diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 7e3c33bb9fbc..b140fc6d7e98 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -2495,8 +2495,8 @@ static bool tryPressure(const PressureChange &TryP,
   }
   // If one candidate decreases and the other increases, go with it.
   // Invalid candidates have UnitInc==0.
-  if (tryLess(TryP.getUnitInc() < 0, CandP.getUnitInc() < 0, TryCand, Cand,
-              Reason)) {
+  if (tryGreater(TryP.getUnitInc() < 0, CandP.getUnitInc() < 0, TryCand, Cand,
+                 Reason)) {
     return true;
   }
   // If the candidates are decreasing pressure, reverse priority.
diff --git a/llvm/test/CodeGen/X86/misched-matmul.ll b/llvm/test/CodeGen/X86/misched-matmul.ll
index 3ea6512258d4..5454b7cf780a 100644
--- a/llvm/test/CodeGen/X86/misched-matmul.ll
+++ b/llvm/test/CodeGen/X86/misched-matmul.ll
@@ -10,7 +10,7 @@
 ; more complex cases.
 ;
 ; CHECK: @wrap_mul4
-; CHECK: 22 regalloc - Number of spills inserted
+; CHECK: 23 regalloc - Number of spills inserted
 
 define void @wrap_mul4(double* nocapture %Out, [4 x double]* nocapture %A, [4 x double]* nocapture %B) #0 {
 entry:
diff --git a/llvm/test/CodeGen/X86/ragreedy-last-chance-recoloring.ll b/llvm/test/CodeGen/X86/ragreedy-last-chance-recoloring.ll
index d8e45727b9d2..49d58f437c21 100644
--- a/llvm/test/CodeGen/X86/ragreedy-last-chance-recoloring.ll
+++ b/llvm/test/CodeGen/X86/ragreedy-last-chance-recoloring.ll
@@ -2,10 +2,12 @@
 ; Without the last chance recoloring, this test fails with:
 ; "ran out of registers".
 
-; RUN: not llc -regalloc=greedy -relocation-model=pic -lcr-max-depth=0  < %s 2>&1 | FileCheck %s --check-prefix=CHECK-DEPTH
+; NOTE: With the fix to PR18883, we don't actually run out of registers here
+; any more, and so those checks are disabled. This test remains only for general coverage.
+; XXX: not llc -regalloc=greedy -relocation-model=pic -lcr-max-depth=0  < %s 2>&1 | FileCheck %s --check-prefix=CHECK-DEPTH
 ; Test whether failure due to cutoff for depth is reported
 
-; RUN: not llc -regalloc=greedy -relocation-model=pic -lcr-max-interf=1  < %s 2>&1 | FileCheck %s --check-prefix=CHECK-INTERF
+; XXX: not llc -regalloc=greedy -relocation-model=pic -lcr-max-interf=1  < %s 2>&1 | FileCheck %s --check-prefix=CHECK-INTERF
 ; Test whether failure due to cutoff for interference is reported
 
 ; RUN: llc -regalloc=greedy -relocation-model=pic -lcr-max-interf=1 -lcr-max-depth=0 -exhaustive-register-search < %s > %t 2>&1