1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2011-06-19-QuicksortCoalescerBug.ll b/test/CodeGen/X86/2011-06-19-QuicksortCoalescerBug.ll
new file mode 100644
index 0000000..08178a3
--- /dev/null
+++ b/test/CodeGen/X86/2011-06-19-QuicksortCoalescerBug.ll
@@ -0,0 +1,31 @@
+; RUN: llc < %s -verify-coalescing
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-macosx10.7.0"
+
+define void @Quicksort(i32* %a, i32 %l, i32 %r) nounwind ssp {
+entry:
+  br label %tailrecurse
+
+tailrecurse:                                      ; preds = %do.cond, %entry
+  %l.tr = phi i32 [ %l, %entry ], [ %i.1, %do.cond ]
+  %r.tr = phi i32 [ %r, %entry ], [ %l.tr, %do.cond ]
+  %idxprom12 = sext i32 %r.tr to i64
+  %arrayidx14 = getelementptr inbounds i32* %a, i64 %idxprom12
+  br label %do.body
+
+do.body:                                          ; preds = %do.cond, %tailrecurse
+  %i.0 = phi i32 [ %l.tr, %tailrecurse ], [ %i.1, %do.cond ]
+  %add7 = add nsw i32 %i.0, 1
+  %cmp = icmp sgt i32 %add7, %r.tr
+  br i1 %cmp, label %do.cond, label %if.then
+
+if.then:                                          ; preds = %do.body
+  store i32 %add7, i32* %arrayidx14, align 4
+  %add16 = add i32 %i.0, 2
+  br label %do.cond
+
+do.cond:                                          ; preds = %do.body, %if.then
+  %i.1 = phi i32 [ %add16, %if.then ], [ %add7, %do.body ]
+  %cmp19 = icmp sgt i32 %i.1, %r.tr
+  br i1 %cmp19, label %tailrecurse, label %do.body
+}