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

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Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 llvm-svn: 171512
2013-01-05 03:19:47 +08:00
; RUN: opt < %s -basicaa -gvn -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"
; rdar://12801584
; Value of %shouldExit can be changed by RunInMode.
; Make sure we do not replace load %shouldExit in while.cond.backedge
; with a phi node where the value from while.body is 0.
define i32 @test() nounwind ssp {
entry:
; CHECK: test()
; CHECK: while.body:
; CHECK: call void @RunInMode
; CHECK: br i1 %tobool, label %while.cond.backedge, label %if.then
; CHECK: while.cond.backedge:
[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 i32, i32* %shouldExit
Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 llvm-svn: 171512
2013-01-05 03:19:47 +08:00
; CHECK: br i1 %cmp, label %while.body
%shouldExit = alloca i32, align 4
%tasksIdle = alloca i32, align 4
store i32 0, i32* %shouldExit, align 4
store i32 0, i32* %tasksIdle, align 4
call void @CTestInitialize(i32* %tasksIdle) nounwind
[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
%0 = load i32, i32* %shouldExit, align 4
Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 llvm-svn: 171512
2013-01-05 03:19:47 +08:00
%cmp1 = icmp eq i32 %0, 0
br i1 %cmp1, label %while.body.lr.ph, label %while.end
while.body.lr.ph:
br label %while.body
while.body:
call void @RunInMode(i32 100) nounwind
[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
%1 = load i32, i32* %tasksIdle, align 4
Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 llvm-svn: 171512
2013-01-05 03:19:47 +08:00
%tobool = icmp eq i32 %1, 0
br i1 %tobool, label %while.cond.backedge, label %if.then
if.then:
store i32 0, i32* %tasksIdle, align 4
call void @TimerCreate(i32* %shouldExit) nounwind
br label %while.cond.backedge
while.cond.backedge:
[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
%2 = load i32, i32* %shouldExit, align 4
Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 llvm-svn: 171512
2013-01-05 03:19:47 +08:00
%cmp = icmp eq i32 %2, 0
br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
while.cond.while.end_crit_edge:
br label %while.end
while.end:
ret i32 0
}
declare void @CTestInitialize(i32*)
declare void @RunInMode(i32)
declare void @TimerCreate(i32*)