When the new expr's array size is an ICE, emit it as a constant expression.

This bypasses integer sanitization checks which are redundant on the expression since it's been checked by Sema. Fixes a clang codegen assertion on "void test() { new int[0+1]{0}; }" when building with -fsanitize=signed-integer-overflow.

llvm-svn: 295006

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/new-array-init.cpp b/clang/test/CodeGenCXX/new-array-init.cpp
index 0429ae770bc..ccc218e2b2d 100644
--- a/clang/test/CodeGenCXX/new-array-init.cpp
+++ b/clang/test/CodeGenCXX/new-array-init.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -std=c++11 -triple i386-unknown-unknown %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -std=c++11 -triple i386-unknown-unknown %s -emit-llvm -fsanitize=signed-integer-overflow -o - | FileCheck --check-prefix=SIO %s
 
 // CHECK: @[[ABC4:.*]] = {{.*}} constant [4 x i8] c"abc\00"
 // CHECK: @[[ABC15:.*]] = {{.*}} constant [15 x i8] c"abc\00\00\00\00
@@ -116,3 +117,9 @@ void aggr_sufficient(int n) {
   struct Aggr { int a, b; };
   new Aggr[n] { 1, 2, 3 };
 }
+
+// SIO-LABEL: define void @_Z14constexpr_testv
+void constexpr_test() {
+  // SIO: call i8* @_Zna{{.}}(i32 4)
+  new int[0+1]{0};
+}