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llvm-6502/test/Transforms/GlobalOpt/array-elem-refs.ll

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Fix a use-after-free error in GlobalOpt CleanupConstantGlobalUsers GlobalOpt's CleanupConstantGlobalUsers function uses a worklist array to manage constant users to be visited. The pointers in this array need to be weak handles because when we delete a constant array, we may also be holding a pointer to one of its elements (or an element of one of its elements if we're dealing with an array of arrays) in the worklist. Fixes PR17347. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197178 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-12 20:45:24 +00:00
; RUN: opt < %s -S -globalopt | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%struct.S = type { i8, i8 }
[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
@c = internal global i8** bitcast (i8* getelementptr (i8, i8* bitcast ([8 x i8*]* @b to i8*), i64 48) to i8**), align 8
@b = internal global [8 x i8*] [i8* null, i8* null, i8* null, i8* null, i8* null, i8* null, i8* getelementptr inbounds (%struct.S, %struct.S* @a, i32 0, i32 0), i8* getelementptr (i8, i8* getelementptr inbounds (%struct.S, %struct.S* @a, i32 0, i32 0), i64 1)], align 16
Fix a use-after-free error in GlobalOpt CleanupConstantGlobalUsers GlobalOpt's CleanupConstantGlobalUsers function uses a worklist array to manage constant users to be visited. The pointers in this array need to be weak handles because when we delete a constant array, we may also be holding a pointer to one of its elements (or an element of one of its elements if we're dealing with an array of arrays) in the worklist. Fixes PR17347. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197178 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-12 20:45:24 +00:00
@a = internal global %struct.S zeroinitializer, align 1
; Function Attrs: nounwind uwtable
define signext i8 @foo() #0 {
entry:
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 21:17:42 +00:00
%0 = load i8**, i8*** @c, align 8
%1 = load i8*, i8** %0, align 8
%2 = load i8, i8* %1, align 1
Fix a use-after-free error in GlobalOpt CleanupConstantGlobalUsers GlobalOpt's CleanupConstantGlobalUsers function uses a worklist array to manage constant users to be visited. The pointers in this array need to be weak handles because when we delete a constant array, we may also be holding a pointer to one of its elements (or an element of one of its elements if we're dealing with an array of arrays) in the worklist. Fixes PR17347. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197178 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-12 20:45:24 +00:00
ret i8 %2
; CHECK-LABEL: @foo
; CHECK: ret i8 0
}
; Function Attrs: nounwind uwtable
define i32 @main() #0 {
entry:
%retval = alloca i32, align 4
store i32 0, i32* %retval
ret i32 0
}
attributes #0 = { nounwind uwtable }
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