diff options
| author | Eli Friedman <efriedma@codeaurora.org> | 2017-12-22 02:08:08 +0000 |
|---|---|---|
| committer | Eli Friedman <efriedma@codeaurora.org> | 2017-12-22 02:08:08 +0000 |
| commit | fcc597840cc32b4599e41fcad5dd1ef4cb8f2259 (patch) | |
| tree | 52c4f13f1458d67087a44943c53d5ba33927551d /include | |
| parent | fe7b9dc2d2f3e45cfd91a4311de446431fcea8d2 (diff) | |
[Inliner] Restrict soft-float inlining penalty.
The penalty is currently getting applied in a bunch of places where it
doesn't make sense, like bitcasts (which are free) and calls (which
were getting the call penalty applied twice). Instead, just apply the
penalty to binary operators and floating-point casts.
While I'm here, also fix getFPOpCost() to do the right thing in more
cases, so we don't have to dig into function attributes.
Differential Revision: https://reviews.llvm.org/D41522
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321332 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/BasicTTIImpl.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/llvm/CodeGen/BasicTTIImpl.h b/include/llvm/CodeGen/BasicTTIImpl.h index bb5e7f9e8e30..526ddb1b9706 100644 --- a/include/llvm/CodeGen/BasicTTIImpl.h +++ b/include/llvm/CodeGen/BasicTTIImpl.h @@ -302,9 +302,13 @@ public: } unsigned getFPOpCost(Type *Ty) { - // By default, FP instructions are no more expensive since they are - // implemented in HW. Target specific TTI can override this. - return TargetTransformInfo::TCC_Basic; + // Check whether FADD is available, as a proxy for floating-point in + // general. + const TargetLoweringBase *TLI = getTLI(); + EVT VT = TLI->getValueType(DL, Ty); + if (TLI->isOperationLegalOrCustomOrPromote(ISD::FADD, VT)) + return TargetTransformInfo::TCC_Basic; + return TargetTransformInfo::TCC_Expensive; } unsigned getOperationCost(unsigned Opcode, Type *Ty, Type *OpTy) { |