[llvm] [GlobalISel][AArch64] Fix fptoi.sat lowering. (PR #127901)

[Nikita Popov via llvm-commits]

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@@ -7816,13 +7816,13 @@ LegalizerHelper::lowerFPTOINT_SAT(MachineInstr &MI) {
   if (AreExactFloatBounds) {
     // Clamp Src by MinFloat from below. If Src is NaN the result is MinFloat.
     auto MaxC = MIRBuilder.buildFConstant(SrcTy, MinFloat);
-    auto MaxP = MIRBuilder.buildFCmp(CmpInst::FCMP_ULT,
+    auto MaxP = MIRBuilder.buildFCmp(CmpInst::FCMP_UGT,
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nikic wrote:

Should this be OGT? Otherwise we'll select Src if Src is NaN, while we want to select zero.

https://github.com/llvm/llvm-project/pull/127901