https://bugs.llvm.org/show_bug.cgi?id=47933
Bug ID: 47933
Summary: Assertion failure in WebAssemblyFastISel
Product: clang
Version: 11.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangb...@nondot.org
Reporter: jjo...@quarkslab.com
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
Created attachment 24086
--> https://bugs.llvm.org/attachment.cgi?id=24086&action=edit
Output of the crash
When compiling the reduced test case below for the wasm32 target with
clang -target wasm32 -c test.ll -o /dev/null
Where test.ll is
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
define private void @failing(i32 %0) {
entry:
%1 = alloca i8, i32 4
%2 = ptrtoint i8* %1 to i32
%3 = and i32 %2, 2
%4 = add i32 %2, %3
%5 = inttoptr i32 %4 to i32*
store i32 %0, i32* %5
ret void
}
```
Clang fails with the following message:
llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp:76: void (anonymous
namespace)::WebAssemblyFastISel::Address::setReg(unsigned int): Assertion
`isRegBase() && "Invalid base register access!"' failed.
See the attached log for details.
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