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Cost Model: teach the cost model about expanding integers.

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llvm-svn: 167401
This commit is contained in:
Nadav Rotem 2012-11-05 21:11:10 +00:00
parent 45466ea079
commit a504aa057e
2 changed files with 12 additions and 2 deletions
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5
lib/Target/TargetTransformImpl.cpp
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@ -143,7 +143,8 @@ VectorTargetTransformImpl::getTypeLegalizationCost(LLVMContext &C,
if (LK.first == TargetLowering::TypeLegal)
return std::make_pair(Cost, Ty.getSimpleVT());
if (LK.first == TargetLowering::TypeSplitVector)
if (LK.first == TargetLowering::TypeSplitVector ||
LK.first == TargetLowering::TypeExpandInteger)
Cost *= 2;
// Keep legalizing the type.
@ -300,7 +301,7 @@ unsigned VectorTargetTransformImpl::getCmpSelInstrCost(unsigned Opcode,
unsigned Cost = getCmpSelInstrCost(Opcode, ValTy->getScalarType(),
CondTy);
// return the cost of multiple scalar invocation plus the cost of inserting
// Return the cost of multiple scalar invocation plus the cost of inserting
// and extracting the values.
return getScalarizationOverhead(ValTy, true, false) + Num * Cost;
}

9
test/Analysis/CostModel/X86/i32.ll Normal file
View File

@ -0,0 +1,9 @@
; RUN: opt < %s -cost-model -analyze -mtriple=i386 -mcpu=corei7-avx | FileCheck %s
;CHECK: cost of 2 {{.*}} add
;CHECK: cost of 1 {{.*}} ret
define i32 @no_info(i32 %arg) {
%e = add i64 undef, undef
ret i32 undef
}