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Also add unnamed_addr to functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-12-22 20:43:30 +00:00
parent 4a8b38c05b
commit 86e3cfb9dc
2 changed files with 30 additions and 13 deletions
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37
lib/Transforms/IPO/GlobalOpt.cpp
View File

@ -83,7 +83,7 @@ namespace {
bool OptimizeGlobalVars(Module &M);
bool OptimizeGlobalAliases(Module &M);
bool deleteIfDead(GlobalValue &GV);
bool processGlobal(GlobalVariable *GV);
bool processGlobal(GlobalValue &GV);
bool processInternalGlobal(GlobalVariable *GV, const GlobalStatus &GS);
bool OptimizeEmptyGlobalCXXDtors(Function *CXAAtExitFn);
@ -1705,28 +1705,31 @@ bool GlobalOpt::deleteIfDead(GlobalValue &GV) {
/// Analyze the specified global variable and optimize it if possible. If we
/// make a change, return true.
bool GlobalOpt::processGlobal(GlobalVariable *GV) {
if (deleteIfDead(*GV))
return true;
bool GlobalOpt::processGlobal(GlobalValue &GV) {
// Do more involved optimizations if the global is internal.
if (!GV->hasLocalLinkage())
if (!GV.hasLocalLinkage())
return false;
GlobalStatus GS;
if (GlobalStatus::analyzeGlobal(GV, GS))
if (GlobalStatus::analyzeGlobal(&GV, GS))
return false;
if (!GS.IsCompared && !GV->hasUnnamedAddr()) {
GV->setUnnamedAddr(true);
bool Changed = false;
if (!GS.IsCompared && !GV.hasUnnamedAddr()) {
GV.setUnnamedAddr(true);
NumUnnamed++;
Changed = true;
}
if (GV->isConstant() || !GV->hasInitializer())
return false;
auto *GVar = dyn_cast<GlobalVariable>(&GV);
if (!GVar)
return Changed;
return processInternalGlobal(GV, GS);
if (GVar->isConstant() || !GVar->hasInitializer())
return Changed;
return processInternalGlobal(GVar, GS) || Changed;
}
bool GlobalOpt::isPointerValueDeadOnEntryToFunction(const Function *F, GlobalValue *GV) {
@ -2044,6 +2047,9 @@ bool GlobalOpt::OptimizeFunctions(Module &M) {
Changed = true;
continue;
}
Changed |= processGlobal(*F);
if (!F->hasLocalLinkage())
continue;
if (isProfitableToMakeFastCC(F) && !F->isVarArg() &&
@ -2087,7 +2093,12 @@ bool GlobalOpt::OptimizeGlobalVars(Module &M) {
GV->setInitializer(New);
}
Changed |= processGlobal(GV);
if (deleteIfDead(*GV)) {
Changed = true;
continue;
}
Changed |= processGlobal(*GV);
}
return Changed;
}

6
test/Transforms/GlobalOpt/unnamed-addr.ll
View File

@ -12,7 +12,13 @@
; CHECK: @d = internal unnamed_addr constant [4 x i8] c"foo\00", align 1
; CHECK: @e = linkonce_odr global i32 0
; CHECK: define internal fastcc void @used_internal() unnamed_addr {
define internal void @used_internal() {
ret void
}
define i32 @get_e() {
call void @used_internal()
%t = load i32, i32* @e
ret i32 %t
}