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llvm-project/llvm/test/Transforms/GVN/atomic.ll

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Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
; RUN: opt -basicaa -gvn -S < %s | 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"
target triple = "x86_64-apple-macosx10.7.0"
@x = common global i32 0, align 4
@y = common global i32 0, align 4
; GVN across unordered store (allowed)
define i32 @test1() nounwind uwtable ssp {
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; CHECK-LABEL: test1
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
; CHECK: add i32 %x, %x
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load i32, i32* @y
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
store atomic i32 %x, i32* @x unordered, align 4
[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 i32, i32* @y
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
%z = add i32 %x, %y
ret i32 %z
}
; GVN across unordered load (allowed)
define i32 @test3() nounwind uwtable ssp {
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; CHECK-LABEL: test3
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
; CHECK: add i32 %x, %x
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load i32, i32* @y
%y = load atomic i32, i32* @x unordered, align 4
%z = load i32, i32* @y
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
%a = add i32 %x, %z
%b = add i32 %y, %a
ret i32 %b
}
; GVN load to unordered load (allowed)
define i32 @test5() nounwind uwtable ssp {
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; CHECK-LABEL: test5
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
; CHECK: add i32 %x, %x
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load atomic i32, i32* @x unordered, align 4
%y = load i32, i32* @x
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
%z = add i32 %x, %y
ret i32 %z
}
; GVN unordered load to load (unordered load must not be removed)
define i32 @test6() nounwind uwtable ssp {
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; CHECK-LABEL: test6
[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: load atomic i32, i32* @x unordered
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load i32, i32* @x
%x2 = load atomic i32, i32* @x unordered, align 4
Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). llvm-svn: 137888
2011-08-18 06:22:24 +08:00
%x3 = add i32 %x, %x2
ret i32 %x3
}
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; GVN across release-acquire pair (forbidden)
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
define i32 @test7() nounwind uwtable ssp {
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
; CHECK-LABEL: test7
; CHECK: add i32 %x, %y
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load i32, i32* @y
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
store atomic i32 %x, i32* @x release, align 4
[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
%w = load atomic i32, i32* @x acquire, align 4
%y = load i32, i32* @y
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
%z = add i32 %x, %y
ret i32 %z
}
; GVN across monotonic store (allowed)
define i32 @test9() nounwind uwtable ssp {
; CHECK-LABEL: test9
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
; CHECK: add i32 %x, %x
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load i32, i32* @y
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
store atomic i32 %x, i32* @x monotonic, align 4
[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 i32, i32* @y
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
%z = add i32 %x, %y
ret i32 %z
}
; GVN of an unordered across monotonic load (not allowed)
Relax the constraint more in MemoryDependencyAnalysis.cpp Even loads/stores that have a stronger ordering than monotonic can be safe. The rule is no release-acquire pair on the path from the QueryInst, assuming that the QueryInst is not atomic itself. llvm-svn: 216771
2014-08-30 04:32:58 +08:00
define i32 @test10() nounwind uwtable ssp {
; CHECK-LABEL: test10
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
; CHECK: add i32 %x, %y
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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%x = load atomic i32, i32* @y unordered, align 4
%clobber = load atomic i32, i32* @x monotonic, align 4
%y = load atomic i32, i32* @y monotonic, align 4
Answer to Philip Reames comments - add check for volatile (probably unneeded, but I agree that we should be conservative about it). - strengthen condition from isUnordered() to isSimple(), as I don't understand well enough Unordered semantics (and it also matches the comment better this way) to be confident in the previous behaviour (thanks for catching that one, I had missed the case Monotonic/Unordered). - separate a condition in two. - lengthen comment about aliasing and loads - add tests in GVN/atomic.ll llvm-svn: 215943
2014-08-19 06:18:14 +08:00
%z = add i32 %x, %y
ret i32 %z
}
MemoryDependenceAnalysis: Don't miscompile atomics r216771 introduced a change to MemoryDependenceAnalysis that allowed it to reason about acquire/release operations. However, this change does not ensure that the acquire/release operations pair. Unfortunately, this leads to miscompiles as we won't see an acquire load as properly memory effecting. This largely reverts r216771. This fixes PR22708. llvm-svn: 232889
2015-03-21 14:19:17 +08:00
define i32 @PR22708(i1 %flag) {
; CHECK-LABEL: PR22708
entry:
br i1 %flag, label %if.then, label %if.end
if.then:
store i32 43, i32* @y, align 4
; CHECK: store i32 43, i32* @y, align 4
br label %if.end
if.end:
load atomic i32, i32* @x acquire, align 4
%load = load i32, i32* @y, align 4
; CHECK: load atomic i32, i32* @x acquire, align 4
; CHECK: load i32, i32* @y, align 4
ret i32 %load
}