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043ceffa29
Summary: In RS4GC it is possible that a base pointer is contained in a vector that has undergone a bitcast from one element-pointertype to another. We teach RS4GC how to look through bitcasts of vector types when looking for a base pointer. Reviewers: anna Reviewed By: anna Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D38849 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315694 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
993 B
LLVM
27 lines
993 B
LLVM
; RUN: opt -S -rewrite-statepoints-for-gc < %s | FileCheck %s
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;
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; A test to make sure that we can look through bitcasts of
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; vector types when a base pointer is contained in a vector.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: uwtable
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define void @test() gc "statepoint-example" {
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; CHECK-LABEL: @test
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entry:
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; CHECK-LABEL: entry
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; CHECK: %bc = bitcast
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; CHECK: %[[p1:[A-Za-z0-9_]+]] = extractelement
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; CHECK: %[[p2:[A-Za-z0-9_]+]] = extractelement
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; CHECK: llvm.experimental.gc.statepoint
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; CHECK: %[[p2]].relocated = {{.+}} @llvm.experimental.gc.relocate
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; CHECK: %[[p1]].relocated = {{.+}} @llvm.experimental.gc.relocate
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; CHECK: load atomic
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%bc = bitcast <8 x i8 addrspace(1)*> undef to <8 x i32 addrspace(1)*>
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%ptr= extractelement <8 x i32 addrspace(1)*> %bc, i32 7
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%0 = call i8 addrspace(1)* undef() [ "deopt"() ]
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%1 = load atomic i32, i32 addrspace(1)* %ptr unordered, align 4
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unreachable
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}
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