[llvm] AMDGPU: Handle invariant when lowering global loads (PR #168914)

[Matt Arsenault via llvm-commits]

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@@ -11944,7 +11944,7 @@ SDValue SITargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
       AS == AMDGPUAS::CONSTANT_ADDRESS_32BIT ||
       (AS == AMDGPUAS::GLOBAL_ADDRESS &&
        Subtarget->getScalarizeGlobalBehavior() && Load->isSimple() &&
-       isMemOpHasNoClobberedMemOperand(Load))) {
+       (Load->isInvariant() || isMemOpHasNoClobberedMemOperand(Load)))) {
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arsenm wrote:

No, there was in the test from https://github.com/llvm/llvm-project/pull/168913 but it turned out to be restoring a regression from one of the later patches 

https://github.com/llvm/llvm-project/pull/168914