46667a1003
Reland of 31859f896.
This change implements new DAG notes GLOBAL_GET/GLOBAL_SET, and
lowering methods for load and stores of reference types from IR
globals. Once the lowering creates the new nodes, tablegen pattern
matches those and converts them to Wasm global.get/set.
Reviewed By: tlively
Differential Revision: https://reviews.llvm.org/D104797
22 lines
739 B
LLVM
22 lines
739 B
LLVM
; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -mattr=+reference-types | FileCheck %s
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%extern = type opaque
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%externref = type %extern addrspace(10)* ;; addrspace 10 is nonintegral
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@externref_global = local_unnamed_addr addrspace(1) global %externref undef
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define %extern @return_extern_undef() {
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; Returning a ref.null or an uninitialized externref would make
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; more sense if the return type would be %externref. However, in
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; this case this is an %extern value, which really is an opaque
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; type and should never really happen.
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ret %extern undef
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}
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; CHECK-LABEL: return_extern_undef:
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; CHECK-NEXT: functype return_extern_undef () -> ()
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; CHECK-NEXT: end_function
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; CHECK: .globl externref_global
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