -------
Subject: Bug 20396

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	sh-elf-4_1-branch
Changes by:	amylaar@gcc.gnu.org	2005-07-12 13:40:25

Modified files:
	gcc            : ChangeLog 

Log message:
	Add patchg URL for PR middle-end/20396.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=2.8142.2.18&r2=2.8142.2.19



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-31 02:38 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |04/msg00883.html
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-07-31 02:38:26
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-16 11:57 -------
Subject: Bug 20396

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	amylaar@gcc.gnu.org	2005-08-16 11:57:08

Modified files:
	gcc            : ChangeLog optabs.c 

Log message:
	2005-08-16  J"orn Rennecke <joern.rennecke@st.com>
	Richard Shann <rshann@superh.com>
	
	PR middle-end/20396:
	* optabs.c (expand_binop): Take TRULY_NOOP_TRUNCATION into account.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9742&r2=2.9743
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/optabs.c.diff?cvsroot=gcc&r1=1.288&r2=1.289



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396

[Bug middle-end/20396] TRULY_NOOP_TRUNCATION ignored

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-16 12:09 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20396