Check to see if the 'no-builtin' attribute is set before simplifying a library call.

llvm-svn: 175470

1 files changed, 23 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/no-builtin.ll b/llvm/test/Transforms/InstCombine/no-builtin.ll
new file mode 100644
index 00000000000..a576cd4813d
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/no-builtin.ll
@@ -0,0 +1,23 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+@.str = private unnamed_addr constant [14 x i8] c"hello world!\0A\00", align 1
+
+; CHECK: @foo
+; CHECK: printf
+define void @foo() nounwind ssp uwtable "no-builtin" {
+entry:
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0))
+  ret void
+}
+
+; CHECK: @bar
+; CHECK: puts
+define void @bar() nounwind ssp uwtable {
+entry:
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0))
+  ret void
+}
+
+declare i32 @printf(i8*, ...)
+
+attributes #0 = { nounwind ssp uwtable "no-builtin" }
+attributes #1 = { nounwind ssp uwtable }