From f58e553001537d52e67720156f9280d122cc242d Mon Sep 17 00:00:00 2001
From: Robin Kruppe <robin.kruppe@gmail.com>
Date: Wed, 7 Dec 2016 17:02:34 +0100
Subject: [PATCH] printf type correctness

The %.*s format specifier requires an int for the maximum size, but StringRef::size is a size_t

cc @shepmaster
---
 src/rustllvm/PassWrapper.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index d1eb261abd3..c45d1c2d088 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -533,8 +533,11 @@ LLVMRustPrintPasses() {
             StringRef PassArg = info->getPassArgument();
             StringRef PassName = info->getPassName();
             if (!PassArg.empty()) {
-                printf("%15.*s - %.*s\n", PassArg.size(), PassArg.data(),
-                       PassName.size(), PassName.data());
+                // These unsigned->signed casts could theoretically overflow, but
+                // realistically never will (and even if, the result is implementation
+                // defined rather plain UB).
+                printf("%15.*s - %.*s\n", (int)PassArg.size(), PassArg.data(),
+                       (int)PassName.size(), PassName.data());
             }
 #else
             if (info->getPassArgument() && *info->getPassArgument()) {