[llvm] [SystemZ] Don't use FP Load and Test as comparisons to same reg (PR #78074)

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git-clang-format --diff 4ea5c603b4c4db36b8ee7e04adf96416f4d996dc 7d22ecfd4e3410a29df4213472a8350c5d119ee3 -- llvm/lib/Target/SystemZ/SystemZElimCompare.cpp llvm/lib/Target/SystemZ/SystemZISelLowering.cpp llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp b/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp
index 38e65cd2ea..bda3957c79 100644
--- a/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp
@@ -495,7 +495,7 @@ static bool isCompareZero(MachineInstr &Compare) {
   if (isLoadAndTestAsCmp(Compare))
     return true;
   return Compare.getNumExplicitOperands() == 2 &&
-    Compare.getOperand(1).isImm() && Compare.getOperand(1).getImm() == 0;
+         Compare.getOperand(1).isImm() && Compare.getOperand(1).getImm() == 0;
 }
 
 // Try to optimize cases where comparison instruction Compare is testing
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
index bf6547cc87..5600fab54f 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -1691,7 +1691,8 @@ unsigned SystemZInstrInfo::getLoadAndTest(unsigned Opcode) const {
   case SystemZ::LGF:    return SystemZ::LTGF;
   case SystemZ::LR:     return SystemZ::LTR;
   case SystemZ::LGFR:   return SystemZ::LTGFR;
-  case SystemZ::LGR:    return SystemZ::LTGR;
+  case SystemZ::LGR:
+    return SystemZ::LTGR;
   case SystemZ::LCDFR:  return SystemZ::LCDBR;
   case SystemZ::LPDFR:  return SystemZ::LPDBR;
   case SystemZ::LNDFR:  return SystemZ::LNDBR;

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https://github.com/llvm/llvm-project/pull/78074