llvm-6502/test/Transforms/InstCombine/strncat-3.ll
Meador Inge 73d8a5864f instcombine: Migrate strcat and strncat optimizations
This patch migrates the strcat and strncat optimizations from the
simplify-libcalls pass into the instcombine library call simplifier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165874 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-13 16:45:32 +00:00

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694 B
LLVM

; Test that the strncat libcall simplifier works correctly.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
@hello = constant [6 x i8] c"hello\00"
@empty = constant [1 x i8] c"\00"
@a = common global [32 x i8] zeroinitializer, align 1
declare i16* @strncat(i8*, i8*, i32)
define void @test_nosimplify1() {
; CHECK: @test_nosimplify1
; CHECK: call i16* @strncat
; CHECK: ret void
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
call i16* @strncat(i8* %dst, i8* %src, i32 13)
ret void
}