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c: cast NULL in advance to avoid comparison warnings

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This commit is contained in:
Jacob Young 2022-10-06 00:54:45 -04:00
parent 497329622a
commit 3b501b2d81
1 changed files with 5 additions and 5 deletions
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10
src/codegen/c.zig
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@ -655,11 +655,11 @@ pub const DeclGen = struct {
return dg.fail("TODO: C backend: implement lowering large float values", .{});
},
.Pointer => switch (val.tag()) {
.null_value => try writer.writeAll("NULL"),
// Technically this should produce NULL but the integer literal 0 will always coerce
// to the assigned pointer type. Note this is just a hack to fix warnings from ordered comparisons (<, >, etc)
// between pointers and 0, which is an extension to begin with.
.zero => try writer.writeByte('0'),
.null_value, .zero => {
try writer.writeAll("((");
try dg.renderTypecast(writer, ty);
try writer.writeAll(")NULL)");
},
.variable => {
const decl = val.castTag(.variable).?.data.owner_decl;
return dg.renderDeclValue(writer, ty, val, decl);