From fa0b409ef81f1f70edfa72857c4e211ff50998d5 Mon Sep 17 00:00:00 2001 From: Eli Friedman Date: Wed, 2 Mar 2011 01:49:12 +0000 Subject: PR9350: increment/decrement of char (and anything else narrower than int) can't overflow due to promotion rules; emit a wrapping add for those cases. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126816 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/integer-overflow.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'test/CodeGen/integer-overflow.c') diff --git a/test/CodeGen/integer-overflow.c b/test/CodeGen/integer-overflow.c index 066ef89574..1d460656a1 100644 --- a/test/CodeGen/integer-overflow.c +++ b/test/CodeGen/integer-overflow.c @@ -50,11 +50,17 @@ void test1() { // TRAPV_HANDLER: foo( --a; - // -fwrapv should turn off inbounds for GEP's, PR9256 extern int* P; ++P; // DEFAULT: getelementptr inbounds i32* // WRAPV: getelementptr i32* // TRAPV: getelementptr inbounds i32* + + // PR9350: char increment never overflows. + extern volatile signed char PR9350; + // DEFAULT: add i8 {{.*}}, 1 + // WRAPV: add i8 {{.*}}, 1 + // TRAPV: add i8 {{.*}}, 1 + ++PR9350; } -- cgit v1.2.3-18-g5258