| author |  LeRoyce Pearson <contact@leroycepearson.dev> 2022-08-09 16:08:59-06:00 |
| committer |  Andrew Kelley <andrew@ziglang.org> 2022-08-10 16:14:30-04:00 |
| log | 0e118ed0aca3d852d2499fa37d04adef62b03ead |
| tree | 16192710018414ad7cfc46833e29f724d9abbd4b |
| parent | 8fd20a5eb015fda4b27cef14c9e3149575861994 |
stage2: add compile error for shlExact overflow
- moves a stage1 test case and makes it target `llvm` backend instead
of `stage1` backend3 files changed, 15 insertions(+), 17 deletions(-)
src- test
- cases
- compile_errors
src/Sema.zig+5-7
| ... | ... | @@ -10269,16 +10269,14 @@ fn zirShl( |
| 10269 | 10269 | |
| 10270 | 10270 | const val = switch (air_tag) { |
| 10271 | 10271 | .shl_exact => val: { |
| 10272 | const shifted = try lhs_val.shl(rhs_val, lhs_ty, sema.arena, target); | |
| 10272 | const shifted = try lhs_val.shlWithOverflow(rhs_val, lhs_ty, sema.arena, target); | |
| 10273 | 10273 | if (scalar_ty.zigTypeTag() == .ComptimeInt) { |
| 10274 | break :val shifted; | |
| 10274 | break :val shifted.wrapped_result; | |
| 10275 | 10275 | } |
| 10276 | const int_info = scalar_ty.intInfo(target); | |
| 10277 | const truncated = try shifted.intTrunc(lhs_ty, sema.arena, int_info.signedness, int_info.bits, target); | |
| 10278 | if (try sema.compare(block, src, truncated, .eq, shifted, lhs_ty)) { | |
| 10279 | break :val shifted; | |
| 10276 | if (shifted.overflowed.compareWithZero(.eq)) { | |
| 10277 | break :val shifted.wrapped_result; | |
| 10280 | 10278 | } |
| 10281 | return sema.addConstUndef(lhs_ty); | |
| 10279 | return sema.fail(block, src, "operation caused overflow", .{}); | |
| 10282 | 10280 | }, |
| 10283 | 10281 | |
| 10284 | 10282 | .shl_sat => if (scalar_ty.zigTypeTag() == .ComptimeInt) |
test/cases/compile_errors/shlExact_shifts_out_1_bits.zig created+10
| ... | ... | @@ -0,0 +1,10 @@ |
| 1 | comptime { | |
| 2 | const x = @shlExact(@as(u8, 0b01010101), 2); | |
| 3 | _ = x; | |
| 4 | } | |
| 5 | ||
| 6 | // error | |
| 7 | // backend=llvm | |
| 8 | // target=native | |
| 9 | // | |
| 10 | // :2:15: error: operation caused overflow |
test/cases/compile_errors/stage1/obj/shlExact_shifts_out_1_bits.zig deleted-10
| ... | ... | @@ -1,10 +0,0 @@ |
| 1 | comptime { | |
| 2 | const x = @shlExact(@as(u8, 0b01010101), 2); | |
| 3 | _ = x; | |
| 4 | } | |
| 5 | ||
| 6 | // error | |
| 7 | // backend=stage1 | |
| 8 | // target=native | |
| 9 | // | |
| 10 | // tmp.zig:2:15: error: operation caused overflow |