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| author | Peter Collingbourne <peter@pcc.me.uk> | 2016-12-09 01:10:11 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2016-12-09 01:10:11 +0000 |
| commit | 8786754cc3d6a93357283af9976ec3bb8fe78abb (patch) | |
| tree | 8201969d5b604379d5eb1c242a9e8f4998a5aebe /llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll | |
| parent | 14f6b2c0351bf432169f7bf473aae75a5264492f (diff) | |
| download | bcm5719-llvm-8786754cc3d6a93357283af9976ec3bb8fe78abb.tar.gz bcm5719-llvm-8786754cc3d6a93357283af9976ec3bb8fe78abb.zip | |
WholeProgramDevirt: Teach the pass to handle structs of arrays.
This will become necessary in some cases once D22296 lands.
llvm-svn: 289165
Diffstat (limited to 'llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll')
| -rw-r--r-- | llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll b/llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll index 97445efb101..4885be77756 100644 --- a/llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll +++ b/llvm/test/Transforms/WholeProgramDevirt/bad-read-from-vtable.ll @@ -3,14 +3,15 @@ target datalayout = "e-p:64:64" target triple = "x86_64-unknown-linux-gnu" -@vt = global [2 x i8*] [i8* zeroinitializer, i8* bitcast (void (i8*)* @vf to i8*)], !type !0 +@vt1 = global [2 x i8*] [i8* zeroinitializer, i8* bitcast (void (i8*)* @vf to i8*)], !type !0 +@vt2 = global i8* bitcast (void (i8*)* @vf to i8*), !type !1 define void @vf(i8* %this) { ret void } -; CHECK: define void @unaligned -define void @unaligned(i8* %obj) { +; CHECK: define void @unaligned1 +define void @unaligned1(i8* %obj) { %vtableptr = bitcast i8* %obj to [1 x i8*]** %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr %vtablei8 = bitcast [1 x i8*]* %vtable to i8* @@ -25,6 +26,22 @@ define void @unaligned(i8* %obj) { ret void } +; CHECK: define void @unaligned2 +define void @unaligned2(i8* %obj) { + %vtableptr = bitcast i8* %obj to [1 x i8*]** + %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr + %vtablei8 = bitcast [1 x i8*]* %vtable to i8* + %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid2") + call void @llvm.assume(i1 %p) + %fptrptr = getelementptr i8, i8* %vtablei8, i32 1 + %fptrptr_casted = bitcast i8* %fptrptr to i8** + %fptr = load i8*, i8** %fptrptr_casted + %fptr_casted = bitcast i8* %fptr to void (i8*)* + ; CHECK: call void % + call void %fptr_casted(i8* %obj) + ret void +} + ; CHECK: define void @outofbounds define void @outofbounds(i8* %obj) { %vtableptr = bitcast i8* %obj to [1 x i8*]** @@ -61,3 +78,4 @@ declare i1 @llvm.type.test(i8*, metadata) declare void @llvm.assume(i1) !0 = !{i32 0, !"typeid"} +!1 = !{i32 0, !"typeid2"} |
