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llvm-project/llvm/test/Analysis/BasicAA/memset_pattern.ll

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Teach BasicAA about the aliasing properties of memset_pattern16. Fixes PR10872 and <rdar://problem/10065079>. llvm-svn: 139204
2011-09-07 07:33:25 +08:00
; RUN: opt -S -basicaa -gvn < %s | FileCheck %s
; PR10872
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"
target triple = "x86_64-apple-macosx10.7"
@z = internal global i32 0, align 4
@y = internal global i32 0, align 4
@x = internal constant i32 0, align 4
; CHECK: @test
define i32 @test() nounwind uwtable ssp {
entry:
store i32 1, i32* @z
tail call void @memset_pattern16(i8* bitcast (i32* @y to i8*), i8* bitcast (i32* @x to i8*), i64 4) nounwind
; CHECK-NOT: load
[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
%l = load i32, i32* @z
Teach BasicAA about the aliasing properties of memset_pattern16. Fixes PR10872 and <rdar://problem/10065079>. llvm-svn: 139204
2011-09-07 07:33:25 +08:00
; CHECK: ret i32 1
ret i32 %l
}
[BasicAA] Remove special casing of memset_pattern16 in favor of generic attribute inference Most of the properties of memset_pattern16 can be now covered by the generic attributes and inferred by InferFunctionAttrs. The only exceptions are: - We don't yet have a writeonly attribute for the first argument. - We don't have an attribute for modeling the access size facts encoded in MemoryLocation.cpp. Differential Revision: http://reviews.llvm.org/D15879 llvm-svn: 256911
2016-01-06 12:53:16 +08:00
declare void @memset_pattern16(i8*, i8* readonly, i64) argmemonly