llvm-6502/test/Transforms/InstCombine/strcpy_chk-1.ll
David Blaikie 5a70dd1d82 [opaque pointer type] Add textual IR support for explicit type parameter to gep operator
Similar to gep (r230786) and load (r230794) changes.

Similar migration script can be used to update test cases, which
successfully migrated all of LLVM and Polly, but about 4 test cases
needed manually changes in Clang.

(this script will read the contents of stdin and massage it into stdout
- wrap it in the 'apply.sh' script shown in previous commits + xargs to
apply it over a large set of test cases)

import fileinput
import sys
import re

rep = re.compile(r"(getelementptr(?:\s+inbounds)?\s*\()((<\d*\s+x\s+)?([^@]*?)(|\s*addrspace\(\d+\))\s*\*(?(3)>)\s*)(?=$|%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|zeroinitializer|<|\[\[[a-zA-Z]|\{\{)", re.MULTILINE | re.DOTALL)

def conv(match):
  line = match.group(1)
  line += match.group(4)
  line += ", "
  line += match.group(2)
  return line

line = sys.stdin.read()
off = 0
for match in re.finditer(rep, line):
  sys.stdout.write(line[off:match.start()])
  sys.stdout.write(conv(match))
  off = match.end()
sys.stdout.write(line[off:])

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232184 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-13 18:20:45 +00:00

104 lines
4.8 KiB
LLVM

; Test lib call simplification of __strcpy_chk calls with various values
; for src, dst, and slen.
;
; 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"
@a = common global [60 x i8] zeroinitializer, align 1
@b = common global [60 x i8] zeroinitializer, align 1
@.str = private constant [12 x i8] c"abcdefghijk\00"
; Check cases where slen >= strlen (src).
define i8* @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 1, i1 false)
; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
ret i8* %ret
}
define i8* @test_simplify2() {
; CHECK-LABEL: @test_simplify2(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 1, i1 false)
; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 12)
ret i8* %ret
}
define i8* @test_simplify3() {
; CHECK-LABEL: @test_simplify3(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 1, i1 false)
; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
ret i8* %ret
}
; Check cases where there are no string constants.
define i8* @test_simplify4() {
; CHECK-LABEL: @test_simplify4(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
; CHECK-NEXT: %strcpy = call i8* @strcpy(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0))
; CHECK-NEXT: ret i8* %strcpy
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
ret i8* %ret
}
; Check case where the string length is not constant.
define i8* @test_simplify5() {
; CHECK-LABEL: @test_simplify5(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
; CHECK-NEXT: %len = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false)
; CHECK-NEXT: %1 = call i8* @__memcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 %len)
; CHECK-NEXT: ret i8* %1
%len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false)
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 %len)
ret i8* %ret
}
; Check case where the source and destination are the same.
define i8* @test_simplify6() {
; CHECK-LABEL: @test_simplify6(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
; CHECK-NEXT: %len = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false)
; CHECK-NEXT: %ret = call i8* @__strcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i32 %len)
; CHECK-NEXT: ret i8* %ret
%len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false)
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %dst, i32 %len)
ret i8* %ret
}
; Check case where slen < strlen (src).
define i8* @test_no_simplify1() {
; CHECK-LABEL: @test_no_simplify1(
%dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
%src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
; CHECK-NEXT: %ret = call i8* @__strcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0), i32 8)
; CHECK-NEXT: ret i8* %ret
%ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 8)
ret i8* %ret
}
declare i8* @__strcpy_chk(i8*, i8*, i32) nounwind
declare i32 @llvm.objectsize.i32.p0i8(i8*, i1) nounwind readonly