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DataLayout is mandatory, update the API to reflect it with references.

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Summary:
Now that the DataLayout is a mandatory part of the module, let's start
cleaning the codebase. This patch is a first attempt at doing that.

This patch is not exactly NFC as for instance some places were passing
a nullptr instead of the DataLayout, possibly just because there was a
default value on the DataLayout argument to many functions in the API.
Even though it is not purely NFC, there is no change in the
validation.

I turned as many pointer to DataLayout to references, this helped
figuring out all the places where a nullptr could come up.

I had initially a local version of this patch broken into over 30
independant, commits but some later commit were cleaning the API and
touching part of the code modified in the previous commits, so it
seemed cleaner without the intermediate state.

Test Plan:

Reviewers: echristo

Subscribers: llvm-commits

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231740 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mehdi Amini
2015-03-10 02:37:25 +00:00
parent 935a3aa5bc
commit 529919ff31
138 changed files with 2479 additions and 2877 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/CodeGenPrepare.cpp
+3 -8
View File
@@ -1244,7 +1244,6 @@ bool CodeGenPrepare::OptimizeCallInst(CallInst *CI, bool& ModifiedDT) {
WeakVH IterHandle(CurInstIterator);
replaceAndRecursivelySimplify(CI, RetVal,
TLI ? TLI->getDataLayout() : nullptr,
TLInfo, ModifiedDT ? nullptr : DT);
// If the iterator instruction was recursively deleted, start over at the
@@ -1287,15 +1286,11 @@ bool CodeGenPrepare::OptimizeCallInst(CallInst *CI, bool& ModifiedDT) {
// From here on out we're working with named functions.
if (!CI->getCalledFunction()) return false;
// We'll need DataLayout from here on out.
const DataLayout *TD = TLI ? TLI->getDataLayout() : nullptr;
if (!TD) return false;
// Lower all default uses of _chk calls. This is very similar
// to what InstCombineCalls does, but here we are only lowering calls
// to fortified library functions (e.g. __memcpy_chk) that have the default
// "don't know" as the objectsize. Anything else should be left alone.
FortifiedLibCallSimplifier Simplifier(TD, TLInfo, true);
FortifiedLibCallSimplifier Simplifier(TLInfo, true);
if (Value *V = Simplifier.optimizeCall(CI)) {
CI->replaceAllUsesWith(V);
CI->eraseFromParent();
@@ -4196,8 +4191,8 @@ bool CodeGenPrepare::OptimizeInst(Instruction *I, bool& ModifiedDT) {
// It is possible for very late stage optimizations (such as SimplifyCFG)
// to introduce PHI nodes too late to be cleaned up. If we detect such a
// trivial PHI, go ahead and zap it here.
if (Value *V = SimplifyInstruction(P, TLI ? TLI->getDataLayout() : nullptr,
TLInfo, DT)) {
const DataLayout &DL = I->getModule()->getDataLayout();
if (Value *V = SimplifyInstruction(P, DL, TLInfo, DT)) {
P->replaceAllUsesWith(V);
P->eraseFromParent();
++NumPHIsElim;