Expand and rewrite comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189998 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/swift-vldm.ll b/test/CodeGen/ARM/swift-vldm.ll
index 582a04066f46a1af5580fe1e54cafa77122135ec..67ae00ad7db86ff0438db6f40aa7c0cb35c92880 100644 (file)
--- a/test/CodeGen/ARM/swift-vldm.ll
+++ b/test/CodeGen/ARM/swift-vldm.ll
@@ -1,7 +1,8 @@
 ; RUN: llc < %s -mcpu=swift -mtriple=armv7s-apple-ios | FileCheck %s
 
-; vldm with registers not aligned with q registers need more micro-ops so that
-; so that there usage becomes unbeneficial on swift.
+; Check that we avoid producing vldm instructions using d registers that
+; begin in the most-significant half of a q register. These require more
+; micro-ops on swift and so aren't worth combining.
 
 ; CHECK-LABEL: test_vldm
 ; CHECK: vldmia r{{[0-9]+}}, {d2, d3, d4}
@@ -19,7 +20,7 @@ entry:
   %d2 = load double * %addr1
   %d3 = load double * %addr2
   %d4 = load double * %addr3
-  ; We are trying to force x[0-3] in register d1 to d4 so that we can test we
+  ; We are trying to force x[0-3] in registers d1 to d4 so that we can test we
   ; don't form a "vldmia rX, {d1, d2, d3, d4}".
   ; We are relying on the calling convention and that register allocation
   ; properly coalesces registers.