llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-clang-codegen Author: Yeting Kuo (yetingk) <details> <summary>Changes</summary> This fixes issue #<!-- -->63878 caused by creating an integer with zero bitwidth. --- Full diff: https://github.com/llvm/llvm-project/pull/99849.diff 2 Files Affected: - (modified) clang/lib/CodeGen/CGStmt.cpp (+4-1) - (added) clang/test/CodeGen/inline-asm-sizeless.c (+7) ``````````diff diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp index aa97f685ac7a9..92955e6cf4c96 100644 --- a/clang/lib/CodeGen/CGStmt.cpp +++ b/clang/lib/CodeGen/CGStmt.cpp @@ -2751,7 +2751,10 @@ void CodeGenFunction::EmitAsmStmt(const AsmStmt &S) { if (RequiresCast) { unsigned Size = getContext().getTypeSize(QTy); - Ty = llvm::IntegerType::get(getLLVMContext(), Size); + if (Size) + Ty = llvm::IntegerType::get(getLLVMContext(), Size); + else + CGM.Error(S.getAsmLoc(), "Output operand is sizeless!"); } ResultRegTypes.push_back(Ty); // If this output is tied to an input, and if the input is larger, then diff --git a/clang/test/CodeGen/inline-asm-sizeless.c b/clang/test/CodeGen/inline-asm-sizeless.c new file mode 100644 index 0000000000000..29c1fc5b0b8f7 --- /dev/null +++ b/clang/test/CodeGen/inline-asm-sizeless.c @@ -0,0 +1,7 @@ +// RUN: not %clang_cc1 -S %s -o /dev/null 2>&1 | FileCheck %s + +// CHECK: error: Output operand is sizeless! +void foo(void) { + extern long bar[]; + asm ("" : "=r"(bar)); +} `````````` </details> https://github.com/llvm/llvm-project/pull/99849 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
