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tcg: Move temp_idx and tcgv_i32_temp debug out of line 

Removes a multiplicity of calls to __assert_fail, saving up
to 360kiB of .text space as measured on an x86_64 host.

Old     New     Less    %Change
9257272	8888680	368592	3.98%	qemu-system-aarch64
6100968	5911832	189136	3.10%	qemu-system-riscv64
5839112	5707032	132080	2.26%	qemu-system-mips
4447608	4341752	105856	2.38%	qemu-system-s390x

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-03-30 08:09:03 -07:00
parent d53106c997
commit 177f648f0e
2 changed files with 35 additions and 14 deletions
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30
include/tcg/tcg.h
View File

@ -630,13 +630,6 @@ static inline void *tcg_splitwx_to_rw(const void *rx)
} }
#endif #endif
static inline size_t temp_idx(TCGTemp *ts)
{
ptrdiff_t n = ts - tcg_ctx->temps;
tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps);
return n;
}
static inline TCGArg temp_arg(TCGTemp *ts) static inline TCGArg temp_arg(TCGTemp *ts)
{ {
return (uintptr_t)ts; return (uintptr_t)ts;
@ -647,16 +640,25 @@ static inline TCGTemp *arg_temp(TCGArg a)
return (TCGTemp *)(uintptr_t)a; return (TCGTemp *)(uintptr_t)a;
} }
/* Using the offset of a temporary, relative to TCGContext, rather than #ifdef CONFIG_DEBUG_TCG
its index means that we don't use 0. That leaves offset 0 free for size_t temp_idx(TCGTemp *ts);
a NULL representation without having to leave index 0 unused. */ TCGTemp *tcgv_i32_temp(TCGv_i32 v);
#else
static inline size_t temp_idx(TCGTemp *ts)
{
return ts - tcg_ctx->temps;
}
/*
* Using the offset of a temporary, relative to TCGContext, rather than
* its index means that we don't use 0. That leaves offset 0 free for
* a NULL representation without having to leave index 0 unused.
*/
static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v) static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v)
{ {
uintptr_t o = (uintptr_t)v; return (void *)tcg_ctx + (uintptr_t)v;
TCGTemp *t = (void *)tcg_ctx + o;
tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(t)]) == o);
return t;
} }
#endif
static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v) static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v)
{ {

19
tcg/tcg.c
View File

@ -1800,6 +1800,25 @@ TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val)
return tcg_constant_vec(t->base_type, vece, val); return tcg_constant_vec(t->base_type, vece, val);
} }
#ifdef CONFIG_DEBUG_TCG
size_t temp_idx(TCGTemp *ts)
{
ptrdiff_t n = ts - tcg_ctx->temps;
assert(n >= 0 && n < tcg_ctx->nb_temps);
return n;
}
TCGTemp *tcgv_i32_temp(TCGv_i32 v)
{
uintptr_t o = (uintptr_t)v - offsetof(TCGContext, temps);
assert(o < sizeof(TCGTemp) * tcg_ctx->nb_temps);
assert(o % sizeof(TCGTemp) == 0);
return (void *)tcg_ctx + (uintptr_t)v;
}
#endif /* CONFIG_DEBUG_TCG */
/* Return true if OP may appear in the opcode stream. /* Return true if OP may appear in the opcode stream.
Test the runtime variable that controls each opcode. */ Test the runtime variable that controls each opcode. */
bool tcg_op_supported(TCGOpcode op) bool tcg_op_supported(TCGOpcode op)