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target/arm: Avoid maybe-uninitialized warning with gcc 4.9
GCC version 4.9.4 isn't clever enough to figure out that all execution paths in disas_ldst() that use 'fn' will have initialized it first, and so it warns: /home/LiKaige/qemu/target/arm/translate-a64.c: In function ‘disas_ldst’: /home/LiKaige/qemu/target/arm/translate-a64.c:3392:5: error: ‘fn’ may be used uninitialized in this function [-Werror=maybe-uninitialized] fn(cpu_reg(s, rt), clean_addr, tcg_rs, get_mem_index(s), ^ /home/LiKaige/qemu/target/arm/translate-a64.c:3318:22: note: ‘fn’ was declared here AtomicThreeOpFn *fn; ^ Make it happy by initializing the variable to NULL. Backports commit 88a90e3de6ae99cbcfcc04c862c51f241fdf685f from qemu
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@ -3508,7 +3508,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
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bool r = extract32(insn, 22, 1);
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bool r = extract32(insn, 22, 1);
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bool a = extract32(insn, 23, 1);
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bool a = extract32(insn, 23, 1);
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TCGv_i64 tcg_rs, clean_addr;
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TCGv_i64 tcg_rs, clean_addr;
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AtomicThreeOpFn *fn;
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AtomicThreeOpFn *fn = NULL;
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if (is_vector || !dc_isar_feature(aa64_atomics, s)) {
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if (is_vector || !dc_isar_feature(aa64_atomics, s)) {
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unallocated_encoding(s);
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unallocated_encoding(s);
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