1 files changed, 26 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/WebAssembly/phi.ll b/llvm/test/CodeGen/WebAssembly/phi.ll
index 13fb5ebc530..24cab2f6607 100644
--- a/llvm/test/CodeGen/WebAssembly/phi.ll
+++ b/llvm/test/CodeGen/WebAssembly/phi.ll
@@ -8,6 +8,8 @@
 target datalayout = "e-p:32:32-i64:64-v128:8:128-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
+; Basic phi triangle.
+
 ; CHECK-LABEL: test0
 ; CHECK: (setlocal [[REG:@.*]] (argument 0))
 ; CHECK: (setlocal [[REG]] (sdiv [[REG]] {{.*}}))
@@ -23,3 +25,27 @@ done:
   %s = phi i32 [ %a, %true ], [ %p, %entry ]
   ret i32 %s
 }
+
+; Swap phis.
+
+; CHECK-LABEL: test1
+; CHECK: BB0_1:
+; CHECK: (setlocal [[REG0:@.*]] [[REG1:@.*]])
+; CHECK: (setlocal [[REG1]] [[REG2:@.*]])
+; CHECK: (setlocal [[REG2]] [[REG0]])
+define i32 @test1(i32 %n) {
+entry:
+  br label %loop
+
+loop:
+  %a = phi i32 [ 0, %entry ], [ %b, %loop ]
+  %b = phi i32 [ 1, %entry ], [ %a, %loop ]
+  %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
+
+  %i.next = add i32 %i, 1
+  %t = icmp slt i32 %i.next, %n
+  br i1 %t, label %loop, label %exit
+
+exit:
+  ret i32 %a
+}