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-rw-r--r--test/Transforms/StructurizeCFG/branch-on-argument.ll47
1 files changed, 47 insertions, 0 deletions
diff --git a/test/Transforms/StructurizeCFG/branch-on-argument.ll b/test/Transforms/StructurizeCFG/branch-on-argument.ll
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--- /dev/null
+++ b/test/Transforms/StructurizeCFG/branch-on-argument.ll
@@ -0,0 +1,47 @@
+; RUN: opt -S -o - -structurizecfg < %s | FileCheck %s
+
+; CHECK-LABEL: @invert_branch_on_arg_inf_loop(
+; CHECK: entry:
+; CHECK: %arg.inv = xor i1 %arg, true
+; CHECK: phi i1 [ false, %Flow1 ], [ %arg.inv, %entry ]
+define void @invert_branch_on_arg_inf_loop(i32 addrspace(1)* %out, i1 %arg) {
+entry:
+ br i1 %arg, label %for.end, label %for.body
+
+for.body: ; preds = %entry, %for.body
+ store i32 999, i32 addrspace(1)* %out, align 4
+ br label %for.body
+
+for.end: ; preds = %Flow
+ ret void
+}
+
+
+; CHECK-LABEL: @invert_branch_on_arg_jump_into_loop(
+; CHECK: entry:
+; CHECK: %arg.inv = xor i1 %arg, true
+; CHECK: Flow:
+; CHECK: Flow1:
+define void @invert_branch_on_arg_jump_into_loop(i32 addrspace(1)* %out, i32 %n, i1 %arg) {
+entry:
+ br label %for.body
+
+for.body:
+ %i = phi i32 [0, %entry], [%i.inc, %end.loop]
+ %ptr = getelementptr i32 addrspace(1)* %out, i32 %i
+ store i32 %i, i32 addrspace(1)* %ptr, align 4
+ br i1 %arg, label %mid.loop, label %end.loop
+
+mid.loop:
+ store i32 333, i32 addrspace(1)* %out, align 4
+ br label %for.end
+
+end.loop:
+ %i.inc = add i32 %i, 1
+ %cmp = icmp ne i32 %i.inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end:
+ ret void
+}
+