From ef07cc5e489def0561d45d850d4eeccee723d5db Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 12 Dec 2004 05:52:12 +0000
Subject: [PATCH] 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
---
test/Transforms/GlobalOpt/integer-bool.ll | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 test/Transforms/GlobalOpt/integer-bool.ll
diff --git a/test/Transforms/GlobalOpt/integer-bool.ll b/test/Transforms/GlobalOpt/integer-bool.ll
new file mode 100644
index 00000000000..2daf9550f6e
--- /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
+}