72 lines
2.3 KiB
LLVM
72 lines
2.3 KiB
LLVM
; RUN: opt -debug-pass-manager -aa-pipeline=basic-aa -passes='require<phi-values>,memcpyopt,instcombine' -disable-output < %s 2>&1 | FileCheck %s
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; Check that phi values is not run when it's not already available, and that
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; basicaa is not freed after a pass that preserves CFG, as it preserves CFG.
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; CHECK-DAG: Running analysis: PhiValuesAnalysis
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; CHECK-DAG: Running analysis: BasicAA
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; CHECK-DAG: Running analysis: MemorySSA
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; CHECK: Running pass: MemCpyOptPass
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; CHECK-NOT: Invalidating analysis
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; CHECK: Running pass: InstCombinePass
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target datalayout = "p:8:8-n8"
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declare void @otherfn(ptr)
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declare i32 @__gxx_personality_v0(...)
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
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@c = external global ptr, align 1
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; This function is one where if we didn't free basicaa after memcpyopt then the
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; usage of basicaa in instcombine would cause a segfault due to stale phi-values
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; results being used.
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define void @fn(ptr %this, ptr %ptr) personality ptr @__gxx_personality_v0 {
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entry:
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%arr = alloca [4 x i8], align 8
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br i1 undef, label %then, label %if
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if:
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br label %then
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then:
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%phi = phi ptr [ %ptr, %if ], [ null, %entry ]
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store i8 1, ptr %arr, align 8
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%load = load i64, ptr %phi, align 8
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%gep2 = getelementptr inbounds i8, ptr undef, i64 %load
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%gep3 = getelementptr inbounds i8, ptr %gep2, i64 40
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invoke i32 undef(ptr undef)
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to label %invoke unwind label %lpad
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invoke:
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unreachable
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lpad:
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landingpad { ptr, i32 }
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catch ptr null
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call void @otherfn(ptr nonnull %arr)
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unreachable
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}
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; When running instcombine after memdep, the basicaa used by instcombine uses
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; the phivalues that memdep used. This would then cause a segfault due to
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; instcombine deleting a phi whose values had been cached.
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define void @fn2() {
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entry:
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%a = alloca i8, align 1
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%0 = load ptr, ptr @c, align 1
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%d.0 = phi ptr [ %0, %entry ], [ null, %for.body ]
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br i1 undef, label %for.body, label %for.cond.cleanup
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for.body: ; preds = %for.cond
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store volatile i8 undef, ptr %a, align 1
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br label %for.cond
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for.cond.cleanup: ; preds = %for.cond
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call void @llvm.lifetime.end.p0(i64 1, ptr %a)
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%1 = load ptr, ptr %d.0, align 1
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store ptr %1, ptr @c, align 1
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ret void
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}
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