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-rw-r--r--lib/Target/README.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 2f6ecfacd1..8cead8e3f0 100644
--- 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.
+
+//===---------------------------------------------------------------------===//