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Add -integer-division-by-zero:all-bits

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This commit is contained in:
gingerBill
2025-08-10 18:29:08 +01:00
parent b6e0b48481
commit 8df69c95c3
4 changed files with 59 additions and 11 deletions
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src/llvm_backend_expr.cpp
+19
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@@ -305,6 +305,9 @@ gb_internal IntegerDivisionByZeroKind lb_check_for_integer_division_by_zero_beha
if (flags & OptInFeatureFlag_IntegerDivisionByZero_Self) {
return IntegerDivisionByZero_Self;
}
if (flags & OptInFeatureFlag_IntegerDivisionByZero_AllBits) {
return IntegerDivisionByZero_AllBits;
}
}
return build_context.integer_division_by_zero_behaviour;
}
@@ -1140,6 +1143,7 @@ gb_internal LLVMValueRef lb_integer_division(lbProcedure *p, LLVMValueRef lhs, L
GB_ASSERT(LLVMTypeOf(lhs) == type);
LLVMValueRef zero = LLVMConstNull(type);
LLVMValueRef all_bits = LLVMConstNot(zero);
auto behaviour = lb_check_for_integer_division_by_zero_behaviour(p);
auto *call = is_signed ? LLVMBuildSDiv : LLVMBuildUDiv;
@@ -1151,6 +1155,9 @@ gb_internal LLVMValueRef lb_integer_division(lbProcedure *p, LLVMValueRef lhs, L
return lhs;
case IntegerDivisionByZero_Zero:
return zero;
case IntegerDivisionByZero_AllBits:
// return all_bits;
break;
}
} else {
if (!is_signed && lb_sizeof(type) <= 8) {
@@ -1198,6 +1205,9 @@ gb_internal LLVMValueRef lb_integer_division(lbProcedure *p, LLVMValueRef lhs, L
case IntegerDivisionByZero_Self:
incoming_values[1] = lhs;
break;
case IntegerDivisionByZero_AllBits:
incoming_values[1] = all_bits;
break;
}
lb_emit_jump(p, done_block);
@@ -1211,6 +1221,7 @@ gb_internal LLVMValueRef lb_integer_division(lbProcedure *p, LLVMValueRef lhs, L
res = incoming_values[0];
break;
case IntegerDivisionByZero_Zero:
case IntegerDivisionByZero_AllBits:
res = LLVMBuildPhi(p->builder, type, "");
GB_ASSERT(p->curr_block->preds.count >= 2);
@@ -1229,6 +1240,7 @@ gb_internal LLVMValueRef lb_integer_division_intrinsics(lbProcedure *p, LLVMValu
GB_ASSERT(LLVMTypeOf(lhs) == type);
LLVMValueRef zero = LLVMConstNull(type);
LLVMValueRef all_bits = LLVMConstNot(zero);
auto behaviour = lb_check_for_integer_division_by_zero_behaviour(p);
auto const do_op = [&]() -> LLVMValueRef {
@@ -1285,6 +1297,9 @@ gb_internal LLVMValueRef lb_integer_division_intrinsics(lbProcedure *p, LLVMValu
case IntegerDivisionByZero_Self:
incoming_values[1] = lhs;
break;
case IntegerDivisionByZero_AllBits:
incoming_values[1] = all_bits;
break;
}
lb_emit_jump(p, done_block);
@@ -1298,6 +1313,7 @@ gb_internal LLVMValueRef lb_integer_division_intrinsics(lbProcedure *p, LLVMValu
res = incoming_values[0];
break;
case IntegerDivisionByZero_Zero:
case IntegerDivisionByZero_AllBits:
res = LLVMBuildPhi(p->builder, type, "");
GB_ASSERT(p->curr_block->preds.count >= 2);
@@ -1344,6 +1360,7 @@ gb_internal LLVMValueRef lb_integer_modulo(lbProcedure *p, LLVMValueRef lhs, LLV
case IntegerDivisionByZero_Self:
return zero;
case IntegerDivisionByZero_Zero:
case IntegerDivisionByZero_AllBits:
return lhs;
}
} else {
@@ -1386,6 +1403,7 @@ gb_internal LLVMValueRef lb_integer_modulo(lbProcedure *p, LLVMValueRef lhs, LLV
LLVMBuildUnreachable(p->builder);
break;
case IntegerDivisionByZero_Zero:
case IntegerDivisionByZero_AllBits:
incoming_values[1] = lhs;
break;
case IntegerDivisionByZero_Self:
@@ -1404,6 +1422,7 @@ gb_internal LLVMValueRef lb_integer_modulo(lbProcedure *p, LLVMValueRef lhs, LLV
res = incoming_values[0];
break;
case IntegerDivisionByZero_Zero:
case IntegerDivisionByZero_AllBits:
res = LLVMBuildPhi(p->builder, type, "");
GB_ASSERT(p->curr_block->preds.count >= 2);