[llvm] [X86] Check for AMXTile (PR #136507)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-x86

Author: AZero13 (AZero13)

<details>
<summary>Changes</summary>

Check for hasAMXTILE before operating, else return false.

---
Full diff: https://github.com/llvm/llvm-project/pull/136507.diff


1 Files Affected:

- (modified) llvm/lib/Target/X86/X86LowerTileCopy.cpp (+2) 


``````````diff
diff --git a/llvm/lib/Target/X86/X86LowerTileCopy.cpp b/llvm/lib/Target/X86/X86LowerTileCopy.cpp
index fe13ebc6c7675..f4949c52f03ca 100644
--- a/llvm/lib/Target/X86/X86LowerTileCopy.cpp
+++ b/llvm/lib/Target/X86/X86LowerTileCopy.cpp
@@ -75,6 +75,8 @@ bool X86LowerTileCopy::runOnMachineFunction(MachineFunction &MF) {
     return false;
 
   const X86Subtarget &ST = MF.getSubtarget<X86Subtarget>();
+  if (!ST.hasAMXTILE())
+    return false;
   const X86InstrInfo *TII = ST.getInstrInfo();
   const TargetRegisterInfo *TRI = ST.getRegisterInfo();
   BitVector GR64Regs =

``````````

</details>


https://github.com/llvm/llvm-project/pull/136507