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04e006ab36
When allocating new temps during tcg_optmize, do not re-use
any EBB temps that were used within the TB. We do not have
any idea what span of the TB in which the temp was live.
Introduce tcg_temp_ebb_reset_freed and use before tcg_optimize,
as well as replacing the equivalent in plugin_gen_inject and
tcg_func_start.
Cc: qemu-stable@nongnu.org
Fixes: fb04ab7ddd ("tcg/optimize: Lower TCG_COND_TST{EQ,NE} if unsupported")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2711
Reported-by: wannacu <wannacu2049@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/*
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* TCG internals related to TCG temp allocation
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef TCG_TEMP_INTERNAL_H
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#define TCG_TEMP_INTERNAL_H
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/*
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* Allocation and freeing of EBB temps is reserved to TCG internals
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*/
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void tcg_temp_free_internal(TCGTemp *);
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void tcg_temp_free_i32(TCGv_i32 arg);
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void tcg_temp_free_i64(TCGv_i64 arg);
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void tcg_temp_free_i128(TCGv_i128 arg);
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void tcg_temp_free_ptr(TCGv_ptr arg);
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void tcg_temp_free_vec(TCGv_vec arg);
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TCGv_i32 tcg_temp_ebb_new_i32(void);
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TCGv_i64 tcg_temp_ebb_new_i64(void);
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TCGv_ptr tcg_temp_ebb_new_ptr(void);
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TCGv_i128 tcg_temp_ebb_new_i128(void);
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/* Forget all freed EBB temps, so that new allocations produce new temps. */
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static inline void tcg_temp_ebb_reset_freed(TCGContext *s)
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{
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memset(s->free_temps, 0, sizeof(s->free_temps));
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}
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#endif /* TCG_TEMP_FREE_H */
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