[llvm] [AMDGPU] Handle negated f16 and fp conversion DAG combines (PR #213202)

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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index e26836f19..09b99f264 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -790,9 +790,9 @@ bool AMDGPUTargetLowering::allUsesHaveSourceMods(const SDNode *N,
 
   // XXX - Should this limit number of uses to check?
   for (const SDNode *U : N->users()) {
-    if(U->getOpcode() == ISD::BITCAST && N->getOpcode() == ISD::FP_TO_FP16) {
-      for(const SDNode *BU : U->users()) {
-        if(!hasSourceMods(BU)) {
+    if (U->getOpcode() == ISD::BITCAST && N->getOpcode() == ISD::FP_TO_FP16) {
+      for (const SDNode *BU : U->users()) {
+        if (!hasSourceMods(BU)) {
           return false;
         }
 
@@ -981,7 +981,7 @@ SDValue AMDGPUTargetLowering::getNegatedExpression(
     EVT SrcVT = Src.getValueType();
     SDLoc SL(Op);
 
-    if(Src->getOpcode() == ISD::FNEG) {
+    if (Src->getOpcode() == ISD::FNEG) {
       Cost = NegatibleCost::Cheaper;
       // Negative of Negative is the Source Operand itself
       // -(FP_TO_FP16(FNEG(X)) = FP_TO_FP16(X)

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https://github.com/llvm/llvm-project/pull/213202