derek.holloway
7502bf64a4
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54 lines
1.2 KiB
LLVM
54 lines
1.2 KiB
LLVM
; RUN: opt -S -passes=lowertypetests %s | llc -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck %s
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; Tests that we correctly assign indexes for control flow integrity.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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@0 = private unnamed_addr constant [2 x ptr] [ptr @f, ptr @g], align 16
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; CHECK-LABEL: h:
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; CHECK-NOT: .indidx
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define void @h() !type !0 {
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ret void
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}
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; CHECK-LABEL: f:
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; CHECK: .indidx 2
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define void @f() !type !0 {
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ret void
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}
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; CHECK-LABEL: g:
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; CHECK: .indidx 1
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define void @g() !type !1 {
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ret void
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}
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!0 = !{i32 0, !"typeid1"}
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!1 = !{i32 0, !"typeid2"}
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declare i1 @llvm.type.test(ptr %ptr, metadata %bitset) nounwind readnone
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declare void @llvm.trap() nounwind noreturn
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; CHECK-LABEL: foo:
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; CHECK: br_if
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; CHECK: br_if
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; CHECK: unreachable
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define i1 @foo(ptr %p) {
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%x = call i1 @llvm.type.test(ptr %p, metadata !"typeid1")
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br i1 %x, label %contx, label %trap
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trap:
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tail call void @llvm.trap() #1
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unreachable
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contx:
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%y = call i1 @llvm.type.test(ptr %p, metadata !"typeid2")
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br i1 %y, label %conty, label %trap
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conty:
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%z = add i1 %x, %y
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ret i1 %z
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}
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