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llvm-mirror/test/Transforms/GlobalOpt/cxx-dtor.ll

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Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. llvm-svn: 127970
2011-03-20 18:59:11 +01:00
; RUN: opt < %s -globalopt -S | FileCheck %s
%0 = type { i32, void ()* }
%struct.A = type { i8 }
GlobalOpt: Be more aggressive about elminating side-effect free static dtors. GlobalOpt runs early in the pipeline (before inlining) and complex class hierarchies often introduce bitcasts or GEPs which weren't optimized away. Teach it to ignore side-effect free instructions instead of depending on other passes to remove them. llvm-svn: 150174
2012-02-09 15:26:06 +01:00
%struct.B = type { }
Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. llvm-svn: 127970
2011-03-20 18:59:11 +01:00
@a = global %struct.A zeroinitializer, align 1
@__dso_handle = external global i8*
@llvm.global_ctors = appending global [1 x %0] [%0 { i32 65535, void ()* @_GLOBAL__I_a }]
; CHECK-NOT: call i32 @__cxa_atexit
define internal void @__cxx_global_var_init() nounwind section "__TEXT,__StaticInit,regular,pure_instructions" {
[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
2015-03-13 19:20:45 +01:00
%1 = call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.A*)* @_ZN1AD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.A, %struct.A* @a, i32 0, i32 0), i8* bitcast (i8** @__dso_handle to i8*))
Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. llvm-svn: 127970
2011-03-20 18:59:11 +01:00
ret void
}
define linkonce_odr void @_ZN1AD1Ev(%struct.A* %this) nounwind align 2 {
GlobalOpt: Be more aggressive about elminating side-effect free static dtors. GlobalOpt runs early in the pipeline (before inlining) and complex class hierarchies often introduce bitcasts or GEPs which weren't optimized away. Teach it to ignore side-effect free instructions instead of depending on other passes to remove them. llvm-svn: 150174
2012-02-09 15:26:06 +01:00
%t = bitcast %struct.A* %this to %struct.B*
call void @_ZN1BD1Ev(%struct.B* %t)
Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. llvm-svn: 127970
2011-03-20 18:59:11 +01:00
ret void
}
declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)
GlobalOpt: Be more aggressive about elminating side-effect free static dtors. GlobalOpt runs early in the pipeline (before inlining) and complex class hierarchies often introduce bitcasts or GEPs which weren't optimized away. Teach it to ignore side-effect free instructions instead of depending on other passes to remove them. llvm-svn: 150174
2012-02-09 15:26:06 +01:00
define linkonce_odr void @_ZN1BD1Ev(%struct.B* %this) nounwind align 2 {
Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. llvm-svn: 127970
2011-03-20 18:59:11 +01:00
ret void
}
define internal void @_GLOBAL__I_a() nounwind section "__TEXT,__StaticInit,regular,pure_instructions" {
call void @__cxx_global_var_init()
ret void
}
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