tcg: Rearrange ldst label tracking

Dispense with TCGBackendData, as it has never been used for more than
holding a single pointer.  Use a define in the cpu/tcg-target.h to
signal requirement for TCGLabelQemuLdst, so that we can drop the no-op
tcg-be-null.h stubs.  Rename tcg-be-ldst.h to tcg-ldst.inc.c.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 0 insertions, 97 deletions

diff --git a/tcg/tcg-be-ldst.h b/tcg/tcg-be-ldst.h
deleted file mode 100644
index 17777aec5a..0000000000
--- a/tcg/tcg-be-ldst.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * TCG Backend Data: load-store optimization only.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifdef CONFIG_SOFTMMU
-
-typedef struct TCGLabelQemuLdst {
-    bool is_ld;             /* qemu_ld: true, qemu_st: false */
-    TCGMemOpIdx oi;
-    TCGType type;           /* result type of a load */
-    TCGReg addrlo_reg;      /* reg index for low word of guest virtual addr */
-    TCGReg addrhi_reg;      /* reg index for high word of guest virtual addr */
-    TCGReg datalo_reg;      /* reg index for low word to be loaded or stored */
-    TCGReg datahi_reg;      /* reg index for high word to be loaded or stored */
-    tcg_insn_unit *raddr;   /* gen code addr of the next IR of qemu_ld/st IR */
-    tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */
-    struct TCGLabelQemuLdst *next;
-} TCGLabelQemuLdst;
-
-typedef struct TCGBackendData {
-    TCGLabelQemuLdst *labels;
-} TCGBackendData;
-
-
-/*
- * Initialize TB backend data at the beginning of the TB.
- */
-
-static inline void tcg_out_tb_init(TCGContext *s)
-{
-    s->be->labels = NULL;
-}
-
-/*
- * Generate TB finalization at the end of block
- */
-
-static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
-static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
-
-static bool tcg_out_tb_finalize(TCGContext *s)
-{
-    TCGLabelQemuLdst *lb;
-
-    /* qemu_ld/st slow paths */
-    for (lb = s->be->labels; lb != NULL; lb = lb->next) {
-        if (lb->is_ld) {
-            tcg_out_qemu_ld_slow_path(s, lb);
-        } else {
-            tcg_out_qemu_st_slow_path(s, lb);
-        }
-
-        /* Test for (pending) buffer overflow.  The assumption is that any
-           one operation beginning below the high water mark cannot overrun
-           the buffer completely.  Thus we can test for overflow after
-           generating code without having to check during generation.  */
-        if (unlikely((void *)s->code_ptr > s->code_gen_highwater)) {
-            return false;
-        }
-    }
-    return true;
-}
-
-/*
- * Allocate a new TCGLabelQemuLdst entry.
- */
-
-static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s)
-{
-    TCGBackendData *be = s->be;
-    TCGLabelQemuLdst *l = tcg_malloc(sizeof(*l));
-
-    l->next = be->labels;
-    be->labels = l;
-    return l;
-}
-#else
-#include "tcg-be-null.h"
-#endif /* CONFIG_SOFTMMU */