From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44300) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e5gan-0005rN-3U for qemu-devel@nongnu.org; Fri, 20 Oct 2017 19:20:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e5gaj-0007YB-3X for qemu-devel@nongnu.org; Fri, 20 Oct 2017 19:20:41 -0400 Received: from mail-pf0-x243.google.com ([2607:f8b0:400e:c00::243]:54400) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e5gai-0007Xv-U7 for qemu-devel@nongnu.org; Fri, 20 Oct 2017 19:20:37 -0400 Received: by mail-pf0-x243.google.com with SMTP id n89so13055357pfk.11 for ; Fri, 20 Oct 2017 16:20:36 -0700 (PDT) From: Richard Henderson Date: Fri, 20 Oct 2017 16:19:37 -0700 Message-Id: <20171020232023.15010-7-richard.henderson@linaro.org> In-Reply-To: <20171020232023.15010-1-richard.henderson@linaro.org> References: <20171020232023.15010-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH v7 06/52] tcg: Add temp_global bit to TCGTemp List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: cota@braap.org, f4bug@amsat.org, pbonzini@redhat.com, Richard Henderson From: Richard Henderson This avoids needing to test the index of a temp against nb_globals. Reviewed-by: Emilio G. Cota Signed-off-by: Richard Henderson --- tcg/tcg.h | 12 ++++++++---- tcg/optimize.c | 15 ++++++++------- tcg/tcg.c | 11 ++++++++--- 3 files changed, 24 insertions(+), 14 deletions(-) diff --git a/tcg/tcg.h b/tcg/tcg.h index f06187fd8e..fc4d1ed58b 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -579,10 +579,14 @@ typedef struct TCGTemp { unsigned int indirect_base:1; unsigned int mem_coherent:1; unsigned int mem_allocated:1; - unsigned int temp_local:1; /* If true, the temp is saved across - basic blocks. Otherwise, it is not - preserved across basic blocks. */ - unsigned int temp_allocated:1; /* never used for code gen */ + /* If true, the temp is saved across both basic blocks and + translation blocks. */ + unsigned int temp_global:1; + /* If true, the temp is saved across basic blocks but dead + at the end of translation blocks. If false, the temp is + dead at the end of basic blocks. */ + unsigned int temp_local:1; + unsigned int temp_allocated:1; tcg_target_long val; struct TCGTemp *mem_base; diff --git a/tcg/optimize.c b/tcg/optimize.c index d8c3a7ed56..55f9e83ce8 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -116,25 +116,26 @@ static TCGOpcode op_to_movi(TCGOpcode op) } } -static TCGArg find_better_copy(TCGContext *s, TCGArg temp) +static TCGArg find_better_copy(TCGContext *s, TCGArg arg) { + TCGTemp *ts = arg_temp(arg); TCGArg i; /* If this is already a global, we can't do better. */ - if (temp < s->nb_globals) { - return temp; + if (ts->temp_global) { + return arg; } /* Search for a global first. */ - for (i = temps[temp].next_copy ; i != temp ; i = temps[i].next_copy) { + for (i = temps[arg].next_copy ; i != arg; i = temps[i].next_copy) { if (i < s->nb_globals) { return i; } } /* If it is a temp, search for a temp local. */ - if (!arg_temp(temp)->temp_local) { - for (i = temps[temp].next_copy ; i != temp ; i = temps[i].next_copy) { + if (!ts->temp_local) { + for (i = temps[arg].next_copy ; i != arg; i = temps[i].next_copy) { if (s->temps[i].temp_local) { return i; } @@ -142,7 +143,7 @@ static TCGArg find_better_copy(TCGContext *s, TCGArg temp) } /* Failure to find a better representation, return the same temp. */ - return temp; + return arg; } static bool temps_are_copies(TCGArg arg1, TCGArg arg2) diff --git a/tcg/tcg.c b/tcg/tcg.c index 935f3da0a1..e2a5f3f4c2 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -489,9 +489,14 @@ static inline TCGTemp *tcg_temp_alloc(TCGContext *s) static inline TCGTemp *tcg_global_alloc(TCGContext *s) { + TCGTemp *ts; + tcg_debug_assert(s->nb_globals == s->nb_temps); s->nb_globals++; - return tcg_temp_alloc(s); + ts = tcg_temp_alloc(s); + ts->temp_global = 1; + + return ts; } static int tcg_global_reg_new_internal(TCGContext *s, TCGType type, @@ -1190,7 +1195,7 @@ static char *tcg_get_arg_str_ptr(TCGContext *s, char *buf, int buf_size, { int idx = temp_idx(s, ts); - if (idx < s->nb_globals) { + if (ts->temp_global) { pstrcpy(buf, buf_size, ts->name); } else if (ts->temp_local) { snprintf(buf, buf_size, "loc%d", idx - s->nb_globals); @@ -2128,7 +2133,7 @@ static void temp_free_or_dead(TCGContext *s, TCGTemp *ts, int free_or_dead) } ts->val_type = (free_or_dead < 0 || ts->temp_local - || temp_idx(s, ts) < s->nb_globals + || ts->temp_global ? TEMP_VAL_MEM : TEMP_VAL_DEAD); } -- 2.13.6