[CodeGen] Unify MBB reference format in both MIR and debug output

As part of the unification of the debug format and the MIR format, print
MBB references as '%bb.5'.

The MIR printer prints the IR name of a MBB only for block definitions.

* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g'
* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g'
* find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g'
* grep -nr 'BB#' and fix

Differential Revision: https://reviews.llvm.org/D40422

llvm-svn: 319665
diff --git a/llvm/test/CodeGen/X86/sqrt-partial.ll b/llvm/test/CodeGen/X86/sqrt-partial.ll
index a7d4ef2..6f0d524 100644
--- a/llvm/test/CodeGen/X86/sqrt-partial.ll
+++ b/llvm/test/CodeGen/X86/sqrt-partial.ll
@@ -10,11 +10,11 @@
 
 define float @f(float %val) nounwind {
 ; CHECK-LABEL: f:
-; CHECK:       # BB#0:
+; CHECK:       # %bb.0:
 ; CHECK-NEXT:    xorps %xmm1, %xmm1
 ; CHECK-NEXT:    ucomiss %xmm1, %xmm0
 ; CHECK-NEXT:    jb .LBB0_2
-; CHECK-NEXT:  # BB#1: # %.split
+; CHECK-NEXT:  # %bb.1: # %.split
 ; CHECK-NEXT:    sqrtss %xmm0, %xmm0
 ; CHECK-NEXT:    retq
 ; CHECK-NEXT:  .LBB0_2: # %call.sqrt
@@ -25,11 +25,11 @@
 
 define double @d(double %val) nounwind {
 ; CHECK-LABEL: d:
-; CHECK:       # BB#0:
+; CHECK:       # %bb.0:
 ; CHECK-NEXT:    xorps %xmm1, %xmm1
 ; CHECK-NEXT:    ucomisd %xmm1, %xmm0
 ; CHECK-NEXT:    jb .LBB1_2
-; CHECK-NEXT:  # BB#1: # %.split
+; CHECK-NEXT:  # %bb.1: # %.split
 ; CHECK-NEXT:    sqrtsd %xmm0, %xmm0
 ; CHECK-NEXT:    retq
 ; CHECK-NEXT:  .LBB1_2: # %call.sqrt