Index: lib/Target/ARM/ARMInstrInfo.td
===================================================================
--- lib/Target/ARM/ARMInstrInfo.td
+++ lib/Target/ARM/ARMInstrInfo.td
@@ -3426,7 +3426,8 @@
 def : ARMPat<(ARMadde GPR:$src, so_imm_not:$imm, CPSR),
              (SBCri   GPR:$src, so_imm_not:$imm)>;
 def : ARMPat<(ARMadde GPR:$src, imm0_65535_neg:$imm, CPSR),
-             (SBCrr   GPR:$src, (MOVi16 (imm_not_XFORM imm:$imm)))>;
+             (SBCrr   GPR:$src, (MOVi16 (imm_not_XFORM imm:$imm)))>,
+             Requires<[IsARM, HasV6T2]>;
 
 // Note: These are implemented in C++ code, because they have to generate
 // ADD/SUBrs instructions, which use a complex pattern that a xform function
Index: test/CodeGen/ARM/pr18364-movw.ll
===================================================================
--- /dev/null
+++ test/CodeGen/ARM/pr18364-movw.ll
@@ -0,0 +1,31 @@
+; RUN: llc < %s -mtriple=armv5te | FileCheck %s --check-prefix=V5
+; RUN: llc < %s -mtriple=armv6   | FileCheck %s --check-prefix=V6
+; RUN: llc < %s -mtriple=armv7   | FileCheck %s --check-prefix=V7
+; PR18364
+
+define i64 @f() #0 {
+entry:
+; V5-NOT: movw
+; V6-NOT: movw
+; V7: movw
+  %y = alloca i64, align 8
+  %z = alloca i64, align 8
+  store i64 1, i64* %y, align 8
+  store i64 11579764786944, i64* %z, align 8
+  %0 = load i64* %y, align 8
+  %1 = load i64* %z, align 8
+  %sub = sub i64 %0, %1
+  ret i64 %sub
+}
+
+define i64 @g(i64 %a, i32 %b) #0 {
+entry:
+; V5-NOT: movw
+; V6-NOT: movw
+; V7: movw
+  %0 = mul i64 %a, 86400000
+  %mul = add i64 %0, -210866803200000
+  %conv = sext i32 %b to i64
+  %add = add nsw i64 %mul, %conv
+  ret i64 %add
+}