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tcg/wasm32: narrow fallback to aliased qemu_ld TBs

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This commit is contained in:
Evan Reichard
2026-07-23 20:49:17 -04:00
parent ec4c6cc95a
commit c1fc905cf2
1 changed files with 5 additions and 2 deletions
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tcg/wasm32/tcg-target.c.inc
+5 -2
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@@ -3392,6 +3392,10 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGOpcode opc, const TCGArg *args, bo
{
wasm_tb_had_load = true;
tcg_tci_out_qemu_ldst(s, opc, args);
// Aliased qemu_ld - The wasm32 wrapper corrupts vCPU TLB state when the load destination also holds the address.
if (args[0] == args[1]) {
wasm_tci_only_tb = true;
}
tcg_wasm_out_qemu_ld(s, args, is_64);
}
static void tcg_out_qemu_st(TCGContext *s, TCGOpcode opc, const TCGArg *args, bool is_64)
@@ -3399,8 +3403,7 @@ static void tcg_out_qemu_st(TCGContext *s, TCGOpcode opc, const TCGArg *args, bo
wasm_tb_had_store = true;
tcg_tci_out_qemu_ldst(s, opc, args);
tcg_wasm_out_qemu_st(s, args, is_64);
/* ponytail: Mixed Store TBs Stay TCI - Pure store TBs are safe, but a store+load/helper TB in uzlib corrupts the vCPU TLB arrays when compiled. */
bool store_tci = !wasm_store_tci_disabled && (wasm_tb_had_load || wasm_tb_had_helper);
bool store_tci = false;
if (s->gen_tb && (wasm_store_tci_hash || wasm_store_bisect_on)) {
uint64_t pc = s->gen_tb->pc;
uint32_t h = (uint32_t)((pc * 0x9e3779b97f4a7c15ull) >> 33);