From 462098824f9563f5afd0fb85d1f7368af1fa116d Mon Sep 17 00:00:00 2001 From: Nick Lewycky Date: Thu, 20 Oct 2011 00:34:35 +0000 Subject: "@string = constant i8 0" is a value i8* string of length zero. Analyze that correctly in GetStringLength, fixing PR11181! llvm-svn: 142558 --- llvm/test/Transforms/SimplifyLibCalls/StrLen.ll | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'llvm/test') diff --git a/llvm/test/Transforms/SimplifyLibCalls/StrLen.ll b/llvm/test/Transforms/SimplifyLibCalls/StrLen.ll index 45b349d6840..acd8aaf6e54 100644 --- a/llvm/test/Transforms/SimplifyLibCalls/StrLen.ll +++ b/llvm/test/Transforms/SimplifyLibCalls/StrLen.ll @@ -6,6 +6,7 @@ target datalayout = "e-p:32:32" @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=3] @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=3] @null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1] +@nullstring = constant i8 0 declare i32 @strlen(i8*) @@ -54,3 +55,8 @@ define i1 @test7() { %ne_null = icmp ne i32 %null_l, 0 ; [#uses=1] ret i1 %ne_null } + +define i32 @test8() { + %len = tail call i32 @strlen(i8* @nullstring) nounwind + ret i32 %len +} -- cgit v1.2.3