llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/147880.diff


2 Files Affected:

- (modified) llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp 
(+1-1) 
- (added) llvm/test/CodeGen/AArch64/unsupported-object-format-err.ll (+10) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp 
b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp
index f918e3cbc7b80..5c8f57664a2cc 100644
--- a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp
+++ b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp
@@ -356,7 +356,7 @@ static MCAsmInfo *createAArch64MCAsmInfo(const 
MCRegisterInfo &MRI,
   else if (TheTriple.isOSBinFormatCOFF())
     MAI = new AArch64MCAsmInfoGNUCOFF();
   else
-    llvm_unreachable("Invalid target"); // FIXME: This is not unreachable
+    reportFatalUsageError("unsupported object format");
 
   // Initial state of the frame pointer is SP.
   unsigned Reg = MRI.getDwarfRegNum(AArch64::SP, true);
diff --git a/llvm/test/CodeGen/AArch64/unsupported-object-format-err.ll 
b/llvm/test/CodeGen/AArch64/unsupported-object-format-err.ll
new file mode 100644
index 0000000000000..740bde5e43c15
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/unsupported-object-format-err.ll
@@ -0,0 +1,10 @@
+; RUN: not llc -mtriple=aarch64-pc-unknown-xcoff -filetype=null %s 2>&1 | 
FileCheck %s
+; RUN: not llc -mtriple=aarch64-pc-unknown-goff -filetype=null %s 2>&1 | 
FileCheck %s
+
+; Make sure there is no crash or assert with unexpected object
+; formats.
+
+; CHECK: LLVM ERROR: unsupported object format
+define void @foo() {
+  ret void
+}

``````````

</details>


https://github.com/llvm/llvm-project/pull/147880
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