1 files changed, 74 insertions, 0 deletions
diff --git a/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll b/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll
new file mode 100644
index 0000000..1e41319
--- /dev/null
+++ b/test/Transforms/CodeGenPrepare/overflow-intrinsics.ll
@@ -0,0 +1,74 @@
+; RUN: opt -codegenprepare -S < %s | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin10.0.0"
+
+; CHECK-LABEL: @test1(
+; CHECK: llvm.uadd.with.overflow
+; CHECK: ret i64
+define i64 @test1(i64 %a, i64 %b) nounwind ssp {
+entry:
+  %add = add i64 %b, %a
+  %cmp = icmp ult i64 %add, %a
+  %Q = select i1 %cmp, i64 %b, i64 42
+  ret i64 %Q
+}
+
+; CHECK-LABEL: @test2(
+; CHECK: llvm.uadd.with.overflow
+; CHECK: ret i64
+define i64 @test2(i64 %a, i64 %b) nounwind ssp {
+entry:
+  %add = add i64 %b, %a
+  %cmp = icmp ult i64 %add, %b
+  %Q = select i1 %cmp, i64 %b, i64 42
+  ret i64 %Q
+}
+
+; CHECK-LABEL: @test3(
+; CHECK: llvm.uadd.with.overflow
+; CHECK: ret i64
+define i64 @test3(i64 %a, i64 %b) nounwind ssp {
+entry:
+  %add = add i64 %b, %a
+  %cmp = icmp ugt i64 %b, %add
+  %Q = select i1 %cmp, i64 %b, i64 42
+  ret i64 %Q
+}
+
+; CHECK-LABEL: @test4(
+; CHECK: llvm.uadd.with.overflow
+; CHECK: extractvalue
+; CHECK: extractvalue
+; CHECK: select
+define i64 @test4(i64 %a, i64 %b, i1 %c) nounwind ssp {
+entry:
+  %add = add i64 %b, %a
+  %cmp = icmp ugt i64 %b, %add
+  br i1 %c, label %next, label %exit
+
+ next:
+  %Q = select i1 %cmp, i64 %b, i64 42
+  ret i64 %Q
+
+ exit:
+  ret i64 0
+}
+
+; CHECK-LABEL: @test5(
+; CHECK-NOT: llvm.uadd.with.overflow
+; CHECK: next
+define i64 @test5(i64 %a, i64 %b, i64* %ptr, i1 %c) nounwind ssp {
+entry:
+  %add = add i64 %b, %a
+  store i64 %add, i64* %ptr
+  %cmp = icmp ugt i64 %b, %add
+  br i1 %c, label %next, label %exit
+
+ next:
+  %Q = select i1 %cmp, i64 %b, i64 42
+  ret i64 %Q
+
+ exit:
+  ret i64 0
+}