[CostModel][X86] Reordered SSE42 arithmetic cost LUT into descending order. NFCI.
llvm-svn: 291162
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
index a4a040f..8a98501 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -383,19 +383,6 @@
return LT.first * Entry->Cost;
}
- static const CostTblEntry SSE42FloatCostTable[] = {
- { ISD::FDIV, MVT::f32, 14 }, // Nehalem from http://www.agner.org/
- { ISD::FDIV, MVT::v4f32, 14 }, // Nehalem from http://www.agner.org/
- { ISD::FDIV, MVT::f64, 22 }, // Nehalem from http://www.agner.org/
- { ISD::FDIV, MVT::v2f64, 22 }, // Nehalem from http://www.agner.org/
- };
-
- if (ST->hasSSE42()) {
- if (const auto *Entry = CostTableLookup(SSE42FloatCostTable, ISD,
- LT.second))
- return LT.first * Entry->Cost;
- }
-
static const CostTblEntry
SSE2UniformCostTable[] = {
// Uniform splats are cheaper for the following instructions.
@@ -457,6 +444,17 @@
ISD = ISD::MUL;
}
+ static const CostTblEntry SSE42CostTable[] = {
+ { ISD::FDIV, MVT::f32, 14 }, // Nehalem from http://www.agner.org/
+ { ISD::FDIV, MVT::v4f32, 14 }, // Nehalem from http://www.agner.org/
+ { ISD::FDIV, MVT::f64, 22 }, // Nehalem from http://www.agner.org/
+ { ISD::FDIV, MVT::v2f64, 22 }, // Nehalem from http://www.agner.org/
+ };
+
+ if (ST->hasSSE42())
+ if (const auto *Entry = CostTableLookup(SSE42CostTable, ISD, LT.second))
+ return LT.first * Entry->Cost;
+
static const CostTblEntry SSE41CostTable[] = {
{ ISD::SHL, MVT::v16i8, 11 }, // pblendvb sequence.
{ ISD::SHL, MVT::v32i8, 2*11 }, // pblendvb sequence.