[llvm] [AMDGPU][SDAG] Legalise v2i32 or/xor/and instructions to make use of 64-bit wide instructions (PR #140694)

[Chris Jackson via llvm-commits]

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@@ -721,6 +721,18 @@ static bool selectSupportsSourceMods(const SDNode *N) {
   return N->getValueType(0) == MVT::f32;
 }
 
+LLVM_READONLY
+static bool buildVectorSupportsSourceMods(const SDNode *N) {
+  if (N->getValueType(0) != MVT::v2f32)
+    return true;
+
+  if (N->getOperand(0)->getOpcode() != ISD::SELECT ||
+      N->getOperand(1)->getOpcode() != ISD::SELECT)
+    return true;
+
+  return false;
+}
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chrisjbris wrote:

ok, I'll have hasSourceMods() return false for bUILD_VECTOR and add the necessary combines to fix the tests that this breaks.

https://github.com/llvm/llvm-project/pull/140694