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llvm-project/llvm/test/Transforms/GVN/2009-11-12-MemDepMallocBitC...

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Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call. It should continue scanning until the malloc call, and this patch fixes that. llvm-svn: 83931
2009-10-13 09:42:53 +08:00
; Test to make sure malloc's bitcast does not block detection of a store
; to aliased memory; GVN should not optimize away the load in this program.
; RUN: opt < %s -gvn -S | FileCheck %s
define i64 @test() {
[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:]) llvm-svn: 232184
2015-03-14 02:20:45 +08:00
%1 = tail call i8* @malloc(i64 mul (i64 4, i64 ptrtoint (i64* getelementptr (i64, i64* null, i64 1) to i64))) ; <i8*> [#uses=2]
Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call. It should continue scanning until the malloc call, and this patch fixes that. llvm-svn: 83931
2009-10-13 09:42:53 +08:00
store i8 42, i8* %1
%X = bitcast i8* %1 to i64* ; <i64*> [#uses=1]
[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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%Y = load i64, i64* %X ; <i64> [#uses=1]
Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call. It should continue scanning until the malloc call, and this patch fixes that. llvm-svn: 83931
2009-10-13 09:42:53 +08:00
ret i64 %Y
[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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
; CHECK: %Y = load i64, i64* %X
Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call. It should continue scanning until the malloc call, and this patch fixes that. llvm-svn: 83931
2009-10-13 09:42:53 +08:00
; CHECK: ret i64 %Y
}
declare noalias i8* @malloc(i64)