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llvm-project/llvm/test/Other/bb-badref.ll

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[AsmWriter] Construct SlotTracker with the function This patch teaches BasicBlock::print to construct an instance of SlotTracker with the containing function. Without this patch, we dump: *** IR Dump After LoopInstSimplifyPass *** ; Preheader: br label %1 ; Loop: <badref>: ; preds = %1, %0 br label %1 Note "<badref>" above. This happens because BasicBlock::print calls: SlotTracker SlotTable(this->getModule()); Note that this constructor does not add the contents of functions to the slot table. That is, basic blocks are left unnumbered. This patch fixes the problem by switching to: SlotTracker SlotTable(this->getParent()); which does add the contents of the Module and the function, this->getParent(), to the slot table. Differential Revision: https://reviews.llvm.org/D89567
2020-10-21 06:01:39 +08:00
; RUN: opt -passes=loop-instsimplify -print-after-all -disable-output -S < %s 2>&1 | FileCheck %s
; loop-instsimplify dumps individual basic blocks as part of a loop,
; not a function. Verify that the non-entry basic block is labeled as
; "1", not "<badref>".
; CHECK-NOT: <badref>
define void @foo() {
br label %1
1:
br label %1
}