forked from OSchip/llvm-project
06d07ec4a3
Summary: A few of the ARM MVE builtins directly return a structure type. This causes an assertion failure at code-gen time if you try to assign the result of the builtin to a variable, because the `RValue` created in `EmitBuiltinExpr` from the `llvm::Value` produced by codegen is always made by `RValue::get()`, which creates a non-aggregate `RValue` that will fail an assertion when `AggExprEmitter::withReturnValueSlot` calls `Src.getAggregatePointer()`. A similar failure occurs if you try to use the struct return value directly to extract one field, e.g. `vld2q(address).val[0]`. The existing code-gen tests for those MVE builtins pass the returned structure type directly to the C `return` statement, which apparently managed to avoid that particular code path, so we didn't notice the crash. Now `EmitBuiltinExpr` checks the evaluation kind of the builtin's return value, and does the necessary handling for aggregate returns. I've added two extra test cases, both of which crashed before this change. Reviewers: dmgreen, rjmccall Reviewed By: rjmccall Subscribers: kristof.beyls, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D72271 |
||
|---|---|---|
| .. | ||
| ARCMigrate | ||
| AST | ||
| ASTMatchers | ||
| Analysis | ||
| Basic | ||
| CodeGen | ||
| CrossTU | ||
| DirectoryWatcher | ||
| Driver | ||
| Edit | ||
| Format | ||
| Frontend | ||
| FrontendTool | ||
| Headers | ||
| Index | ||
| Lex | ||
| Parse | ||
| Rewrite | ||
| Sema | ||
| Serialization | ||
| StaticAnalyzer | ||
| Tooling | ||
| CMakeLists.txt | ||