Index: lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- lib/Target/X86/X86ISelLowering.cpp
+++ lib/Target/X86/X86ISelLowering.cpp
@@ -37046,6 +37046,12 @@
     SDValue Sum = ShAmt1.getOperand(0);
     if (auto *SumC = dyn_cast<ConstantSDNode>(Sum)) {
       SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
+      if (ShAmt1Op1.getOpcode() == ISD::AND &&
+          isa<ConstantSDNode>(ShAmt1Op1.getOperand(1)) &&
+          ShAmt1Op1.getConstantOperandVal(1) == (Bits - 1)) {
+        ShMsk1 = ShAmt1Op1;
+        ShAmt1Op1 = ShAmt1Op1.getOperand(0);
+      }
       if (ShAmt1Op1.getOpcode() == ISD::TRUNCATE)
         ShAmt1Op1 = ShAmt1Op1.getOperand(0);
       if ((SumC->getAPIntValue() == Bits ||
Index: test/CodeGen/X86/shift-double-x86_64.ll
===================================================================
--- test/CodeGen/X86/shift-double-x86_64.ll
+++ test/CodeGen/X86/shift-double-x86_64.ll
@@ -6,14 +6,10 @@
 define i64 @test1(i64 %hi, i64 %lo, i64 %bits) nounwind {
 ; CHECK-LABEL: test1:
 ; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdx, %rcx
 ; CHECK-NEXT:    movq %rdi, %rax
-; CHECK-NEXT:    movl %edx, %ecx
-; CHECK-NEXT:    andb $63, %cl
-; CHECK-NEXT:    negb %cl
-; CHECK-NEXT:    shrq %cl, %rsi
-; CHECK-NEXT:    movl %edx, %ecx
-; CHECK-NEXT:    shlq %cl, %rax
-; CHECK-NEXT:    orq %rsi, %rax
+; CHECK-NEXT:    # kill: def $cl killed $cl killed $rcx
+; CHECK-NEXT:    shldq %cl, %rsi, %rax
 ; CHECK-NEXT:    retq
   %and = and i64 %bits, 63
   %and64 = sub i64 64, %and
@@ -26,14 +22,10 @@
 define i64 @test2(i64 %hi, i64 %lo, i64 %bits) nounwind {
 ; CHECK-LABEL: test2:
 ; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdx, %rcx
 ; CHECK-NEXT:    movq %rsi, %rax
-; CHECK-NEXT:    movl %edx, %ecx
-; CHECK-NEXT:    andb $63, %cl
-; CHECK-NEXT:    negb %cl
-; CHECK-NEXT:    shlq %cl, %rdi
-; CHECK-NEXT:    movl %edx, %ecx
-; CHECK-NEXT:    shrq %cl, %rax
-; CHECK-NEXT:    orq %rdi, %rax
+; CHECK-NEXT:    # kill: def $cl killed $cl killed $rcx
+; CHECK-NEXT:    shrdq %cl, %rdi, %rax
 ; CHECK-NEXT:    retq
   %and = and i64 %bits, 63
   %and64 = sub i64 64, %and
Index: test/CodeGen/X86/shift-double.ll
===================================================================
--- test/CodeGen/X86/shift-double.ll
+++ test/CodeGen/X86/shift-double.ll
@@ -286,30 +286,18 @@
 define i32 @test11(i32 %hi, i32 %lo, i32 %bits) nounwind {
 ; X86-LABEL: test11:
 ; X86:       # %bb.0:
-; X86-NEXT:    pushl %esi
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %cl
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
-; X86-NEXT:    movb {{[0-9]+}}(%esp), %dl
-; X86-NEXT:    movl %edx, %ecx
-; X86-NEXT:    andb $31, %cl
-; X86-NEXT:    negb %cl
-; X86-NEXT:    shrl %cl, %esi
-; X86-NEXT:    movl %edx, %ecx
-; X86-NEXT:    shll %cl, %eax
-; X86-NEXT:    orl %esi, %eax
-; X86-NEXT:    popl %esi
+; X86-NEXT:    shldl %cl, %edx, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: test11:
 ; X64:       # %bb.0:
-; X64-NEXT:    movl %edi, %eax
-; X64-NEXT:    movl %edx, %ecx
-; X64-NEXT:    andb $31, %cl
-; X64-NEXT:    negb %cl
-; X64-NEXT:    shrl %cl, %esi
 ; X64-NEXT:    movl %edx, %ecx
-; X64-NEXT:    shll %cl, %eax
-; X64-NEXT:    orl %esi, %eax
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    # kill: def $cl killed $cl killed $ecx
+; X64-NEXT:    shldl %cl, %esi, %eax
 ; X64-NEXT:    retq
   %and = and i32 %bits, 31
   %and32 = sub i32 32, %and
@@ -322,30 +310,18 @@
 define i32 @test12(i32 %hi, i32 %lo, i32 %bits) nounwind {
 ; X86-LABEL: test12:
 ; X86:       # %bb.0:
-; X86-NEXT:    pushl %esi
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %cl
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
-; X86-NEXT:    movb {{[0-9]+}}(%esp), %dl
-; X86-NEXT:    movl %edx, %ecx
-; X86-NEXT:    andb $31, %cl
-; X86-NEXT:    negb %cl
-; X86-NEXT:    shll %cl, %esi
-; X86-NEXT:    movl %edx, %ecx
-; X86-NEXT:    shrl %cl, %eax
-; X86-NEXT:    orl %esi, %eax
-; X86-NEXT:    popl %esi
+; X86-NEXT:    shrdl %cl, %edx, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: test12:
 ; X64:       # %bb.0:
-; X64-NEXT:    movl %esi, %eax
-; X64-NEXT:    movl %edx, %ecx
-; X64-NEXT:    andb $31, %cl
-; X64-NEXT:    negb %cl
-; X64-NEXT:    shll %cl, %edi
 ; X64-NEXT:    movl %edx, %ecx
-; X64-NEXT:    shrl %cl, %eax
-; X64-NEXT:    orl %edi, %eax
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    # kill: def $cl killed $cl killed $ecx
+; X64-NEXT:    shrdl %cl, %edi, %eax
 ; X64-NEXT:    retq
   %and = and i32 %bits, 31
   %and32 = sub i32 32, %and