Add a -ftrapv-handler= option which allows a handler to invoke instead of simply aborting when a signed operation overflows. This mirrors the (GCC-incompatible) behaviour from clang 1.0 and 1.1 when -ftrapv was specified, but allows the handler to be defined for each compilation unit.

llvm-svn: 114192

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/CodeGen/integer-overflow.c b/clang/test/CodeGen/integer-overflow.c
index 9bed741b323..103cc8427bb 100644
--- a/clang/test/CodeGen/integer-overflow.c
+++ b/clang/test/CodeGen/integer-overflow.c
@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s --check-prefix=DEFAULT
 // RUN: %clang_cc1 %s -emit-llvm -o - -fwrapv | FileCheck %s --check-prefix=WRAPV
 // RUN: %clang_cc1 %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=TRAPV
+// RUN: %clang_cc1 %s -emit-llvm -o - -ftrapv -ftrapv-handler foo | FileCheck %s --check-prefix=TRAPV_HANDLER
 
 
 // Tests for signed integer overflow stuff.
@@ -14,21 +15,25 @@ void test1() {
   // DEFAULT: add nsw i32
   // WRAPV: add i32
   // TRAPV: llvm.sadd.with.overflow.i32
+  // TRAPV_HANDLER: foo(
   f11G = a + b;
   
   // DEFAULT: sub nsw i32
   // WRAPV: sub i32
   // TRAPV: llvm.ssub.with.overflow.i32
+  // TRAPV_HANDLER: foo(
   f11G = a - b;
   
   // DEFAULT: mul nsw i32
   // WRAPV: mul i32
   // TRAPV: llvm.smul.with.overflow.i32
+  // TRAPV_HANDLER: foo(
   f11G = a * b;
 
   // DEFAULT: sub nsw i32 0, 
   // WRAPV: sub i32 0, 
   // TRAPV: llvm.ssub.with.overflow.i32(i32 0
+  // TRAPV_HANDLER: foo(
   f11G = -a;
   
   // PR7426 - Overflow checking for increments.
@@ -36,10 +41,12 @@ void test1() {
   // DEFAULT: add nsw i32 {{.*}}, 1
   // WRAPV: add i32 {{.*}}, 1
   // TRAPV: llvm.sadd.with.overflow.i32({{.*}}, i32 1)
+  // TRAPV_HANDLER: foo(
   ++a;
   
   // DEFAULT: add nsw i32 {{.*}}, -1
   // WRAPV: add i32 {{.*}}, -1
   // TRAPV: llvm.sadd.with.overflow.i32({{.*}}, i32 -1)
+  // TRAPV_HANDLER: foo(
   --a;
 }