Minor simplification to 64-bit instsel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6831 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp
index 729ab7acc8e78892eb1649f2adcd7f6718838f88..a7c3c648c8b1a57217fc9051688e68e081e649f5 100644 (file)
--- a/lib/Target/X86/InstSelectSimple.cpp
+++ b/lib/Target/X86/InstSelectSimple.cpp
@@ -1116,16 +1116,16 @@ void ISel::visitMul(BinaryOperator &I) {
     BuildMI(BB, X86::MOVrr32, 1, OverflowReg).addReg(X86::EDX); // AL*BL >> 32
 
     MachineBasicBlock::iterator MBBI = BB->end();
-    unsigned AHBLReg = makeAnotherReg(Type::UIntTy);
-    doMultiply(BB, MBBI, AHBLReg, Type::UIntTy, Op0Reg+1, Op1Reg); // AH*BL
+    unsigned AHBLReg = makeAnotherReg(Type::UIntTy);   // AH*BL
+    BMI(BB, MBBI, X86::IMULr32, 2, AHBLReg).addReg(Op0Reg+1).addReg(Op1Reg);
 
     unsigned AHBLplusOverflowReg = makeAnotherReg(Type::UIntTy);
     BuildMI(BB, X86::ADDrr32, 2,                         // AH*BL+(AL*BL >> 32)
            AHBLplusOverflowReg).addReg(AHBLReg).addReg(OverflowReg);
     
     MBBI = BB->end();
-    unsigned ALBHReg = makeAnotherReg(Type::UIntTy);
-    doMultiply(BB, MBBI, ALBHReg, Type::UIntTy, Op0Reg, Op1Reg+1); // AL*BH
+    unsigned ALBHReg = makeAnotherReg(Type::UIntTy); // AL*BH
+    BMI(BB, MBBI, X86::IMULr32, 2, ALBHReg).addReg(Op0Reg).addReg(Op1Reg+1);
     
     BuildMI(BB, X86::ADDrr32, 2,               // AL*BH + AH*BL + (AL*BL >> 32)
            DestReg+1).addReg(AHBLplusOverflowReg).addReg(ALBHReg);

diff --git a/lib/Target/X86/X86ISelSimple.cpp b/lib/Target/X86/X86ISelSimple.cpp
index 729ab7acc8e78892eb1649f2adcd7f6718838f88..a7c3c648c8b1a57217fc9051688e68e081e649f5 100644 (file)
--- a/lib/Target/X86/X86ISelSimple.cpp
+++ b/lib/Target/X86/X86ISelSimple.cpp
@@ -1116,16 +1116,16 @@ void ISel::visitMul(BinaryOperator &I) {
     BuildMI(BB, X86::MOVrr32, 1, OverflowReg).addReg(X86::EDX); // AL*BL >> 32
 
     MachineBasicBlock::iterator MBBI = BB->end();
-    unsigned AHBLReg = makeAnotherReg(Type::UIntTy);
-    doMultiply(BB, MBBI, AHBLReg, Type::UIntTy, Op0Reg+1, Op1Reg); // AH*BL
+    unsigned AHBLReg = makeAnotherReg(Type::UIntTy);   // AH*BL
+    BMI(BB, MBBI, X86::IMULr32, 2, AHBLReg).addReg(Op0Reg+1).addReg(Op1Reg);
 
     unsigned AHBLplusOverflowReg = makeAnotherReg(Type::UIntTy);
     BuildMI(BB, X86::ADDrr32, 2,                         // AH*BL+(AL*BL >> 32)
            AHBLplusOverflowReg).addReg(AHBLReg).addReg(OverflowReg);
     
     MBBI = BB->end();
-    unsigned ALBHReg = makeAnotherReg(Type::UIntTy);
-    doMultiply(BB, MBBI, ALBHReg, Type::UIntTy, Op0Reg, Op1Reg+1); // AL*BH
+    unsigned ALBHReg = makeAnotherReg(Type::UIntTy); // AL*BH
+    BMI(BB, MBBI, X86::IMULr32, 2, ALBHReg).addReg(Op0Reg).addReg(Op1Reg+1);
     
     BuildMI(BB, X86::ADDrr32, 2,               // AL*BH + AH*BL + (AL*BL >> 32)
            DestReg+1).addReg(AHBLplusOverflowReg).addReg(ALBHReg);