diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 578e2cc7ff..a78c69811a 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -5377,25 +5377,55 @@ static SDOperand PerformSELECTCombine(SDNode *N, SelectionDAG &DAG, unsigned IntNo = 0; if (LHS == Cond.getOperand(0) && RHS == Cond.getOperand(1)) { - // (X olt Y) ? X : Y -> min - if (CC == ISD::SETOLT || CC == ISD::SETLT) + switch (CC) { + default: break; + case ISD::SETOLE: // (X <= Y) ? X : Y -> min + case ISD::SETULE: + case ISD::SETLE: + if (!UnsafeFPMath) break; + // FALL THROUGH. + case ISD::SETOLT: // (X olt/lt Y) ? X : Y -> min + case ISD::SETLT: IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_min_ss : Intrinsic::x86_sse2_min_sd; - // (X uge Y) ? X : Y -> max - if (CC == ISD::SETUGE || CC == ISD::SETGE) + break; + + case ISD::SETOGT: // (X > Y) ? X : Y -> max + case ISD::SETUGT: + case ISD::SETGT: + if (!UnsafeFPMath) break; + // FALL THROUGH. + case ISD::SETUGE: // (X uge/ge Y) ? X : Y -> max + case ISD::SETGE: IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_max_ss : - Intrinsic::x86_sse2_max_sd; - // TODO: Handle more cases if unsafe math! + Intrinsic::x86_sse2_max_sd; + break; + } } else if (LHS == Cond.getOperand(1) && RHS == Cond.getOperand(0)) { - // (X uge Y) ? Y : X -> min - if (CC == ISD::SETUGE || CC == ISD::SETGE) + switch (CC) { + default: break; + case ISD::SETOGT: // (X > Y) ? Y : X -> min + case ISD::SETUGT: + case ISD::SETGT: + if (!UnsafeFPMath) break; + // FALL THROUGH. + case ISD::SETUGE: // (X uge/ge Y) ? Y : X -> min + case ISD::SETGE: IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_min_ss : - Intrinsic::x86_sse2_min_sd; - // (X olt Y) ? Y : X -> max - if (CC == ISD::SETOLT || CC == ISD::SETLT) + Intrinsic::x86_sse2_min_sd; + break; + + case ISD::SETOLE: // (X <= Y) ? Y : X -> max + case ISD::SETULE: + case ISD::SETLE: + if (!UnsafeFPMath) break; + // FALL THROUGH. + case ISD::SETOLT: // (X olt/lt Y) ? Y : X -> max + case ISD::SETLT: IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_max_ss : - Intrinsic::x86_sse2_max_sd; - // TODO: Handle more cases if unsafe math! + Intrinsic::x86_sse2_max_sd; + break; + } } // minss/maxss take a v4f32 operand. |