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| author | Peter Collingbourne <peter@pcc.me.uk> | 2016-12-09 00:33:27 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2016-12-09 00:33:27 +0000 |
| commit | 7a1e5bbe4e63c41dffa6d19668ebe72cda3f9803 (patch) | |
| tree | 2ce564b2df30fa39610929bf6e5bdedbfc0bf649 /llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll | |
| parent | 313b326bb6a5bc240f2cfeb9f403fe9f5d18bc4e (diff) | |
| download | bcm5719-llvm-7a1e5bbe4e63c41dffa6d19668ebe72cda3f9803.tar.gz bcm5719-llvm-7a1e5bbe4e63c41dffa6d19668ebe72cda3f9803.zip | |
Make WholeProgramDevirt understand ConstStruct vtables.
Based on a patch by LemonBoy!
Differential Revision: https://reviews.llvm.org/D26581
llvm-svn: 289162
Diffstat (limited to 'llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll')
| -rw-r--r-- | llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll b/llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll new file mode 100644 index 00000000000..81e41d46694 --- /dev/null +++ b/llvm/test/Transforms/WholeProgramDevirt/struct-vtable.ll @@ -0,0 +1,63 @@ +; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s + +target datalayout = "e-p:64:64" +target triple = "x86_64-unknown-linux-gnu" + +%vtTy = type { void (i8*)* } + +@vt = constant %vtTy { void (i8*)* @vf }, !type !0 + +define void @vf(i8* %this) { + ret void +} + +; CHECK: define void @call +define void @call(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 !"typeid") + call void @llvm.assume(i1 %p) + %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0 + %fptr = load i8*, i8** %fptrptr + %fptr_casted = bitcast i8* %fptr to void (i8*)* + ; CHECK: call void @vf( + call void %fptr_casted(i8* %obj) + ret void +} + +; CHECK: define void @call_oob +define void @call_oob(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 !"typeid") + call void @llvm.assume(i1 %p) + %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 4 + %fptr = load i8*, i8** %fptrptr + %fptr_casted = bitcast i8* %fptr to void (i8*)* + ; CHECK: call void % + call void %fptr_casted(i8* %obj) + ret void +} + +; CHECK: define void @call_unaligned +define void @call_unaligned(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 !"typeid") + 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 +} + +declare i1 @llvm.type.test(i8*, metadata) +declare void @llvm.assume(i1) + +!0 = !{i32 0, !"typeid"} |
