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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34249 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 2f6ecfacd1255b49f08570edd1421fabec32ff90..8cead8e3f03dabf73615528552260cbfe6f14807 100644 (file)
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -415,3 +415,7 @@ when it is declared U32.
 
 //===---------------------------------------------------------------------===//
 
+Promote for i32 bswap can use i64 bswap + shr.  Useful on targets with 64-bit
+regs and bswap, like itanium.
+
+//===---------------------------------------------------------------------===//