From 9441ad0b6e02ee9558168b37a9620ef1afe79388 Mon Sep 17 00:00:00 2001 From: Michael Liao Date: Wed, 15 Aug 2012 03:49:59 +0000 Subject: fix infinite loop in instcombine with more than 4GB memcpy - memcpy size is wrongly truncated into 32-bit and treat 8GB memcpy is 0-sized memcpy - as 0-sized memcpy/memset is already removed before SimplifyMemTransfer and SimplifyMemSet in visitCallInst, replace 0 checking with assertions. - replace getZExtValue() with getLimitedValue() according to Eli Friedman git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161923 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/memcpy.ll | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'test') diff --git a/test/Transforms/InstCombine/memcpy.ll b/test/Transforms/InstCombine/memcpy.ll index 8a2e3aa..3a68ff9 100644 --- a/test/Transforms/InstCombine/memcpy.ll +++ b/test/Transforms/InstCombine/memcpy.ll @@ -1,6 +1,7 @@ ; RUN: opt < %s -instcombine -S | FileCheck %s declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind define void @test1(i8* %a) { tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false) @@ -17,3 +18,10 @@ define void @test2(i8* %a) { ; CHECK: define void @test2 ; CHECK-NEXT: call void @llvm.memcpy } + +define void @test3(i8* %d, i8* %s) { + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false) + ret void +; CHECK: define void @test3 +; CHECK-NEXT: call void @llvm.memcpy +} -- cgit v1.1