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llvm-project/lld/test/wasm/signature-mismatch-unknown.ll

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[lld][WebAssembly] Convert some lld tests to assembly When we originally wrote these tests we didn't have a stable and fleshed out assembly format. Now we do so we should prefer that over llvm ir for lld tests to avoid including more part of llvm than necessary in order to run the test. This change converts just 30 out of about 130 test files. More to come when I have some more time. Differential Revision: https://reviews.llvm.org/D80361
2020-05-21 12:35:18 +08:00
; RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/ret32.s -o %t.ret32.o
[WebAssembly] Relax signature checking for undefined functions that are not called directly When function signatures don't match and the undefined function is not called directly (i.e. only has its address taken) we don't issue a warning or create a runtime thunk for the undefined function. Instead in this case we simply use the defined version of the function. This is possible since checking signatures of dynamic calls happens at runtime so any invalid usage will still result in a runtime error. This is needed to allow C++ programs to link without generating warnings. Its not uncommon in C++ for vtables to be populated by function address whee the signature of the function is not known in the compilation unit. In this case clang declares the method as void(void) and relies on the vtable caller casting the data back to the correct signature. Fixes: https://bugs.llvm.org/show_bug.cgi?id=40412 Differential Revision: https://reviews.llvm.org/D62153 llvm-svn: 361678
2019-05-25 06:45:08 +08:00
; RUN: llc -filetype=obj %s -o %t.main.o
; RUN: wasm-ld --fatal-warnings -o %t.wasm %t.ret32.o %t.main.o
; RUN: wasm-ld --fatal-warnings -o %t.wasm %t.main.o %t.ret32.o
[lld][WebAssembly] Fix spurious signature mismatch warnings Summary: This a follow up on: https://reviews.llvm.org/D62153 Handle the case where there are multiple object files that contain undefined references to the same function. We only generate a function variant if the existing symbol is directly called. See: https://github.com/emscripten-core/emscripten/issues/8995 Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67015 llvm-svn: 370509
2019-08-31 03:50:59 +08:00
; Also test the case where there are two different object files that contains
[lld] NFC: fix trivial typos in comments Differential Revision: https://reviews.llvm.org/D72339
2020-04-02 00:21:08 +08:00
; references ret32:
[lld][WebAssembly] Fix spurious signature mismatch warnings Summary: This a follow up on: https://reviews.llvm.org/D62153 Handle the case where there are multiple object files that contain undefined references to the same function. We only generate a function variant if the existing symbol is directly called. See: https://github.com/emscripten-core/emscripten/issues/8995 Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67015 llvm-svn: 370509
2019-08-31 03:50:59 +08:00
; %t.main.o: Does not call ret32 directly; used the wrong signature.
; %t.call-ret32.o: Calls ret32 directly; uses the correct signature.
[lld][WebAssembly] Convert some lld tests to assembly When we originally wrote these tests we didn't have a stable and fleshed out assembly format. Now we do so we should prefer that over llvm ir for lld tests to avoid including more part of llvm than necessary in order to run the test. This change converts just 30 out of about 130 test files. More to come when I have some more time. Differential Revision: https://reviews.llvm.org/D80361
2020-05-21 12:35:18 +08:00
; RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/call-ret32.s -o %t.call-ret32.o
[lld][WebAssembly] Fix spurious signature mismatch warnings Summary: This a follow up on: https://reviews.llvm.org/D62153 Handle the case where there are multiple object files that contain undefined references to the same function. We only generate a function variant if the existing symbol is directly called. See: https://github.com/emscripten-core/emscripten/issues/8995 Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67015 llvm-svn: 370509
2019-08-31 03:50:59 +08:00
; RUN: wasm-ld --export=call_ret32 --fatal-warnings -o %t.wasm %t.main.o %t.call-ret32.o %t.ret32.o
; RUN: wasm-ld --export=call_ret32 --fatal-warnings -o %t.wasm %t.call-ret32.o %t.main.o %t.ret32.o
[WebAssembly] Relax signature checking for undefined functions that are not called directly When function signatures don't match and the undefined function is not called directly (i.e. only has its address taken) we don't issue a warning or create a runtime thunk for the undefined function. Instead in this case we simply use the defined version of the function. This is possible since checking signatures of dynamic calls happens at runtime so any invalid usage will still result in a runtime error. This is needed to allow C++ programs to link without generating warnings. Its not uncommon in C++ for vtables to be populated by function address whee the signature of the function is not known in the compilation unit. In this case clang declares the method as void(void) and relies on the vtable caller casting the data back to the correct signature. Fixes: https://bugs.llvm.org/show_bug.cgi?id=40412 Differential Revision: https://reviews.llvm.org/D62153 llvm-svn: 361678
2019-05-25 06:45:08 +08:00
target triple = "wasm32-unknown-unknown"
[lld] Fix trivial typos in comments Reviewed By: ruiu, MaskRay Differential Revision: https://reviews.llvm.org/D72196
2020-01-07 02:21:05 +08:00
; Function declaration with incorrect signature.
[WebAssembly] Relax signature checking for undefined functions that are not called directly When function signatures don't match and the undefined function is not called directly (i.e. only has its address taken) we don't issue a warning or create a runtime thunk for the undefined function. Instead in this case we simply use the defined version of the function. This is possible since checking signatures of dynamic calls happens at runtime so any invalid usage will still result in a runtime error. This is needed to allow C++ programs to link without generating warnings. Its not uncommon in C++ for vtables to be populated by function address whee the signature of the function is not known in the compilation unit. In this case clang declares the method as void(void) and relies on the vtable caller casting the data back to the correct signature. Fixes: https://bugs.llvm.org/show_bug.cgi?id=40412 Differential Revision: https://reviews.llvm.org/D62153 llvm-svn: 361678
2019-05-25 06:45:08 +08:00
declare dso_local void @ret32()
; Simply taking the address of the function should *not* generate the
; the signature mismatch warning.
@ptr = dso_local global i8* bitcast (void ()* @ret32 to i8*), align 8
define hidden void @_start() local_unnamed_addr {
%addr = load i32 ()*, i32 ()** bitcast (i8** @ptr to i32 ()**), align 8
call i32 %addr()
ret void
}