[Hexagon] Shrink-wrap stack frame (Hexagon-specific)

[oota-llvm.git] / test / CodeGen / Hexagon / shrink-frame-basic.ll

diff --git a/test/CodeGen/Hexagon/shrink-frame-basic.ll b/test/CodeGen/Hexagon/shrink-frame-basic.ll
new file mode 100644 (file)
index 0000000..50b3788
--- /dev/null
+++ b/test/CodeGen/Hexagon/shrink-frame-basic.ll
@@ -0,0 +1,36 @@
+; RUN: llc < %s | FileCheck %s
+; Check for allocframe in a non-entry block LBB0_n.
+; CHECK: LBB0_{{[0-9]+}}:
+; CHECK:   allocframe
+; Deallocframe may be in a different block, but must follow.
+; CHECK: deallocframe
+
+target datalayout = "e-m:e-p:32:32-i1:32-i64:64-a:0-v32:32-n16:32"
+target triple = "hexagon"
+
+; Function Attrs: nounwind
+define i32 @foo(i32 %n, i32* %p) #0 {
+entry:
+  %cmp = icmp eq i32* %p, null
+  br i1 %cmp, label %if.end, label %if.then
+
+if.then:                                          ; preds = %entry
+  %0 = load i32, i32* %p, align 4
+  %inc = add nsw i32 %0, 1
+  store i32 %inc, i32* %p, align 4
+  br label %return
+
+if.end:                                           ; preds = %entry
+  %call = tail call i32 bitcast (i32 (...)* @bar to i32 (i32)*)(i32 %n) #0
+  %add = add nsw i32 %call, 1
+  br label %return
+
+return:                                           ; preds = %if.end, %if.then
+  %retval.0 = phi i32 [ %0, %if.then ], [ %add, %if.end ]
+  ret i32 %retval.0
+}
+
+declare i32 @bar(...) #0
+
+attributes #0 = { nounwind }
+