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authorNick Lewycky <nicholas@mxc.ca>2011-01-16 21:57:20 +0000
committerNick Lewycky <nicholas@mxc.ca>2011-01-16 21:57:20 +0000
commit33d84007b55b526c355e0c9e25abc450f2732bc7 (patch)
treeca6b26abf5e3a22f831a87cf7b3c5f4c88898566 /test/Transforms/CorrelatedValuePropagation
parentddbb3bcdd7727a891eea5d52ad78dbb8c0be131c (diff)
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Test for lazy value info's ability to prove the absense of NULLs in pointers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123601 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/CorrelatedValuePropagation')
-rw-r--r--test/Transforms/CorrelatedValuePropagation/non-null.ll103
1 files changed, 103 insertions, 0 deletions
diff --git a/test/Transforms/CorrelatedValuePropagation/non-null.ll b/test/Transforms/CorrelatedValuePropagation/non-null.ll
new file mode 100644
index 0000000..b14abd8
--- /dev/null
+++ b/test/Transforms/CorrelatedValuePropagation/non-null.ll
@@ -0,0 +1,103 @@
+; RUN: opt < %s -correlated-propagation -S | FileCheck %s
+
+define void @test1(i8* %ptr) {
+; CHECK: test1
+ %A = load i8* %ptr
+ br label %bb
+bb:
+ icmp ne i8* %ptr, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+define void @test2(i8* %ptr) {
+; CHECK: test2
+ store i8 0, i8* %ptr
+ br label %bb
+bb:
+ icmp ne i8* %ptr, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+define void @test3() {
+; CHECK: test3
+ %ptr = alloca i8
+ br label %bb
+bb:
+ icmp ne i8* %ptr, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
+define void @test4(i8* %dest, i8* %src) {
+; CHECK: test4
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 false)
+ br label %bb
+bb:
+ icmp ne i8* %dest, null
+ icmp ne i8* %src, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+declare void @llvm.memmove.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
+define void @test5(i8* %dest, i8* %src) {
+; CHECK: test5
+ call void @llvm.memmove.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 false)
+ br label %bb
+bb:
+ icmp ne i8* %dest, null
+ icmp ne i8* %src, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1)
+define void @test6(i8* %dest) {
+; CHECK: test6
+ call void @llvm.memset.p0i8.i32(i8* %dest, i8 255, i32 1, i32 1, i1 false)
+ br label %bb
+bb:
+ icmp ne i8* %dest, null
+; CHECK-NOT: icmp
+ ret void
+}
+
+define void @test7(i8* %dest, i8* %src, i32 %len) {
+; CHECK: test7
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 %len, i32 1, i1 false)
+ br label %bb
+bb:
+ %KEEP1 = icmp ne i8* %dest, null
+; CHECK: KEEP1
+ %KEEP2 = icmp ne i8* %src, null
+; CHECK: KEEP2
+ ret void
+}
+
+declare void @llvm.memcpy.p1i8.p1i8.i32(i8 addrspace(1) *, i8 addrspace(1) *, i32, i32, i1)
+define void @test8(i8 addrspace(1) * %dest, i8 addrspace(1) * %src) {
+; CHECK: test8
+ call void @llvm.memcpy.p1i8.p1i8.i32(i8 addrspace(1) * %dest, i8 addrspace(1) * %src, i32 1, i32 1, i1 false)
+ br label %bb
+bb:
+ %KEEP1 = icmp ne i8 addrspace(1) * %dest, null
+; CHECK: KEEP1
+ %KEEP2 = icmp ne i8 addrspace(1) * %src, null
+; CHECK: KEEP2
+ ret void
+}
+
+define void @test9(i8* %dest, i8* %src) {
+; CHECK: test9
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 true)
+ br label %bb
+bb:
+ %KEEP1 = icmp ne i8* %dest, null
+; CHECK: KEEP1
+ %KEEP2 = icmp ne i8* %src, null
+; CHECK: KEEP2
+ ret void
+}