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authorChris Lattner <sabre@nondot.org>2009-06-19 16:27:56 +0000
committerChris Lattner <sabre@nondot.org>2009-06-19 16:27:56 +0000
commit79c740ff479dde322aceafe15887b162c19ea195 (patch)
treef6b26a86189dfd514ac17b434196827114fcb763 /test/Transforms/JumpThreading
parent225503a5b5de954788ad1e4bc9c69211de334c05 (diff)
downloadexternal_llvm-79c740ff479dde322aceafe15887b162c19ea195.zip
external_llvm-79c740ff479dde322aceafe15887b162c19ea195.tar.gz
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make jump threading handle lexically identical compare instructions
as if they were multiple uses of the same instruction. This interacts well with the existing loadpre that j-t does to open up many new jump threads earlier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73768 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/JumpThreading')
-rw-r--r--test/Transforms/JumpThreading/dup-cond.ll30
1 files changed, 30 insertions, 0 deletions
diff --git a/test/Transforms/JumpThreading/dup-cond.ll b/test/Transforms/JumpThreading/dup-cond.ll
new file mode 100644
index 0000000..e20d939
--- /dev/null
+++ b/test/Transforms/JumpThreading/dup-cond.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | opt -jump-threading -die | llvm-dis | grep icmp | count 1
+
+declare void @f1()
+declare void @f2()
+declare void @f3()
+
+define i32 @test(i32 %A) {
+ %tmp455 = icmp eq i32 %A, 42
+ br i1 %tmp455, label %BB1, label %BB2
+
+BB2:
+ call void @f1()
+ br label %BB1
+
+
+BB1:
+ %tmp459 = icmp eq i32 %A, 42
+ br i1 %tmp459, label %BB3, label %BB4
+
+BB3:
+ call void @f2()
+ ret i32 3
+
+BB4:
+ call void @f3()
+ ret i32 4
+}
+
+
+