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compiler: document defer frame field dependency

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This commit is contained in:
Jake Bailey
2026-06-02 14:13:36 -07:00
committed by Ron Evans
parent 278aa09819
commit 469e2434fd
2 changed files with 4 additions and 2 deletions
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compiler/defer.go
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@@ -69,6 +69,8 @@ func (b *builder) deferInitFunc() {
// in the setjmp-like inline assembly.
deferFrameType := b.getLLVMRuntimeType("deferFrame")
b.deferFrame = b.CreateAlloca(deferFrameType, "deferframe.buf")
// The field index must match the DeferPtr field in runtime.deferFrame,
// defined in src/runtime/panic.go.
b.deferPtr = b.CreateInBoundsGEP(deferFrameType, b.deferFrame, []llvm.Value{
llvm.ConstInt(b.ctx.Int32Type(), 0, false),
llvm.ConstInt(b.ctx.Int32Type(), 6, false), // DeferPtr field