Index: include/llvm/Support/BranchProbability.h
===================================================================
--- include/llvm/Support/BranchProbability.h
+++ include/llvm/Support/BranchProbability.h
@@ -70,6 +70,7 @@
   BranchProbability getCompl() const { return BranchProbability(D - N); }
 
   raw_ostream &print(raw_ostream &OS) const;
+  raw_ostream &printRaw(raw_ostream &OS) const;
 
   void dump() const;
 
Index: lib/CodeGen/MIRPrinter.cpp
===================================================================
--- lib/CodeGen/MIRPrinter.cpp
+++ lib/CodeGen/MIRPrinter.cpp
@@ -480,8 +480,11 @@
       if (I != MBB.succ_begin())
         OS << ", ";
       printMBBReference(**I);
-      if (MBB.hasSuccessorProbabilities())
-        OS << '(' << MBB.getSuccProbability(I) << ')';
+      if (MBB.hasSuccessorProbabilities()) {
+        OS << '(';
+        MBB.getSuccProbability(I).printRaw(OS);
+        OS << ')';
+      }
     }
     OS << "\n";
     HasLineAttributes = true;
Index: lib/Support/BranchProbability.cpp
===================================================================
--- lib/Support/BranchProbability.cpp
+++ lib/Support/BranchProbability.cpp
@@ -34,6 +34,10 @@
 
 LLVM_DUMP_METHOD void BranchProbability::dump() const { print(dbgs()) << '\n'; }
 
+raw_ostream &BranchProbability::printRaw(raw_ostream &OS) const {
+  return OS << N;
+}
+
 BranchProbability::BranchProbability(uint32_t Numerator, uint32_t Denominator) {
   assert(Denominator > 0 && "Denominator cannot be 0!");
   assert(Numerator <= Denominator && "Probability cannot be bigger than 1!");
Index: test/CodeGen/MIR/Generic/branch-probabilities.ll
===================================================================
--- /dev/null
+++ test/CodeGen/MIR/Generic/branch-probabilities.ll
@@ -0,0 +1,26 @@
+; RUN: llc -stop-after machine-sink %s -o %t.mir
+; RUN: FileCheck %s < %t.mir
+; RUN: llc %t.mir -run-pass machine-sink
+; Check that branch probabilities are printed in a format that can then be parsed.
+
+declare void @foo()
+declare void @bar()
+
+define void @test(i1 %c) {
+; CHECK-LABEL: name: test
+entry:
+        br i1 %c, label %then, label %else
+
+then:
+        call void @foo()
+        br label %end
+; CHECK: successors: %{{[a-z0-9\-\.]+}}({{[0-9]+}}), %{{[a-z0-9\-\.]+}}({{[0-9]+}})
+
+else:
+        call void @bar()
+        br label %end
+; CHECK: successors: %{{[a-z0-9\-\.]+}}({{[0-9]+}})
+
+end:
+        ret void
+}
Index: test/CodeGen/MIR/X86/newline-handling.mir
===================================================================
--- test/CodeGen/MIR/X86/newline-handling.mir
+++ test/CodeGen/MIR/X86/newline-handling.mir
@@ -35,7 +35,7 @@
 # CHECK-LABEL: name: foo
 # CHECK: body: |
 # CHECK-NEXT: bb.0.entry:
-# CHECK-NEXT: successors: %bb.1.less(0x40000000 / 0x80000000 = 50.00%), %bb.2.exit(0x40000000 / 0x80000000 = 50.00%)
+# CHECK-NEXT: successors: %bb.1.less(1073741824), %bb.2.exit(1073741824)
 # CHECK-NEXT: liveins: %edi
 # CHECK:      CMP32ri8 %edi, 10, implicit-def %eflags
 # CHECK-NEXT: JG_1 %bb.2.exit, implicit killed %eflags
@@ -79,7 +79,7 @@
 # CHECK-LABEL: name: bar
 # CHECK: body: |
 # CHECK-NEXT: bb.0.entry:
-# CHECK-NEXT: successors: %bb.1.less(0x40000000 / 0x80000000 = 50.00%), %bb.2.exit(0x40000000 / 0x80000000 = 50.00%)
+# CHECK-NEXT: successors: %bb.1.less(1073741824), %bb.2.exit(1073741824)
 # CHECK-NEXT: liveins: %edi
 # CHECK:      CMP32ri8 %edi, 10, implicit-def %eflags
 # CHECK-NEXT: JG_1 %bb.2.exit, implicit killed %eflags
Index: test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir
===================================================================
--- test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir
+++ test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir
@@ -21,7 +21,7 @@
 name:            foo
 body: |
   ; CHECK-LABEL: bb.0.entry:
-  ; CHECK:         successors: %bb.1.less({{[0-9a-fx/= ]+}}33.00%), %bb.2.exit({{[0-9a-fx/= ]+}}67.00%)
+  ; CHECK:         successors: %bb.1.less(708669604), %bb.2.exit(1438814044)
   ; CHECK-LABEL: bb.1.less:
   bb.0.entry:
     successors: %bb.1.less (33), %bb.2.exit(67)
Index: test/CodeGen/MIR/X86/successor-basic-blocks.mir
===================================================================
--- test/CodeGen/MIR/X86/successor-basic-blocks.mir
+++ test/CodeGen/MIR/X86/successor-basic-blocks.mir
@@ -32,7 +32,7 @@
 name:            foo
 body: |
   ; CHECK-LABEL: bb.0.entry:
-  ; CHECK:         successors: %bb.1.less(0x40000000 / 0x80000000 = 50.00%), %bb.2.exit(0x40000000 / 0x80000000 = 50.00%)
+  ; CHECK:         successors: %bb.1.less(1073741824), %bb.2.exit(1073741824)
   ; CHECK-LABEL: bb.1.less:
   bb.0.entry:
     successors: %bb.1.less, %bb.2.exit
@@ -58,7 +58,7 @@
   ; Verify that we can have multiple lists of successors that will be merged
   ; into one.
   ; CHECK-LABEL: bb.0.entry:
-  ; CHECK:         successors: %bb.1(0x80000000 / 0x80000000 = 100.00%), %bb.2(0x00000000 / 0x80000000 = 0.00%)
+  ; CHECK:         successors: %bb.1(2147483648), %bb.2(0)
   bb.0.entry:
     liveins: %edi
     successors: %bb.1