Add test case from PR2659.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62006 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/X86/phys_subreg_coalesce-2.ll b/test/CodeGen/X86/phys_subreg_coalesce-2.ll
new file mode 100644
index 0000000000..7ca3ea8e91
--- /dev/null
+++ b/test/CodeGen/X86/phys_subreg_coalesce-2.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep mov | count 5
+; PR2659
+
+define i32 @binomial(i32 %n, i32 %k) nounwind {
+entry:
+	%cmp = icmp ugt i32 %k, %n		; <i1> [#uses=1]
+	br i1 %cmp, label %ifthen, label %forcond.preheader
+
+forcond.preheader:		; preds = %entry
+	%cmp44 = icmp eq i32 %k, 0		; <i1> [#uses=1]
+	br i1 %cmp44, label %afterfor, label %forbody
+
+ifthen:		; preds = %entry
+	ret i32 0
+
+forbody:		; preds = %forbody, %forcond.preheader
+	%indvar = phi i32 [ 0, %forcond.preheader ], [ %divisor.02, %forbody ]		; <i32> [#uses=3]
+	%accumulator.01 = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ]		; <i32> [#uses=1]
+	%divisor.02 = add i32 %indvar, 1		; <i32> [#uses=2]
+	%n.addr.03 = sub i32 %n, %indvar		; <i32> [#uses=1]
+	%mul = mul i32 %n.addr.03, %accumulator.01		; <i32> [#uses=1]
+	%div = udiv i32 %mul, %divisor.02		; <i32> [#uses=2]
+	%inc = add i32 %indvar, 2		; <i32> [#uses=1]
+	%cmp4 = icmp ugt i32 %inc, %k		; <i1> [#uses=1]
+	br i1 %cmp4, label %afterfor, label %forbody
+
+afterfor:		; preds = %forbody, %forcond.preheader
+	%accumulator.0.lcssa = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ]		; <i32> [#uses=1]
+	ret i32 %accumulator.0.lcssa
+}