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Fix sanitizer check issue when both def reg and ref reg are the same (#1226)

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Fix issue of instruction like MOV i3, i3
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liang.he 2022-06-14 17:13:11 +08:00 committed by GitHub
parent 96fa546cc9
commit 5340e3c3de
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1 changed files with 17 additions and 3 deletions
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20
core/iwasm/fast-jit/jit_regalloc.c
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@ -358,19 +358,33 @@ is_alloc_candidate(JitCompContext *cc, JitReg reg)
static void
check_vreg_definition(RegallocContext *rc, JitInsn *insn)
{
unsigned j;
JitRegVec regvec = jit_insn_opnd_regs(insn);
unsigned first_use = jit_insn_opnd_first_use(insn);
unsigned i;
JitReg *regp;
unsigned first_use = jit_insn_opnd_first_use(insn);
JitReg reg_defined;
/* check if there is the definition of an vr before its references */
JIT_REG_VEC_FOREACH_USE(regvec, j, regp, first_use)
JIT_REG_VEC_FOREACH(regvec, i, regp)
{
VirtualReg *vr = NULL;
if (!is_alloc_candidate(rc->cc, *regp))
continue;
/*a strong assumption that there is only on defined reg*/
if (i < first_use) {
reg_defined = *regp;
continue;
}
/**
* both definition and references are in one instruction,
* like MOV i3,i3
**/
if (reg_defined == *regp)
continue;
vr = rc_get_vr(rc, *regp);
bh_assert(vr->distances);
}