New testcase. Shrinking the variable to a bool allows instcombine to delete

the condition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18816 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GlobalOpt/integer-bool.ll b/test/Transforms/GlobalOpt/integer-bool.ll
new file mode 100644 (file)
index 0000000..2daf955
--- /dev/null
+++ b/test/Transforms/GlobalOpt/integer-bool.ll
@@ -0,0 +1,22 @@
+; RUN: llvm-as < %s | opt -globalopt -instcombine | llvm-dis | grep 'ret bool true'
+
+;; check that global opt turns integers that only hold 0 or 1 into bools.
+
+%G = internal global int 0    ;; This only holds 0 or 1.
+
+implementation
+
+void %set1() {
+       store int 0, int* %G
+       ret void
+}
+void %set2() {
+       store int 1, int* %G
+       ret void
+}
+
+bool %get() {
+       %A = load int* %G
+       %C = setlt int %A, 2  ;; always true
+       ret bool %C
+}