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test: check @tagName() in callconv C function

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This is a regression test for an x86_64 backend miscompilation when
using @tagName() in a callconv(.c) function with -fPIC.
This commit is contained in:
Isaac Freund 2025-02-06 11:52:04 +01:00
parent 043e3b29ce
commit 87bbb49d5f
1 changed files with 17 additions and 0 deletions
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17
test/behavior/enum.zig
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@ -1070,6 +1070,23 @@ test "tag name with signed enum values" {
try expect(mem.eql(u8, @tagName(b), "bravo"));
}
test "@tagName in callconv(.c) function" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_riscv64) return error.SkipZigTest;
try expect(mem.orderZ(u8, testEnumTagNameCallconvC(), "Two") == .eq);
comptime assert(mem.orderZ(u8, testEnumTagNameCallconvC(), "Two") == .eq);
}
fn testEnumTagNameCallconvC() callconv(.c) [*:0]const u8 {
var e: BareNumber = .Two;
_ = &e;
return @tagName(e);
}
test "enum literal casting to optional" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;