fix rdar://9289603 - clang should fold trivial ?: for enums as well as integer constants into select at -O0
by making the isCheapEnoughToEvaluateUnconditionally predicate handle anything that folds to a constant. In particular, we now fold enums.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129649 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/conditional.c b/test/CodeGen/conditional.c
index d079aaf..15e15f1 100644
--- a/test/CodeGen/conditional.c
+++ b/test/CodeGen/conditional.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm %s -o %t
+// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
float test1(int cond, float a, float b) {
return cond ? a : b;
@@ -47,3 +47,22 @@
p ? p : test9spare();
}
+// CHECK: @test10
+// CHECK: select i1 {{.*}}, i32 4, i32 5
+int test10(int c) {
+ return c ? 4 : 5;
+}
+enum { Gronk = 5 };
+
+// rdar://9289603
+// CHECK: @test11
+// CHECK: select i1 {{.*}}, i32 4, i32 5
+int test11(int c) {
+ return c ? 4 : Gronk;
+}
+
+// CHECK: @test12
+// CHECK: select i1 {{.*}}, double 4.0{{.*}}, double 2.0
+double test12(int c) {
+ return c ? 4.0 : 2.0;
+}