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llvm: support small error limits

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Resolves: #23533
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mlugg 2025-08-12 22:58:52 +01:00
parent b8124d9c0b
commit 38ba425b26
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GPG Key ID: 3F5B7DCCBF4AF02E
1 changed files with 4 additions and 1 deletions
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src/codegen/llvm.zig
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@ -10475,11 +10475,14 @@ pub const FuncGen = struct {
const slice_ty = self.typeOfIndex(inst);
const slice_llvm_ty = try o.lowerType(pt, slice_ty);
// If operand is small (e.g. `u8`), then signedness becomes a problem -- GEP always treats the index as signed.
const extended_operand = try self.wip.conv(.unsigned, operand, try o.lowerType(pt, .usize), "");
const error_name_table_ptr = try self.getErrorNameTable();
const error_name_table =
try self.wip.load(.normal, .ptr, error_name_table_ptr.toValue(&o.builder), .default, "");
const error_name_ptr =
try self.wip.gep(.inbounds, slice_llvm_ty, error_name_table, &.{operand}, "");
try self.wip.gep(.inbounds, slice_llvm_ty, error_name_table, &.{extended_operand}, "");
return self.wip.load(.normal, slice_llvm_ty, error_name_ptr, .default, "");
}