From 8143a84c46b8d2fb58eddb46d84dd5d44d03cb6c Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Thu, 6 Jan 2011 14:22:52 +0000 Subject: InstCombine: Turn _chk functions into the "unsafe" variant if length and max langth are equal. This happens when we take the (non-constant) length from a malloc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122961 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/objsize.ll | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'test') diff --git a/test/Transforms/InstCombine/objsize.ll b/test/Transforms/InstCombine/objsize.ll index 9950e5f..4154ea0 100644 --- a/test/Transforms/InstCombine/objsize.ll +++ b/test/Transforms/InstCombine/objsize.ll @@ -176,3 +176,14 @@ define i32 @test9(i32 %x) { ; CHECK-NOT: ret i32 %x ret i32 %objsize } + +define i8* @test10(i32 %x) { +; CHECK: @test10 + %alloc = call noalias i8* @malloc(i32 %x) nounwind + %objsize = call i32 @llvm.objectsize.i32(i8* %alloc, i1 false) nounwind readonly + tail call i8* @__memset_chk(i8* %alloc, i32 0, i32 %x, i32 %objsize) nounwind +; CHECK-NOT: @llvm.objectsize +; CHECK: @llvm.memset + ret i8* %alloc +; CHECK: ret i8* +} -- cgit v1.1