[PATCH] D53883: [bindings/go] Add Go bindings to LLVMGetIndices

[Ayke via Phabricator via llvm-commits]

aykevl created this revision.
aykevl added reviewers: whitequark, pcc.
Herald added a subscriber: llvm-commits.

This instruction is useful for inspecting generated IR. Unlike most other operations, indices cannot be inspected using the generic Value.Opcode() function so a specialized function needs to be added.


Repository:
  rL LLVM

https://reviews.llvm.org/D53883

Files:
  bindings/go/llvm/ir.go


Index: bindings/go/llvm/ir.go
===================================================================
--- bindings/go/llvm/ir.go
+++ bindings/go/llvm/ir.go
@@ -1259,6 +1259,19 @@
 	return
 }
 
+// Operations on aggregates
+func (v Value) Indices() []uint32 {
+	num := C.LLVMGetNumIndices(v.C)
+	indicesPtr := C.LLVMGetIndices(v.C)
+	// https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices
+	rawIndices := (*[1 << 30]C.uint)(unsafe.Pointer(indicesPtr))[:num:num]
+	indices := make([]uint32, num)
+	for i := range indices {
+		indices[i] = uint32(rawIndices[i])
+	}
+	return indices
+}
+
 //-------------------------------------------------------------------------
 // llvm.Builder
 //-------------------------------------------------------------------------


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