1469d82e1c
As defined in LangRef, branching on `undef` is undefined behavior. This PR aims to remove undefined behavior from tests. As UB tests break Alive2 and may be the root cause of breaking future optimizations. Here's an Alive2 proof for one of the examples: https://alive2.llvm.org/ce/z/TncxhP
32 lines
916 B
LLVM
32 lines
916 B
LLVM
; RUN: opt -passes=licm -verify-memoryssa %s -S | FileCheck %s
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; REQUIRES: asserts
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; Ensure verification doesn't fail with unreachable blocks.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-grtev4-linux-gnu"
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declare dso_local void @f()
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; CHECK-LABEL: @foo
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define dso_local void @foo(i1 %arg) {
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entry:
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br i1 %arg, label %if.then, label %if.end
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if.then: ; preds = %entry
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br label %try.cont
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if.end: ; preds = %entry
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; 1 = MemoryDef(liveOnEntry)
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call void @f()
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br label %try.cont
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catch: ; No predecessors!
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; 2 = MemoryDef(liveOnEntry)
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call void @f()
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br label %try.cont
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try.cont: ; preds = %if.end, %catch, %if.then
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; 3 = MemoryPhi({if.then,liveOnEntry},{if.end,1},{catch,liveOnEntry})
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ret void
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}
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