From 60efc6893197cdf1c39e9f39686d4ee3c0686ef2 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <jolesen@mozilla.com>
Date: Wed, 5 Jul 2017 14:22:34 -0700
Subject: [PATCH] Only print pressure for toprcs containing registers.

Many ISAs don't need 4 top-level register classes, so don't print them.
---
 lib/cretonne/src/regalloc/pressure.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/cretonne/src/regalloc/pressure.rs b/lib/cretonne/src/regalloc/pressure.rs
index 3bf1e68f54..fd9cf7c363 100644
--- a/lib/cretonne/src/regalloc/pressure.rs
+++ b/lib/cretonne/src/regalloc/pressure.rs
@@ -238,7 +238,9 @@ impl fmt::Display for Pressure {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "Pressure[")?;
         for rc in &self.toprc {
-            write!(f, " {}+{}/{}", rc.base_count, rc.transient_count, rc.limit)?;
+            if rc.limit > 0 {
+                write!(f, " {}+{}/{}", rc.base_count, rc.transient_count, rc.limit)?;
+            }
         }
         write!(f, " ]")
     }