[llvm] [RISCV][GISel] Lower G_ABDS and G_ABDU (PR #155888)
Craig Topper via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 4 09:56:03 PDT 2025
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@@ -4742,6 +4755,18 @@ LegalizerHelper::lower(MachineInstr &MI, unsigned TypeIdx, LLT LowerHintTy) {
return lowerShlSat(MI);
case G_ABS:
return lowerAbsToAddXor(MI);
+ case G_ABDS: {
+ LLT Ty = MRI.getType(MI.getOperand(0).getReg());
+ if (LI.isLegal({G_SMIN, Ty}) && LI.isLegal({G_SMAX, Ty}))
+ return lowerAbsDiffToMinMax(MI);
+ }
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topperc wrote:
Move the closing brace after `return lowerAbsDiffToSelect`
https://github.com/llvm/llvm-project/pull/155888
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