[Qemu-devel] [PATCH 07/11] cris: avoid write only variables

[Blue Swirl]

Compiling with GCC 4.6.0 20100925 produced warnings:
/src/qemu/target-cris/op_helper.c: In function 'helper_movl_sreg_reg':
/src/qemu/target-cris/op_helper.c:145:8: error: variable 'tlb_v' set
but not used [-Werror=unused-but-set-variable]
In file included from /src/qemu/target-cris/translate.c:3154:0:
/src/qemu/target-cris/translate_v10.c: In function 'dec10_prep_move_m':
/src/qemu/target-cris/translate_v10.c:111:22: error: variable 'rd' set
but not used [-Werror=unused-but-set-variable]

Fix by making the variable declarations and their uses also conditional
to debug definition, delete rd.

Signed-off-by: Blue Swirl <blauwir...@gmail.com>
---
 target-cris/op_helper.c     |    6 ++++++
 target-cris/translate_v10.c |    5 ++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/target-cris/op_helper.c b/target-cris/op_helper.c
index a60da94..28c79b1 100644
--- a/target-cris/op_helper.c
+++ b/target-cris/op_helper.c
@@ -142,7 +142,9 @@ void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
                        uint32_t idx;
                        uint32_t lo, hi;
                        uint32_t vaddr;
+#ifdef CRIS_OP_HELPER_DEBUG
                        int tlb_v;
+#endif

                        idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
                        set >>= 4;
@@ -157,13 +159,17 @@ void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
                        vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
                                              13, 31);
                        vaddr <<= TARGET_PAGE_BITS;
+#ifdef CRIS_OP_HELPER_DEBUG
                        tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
                                            3, 3);
+#endif
                        env->tlbsets[srs - 1][set][idx].lo = lo;
                        env->tlbsets[srs - 1][set][idx].hi = hi;

+#ifdef CRIS_OP_HELPER_DEBUG
                        D_LOG("tlb flush vaddr=%x v=%d pc=%x\n",
                                  vaddr, tlb_v, env->pc);
+#endif
                        tlb_flush_page(env, vaddr);
                }
        }
diff --git a/target-cris/translate_v10.c b/target-cris/translate_v10.c
index 14e590d..6944827 100644
--- a/target-cris/translate_v10.c
+++ b/target-cris/translate_v10.c
@@ -108,16 +108,15 @@ static unsigned int
crisv10_post_memaddr(DisasContext *dc, unsigned int size)
 static int dec10_prep_move_m(DisasContext *dc, int s_ext, int memsize,
                            TCGv dst)
 {
-    unsigned int rs, rd;
+    unsigned int rs;
     uint32_t imm;
     int is_imm;
     int insn_len = 0;

     rs = dc->src;
-    rd = dc->dst;
     is_imm = rs == 15 && !(dc->tb_flags & PFIX_FLAG);
     LOG_DIS("rs=%d rd=%d is_imm=%d mode=%d pfix=%d\n",
-             rs, rd, is_imm, dc->mode, dc->tb_flags & PFIX_FLAG);
+             rs, dc->dst, is_imm, dc->mode, dc->tb_flags & PFIX_FLAG);

     /* Load [$rs] onto T1.  */
     if (is_imm) {
-- 
1.6.2.4