[llvm-mca][UpdateTestChecks] Don't try to align blocks that have already been subject to alignment in update_mca_test_checks.py
This fixes PR39466.
llvm-svn: 345499
diff --git a/llvm/utils/update_mca_test_checks.py b/llvm/utils/update_mca_test_checks.py
index a83186c..54d1cb4 100755
--- a/llvm/utils/update_mca_test_checks.py
+++ b/llvm/utils/update_mca_test_checks.py
@@ -267,10 +267,14 @@
continue
changed = False
- while(index < farthest_indexes[block]):
- blocks.insert(index, '')
- index += 1
- changed = True
+ # If the block has not already been subject to alignment (i.e. if the
+ # previous block is not empty) then insert empty blocks until the index
+ # matches the farthest index identified for that block.
+ if (index > 0) and blocks[index - 1]:
+ while(index < farthest_indexes[block]):
+ blocks.insert(index, '')
+ index += 1
+ changed = True
if changed:
# Bail out. We'll need to re-do the farthest block analysis now that