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stage2: add compile error for shlExact overflow

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- moves a stage1 test case and makes it target `llvm` backend instead
  of `stage1` backend
This commit is contained in:
LeRoyce Pearson 2022-08-09 16:08:59 -06:00 committed by Andrew Kelley
parent 8fd20a5eb0
commit 0e118ed0ac
2 changed files with 7 additions and 9 deletions
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12
src/Sema.zig
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@ -10269,16 +10269,14 @@ fn zirShl(
const val = switch (air_tag) {
.shl_exact => val: {
const shifted = try lhs_val.shl(rhs_val, lhs_ty, sema.arena, target);
const shifted = try lhs_val.shlWithOverflow(rhs_val, lhs_ty, sema.arena, target);
if (scalar_ty.zigTypeTag() == .ComptimeInt) {
break :val shifted;
break :val shifted.wrapped_result;
}
const int_info = scalar_ty.intInfo(target);
const truncated = try shifted.intTrunc(lhs_ty, sema.arena, int_info.signedness, int_info.bits, target);
if (try sema.compare(block, src, truncated, .eq, shifted, lhs_ty)) {
break :val shifted;
if (shifted.overflowed.compareWithZero(.eq)) {
break :val shifted.wrapped_result;
}
return sema.addConstUndef(lhs_ty);
return sema.fail(block, src, "operation caused overflow", .{});
},
.shl_sat => if (scalar_ty.zigTypeTag() == .ComptimeInt)

4
test/cases/compile_errors/stage1/obj/shlExact_shifts_out_1_bits.zig → test/cases/compile_errors/shlExact_shifts_out_1_bits.zig
View File

@ -4,7 +4,7 @@ comptime {
}
// error
// backend=stage1
// backend=llvm
// target=native
//
// tmp.zig:2:15: error: operation caused overflow
// :2:15: error: operation caused overflow