[clang][NewPM] Fix broken -O0 test from missing assumptions

[leonardchan]

Summary

Add an AssumptionCache callback to the InlineFuntionInfo used for the AlwaysInlinerPass to match codegen of the AlwaysInlinerLegacyPass to generate llvm.assume. This fixes CodeGen/builtin-movdir.c when new PM is enabled by default.

[chandlerc]

LGTM. Bit annoying that we need to do this at O0, but fine...

clang/test/CodeGen/lto-newpm-pipeline.c

 
 // CHECK-FULL-O0: Starting llvm::Module pass manager run.
 // CHECK-FULL-O0: Running pass: AlwaysInlinerPass
+// CHECK-FULL-O0-NEXT: Running analysis: InnerAnalysisManagerProxy
 // CHECK-FULL-O0-NEXT: Running pass: CanonicalizeAliasesPass
 // CHECK-FULL-O0-NEXT: Running pass: NameAnonGlobalPass
 // CHECK-FULL-O0-NEXT: Running pass: BitcodeWriterPass

 
 // CHECK-THIN-O0: Starting llvm::Module pass manager run.
 // CHECK-THIN-O0: Running pass: AlwaysInlinerPass
+// CHECK-THIN-O0-NEXT: Running analysis: InnerAnalysisManagerProxy
 // CHECK-THIN-O0-NEXT: Running pass: CanonicalizeAliasesPass
 // CHECK-THIN-O0-NEXT: Running pass: NameAnonGlobalPass
 // CHECK-THIN-O0-NEXT: Running pass: ThinLTOBitcodeWriterPass

llvm/lib/Transforms/IPO/AlwaysInliner.cpp

 
 #define DEBUG_TYPE "inline"
 
-PreservedAnalyses AlwaysInlinerPass::run(Module &M, ModuleAnalysisManager &) {
-  InlineFunctionInfo IFI;
+PreservedAnalyses AlwaysInlinerPass::run(Module &M,
+                                         ModuleAnalysisManager &MAM) {
+  // Add inline assumptions during code generation.
+  FunctionAnalysisManager &FAM =
+      MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+  std::function<AssumptionCache &(Function &)> GetAssumptionCache =
+      [&](Function &F) -> AssumptionCache & {
+    return FAM.getResult<AssumptionAnalysis>(F);
+  };
+  InlineFunctionInfo IFI(/*cg=*/nullptr, &GetAssumptionCache);
+
   SmallSetVector<CallSite, 16> Calls;
   bool Changed = false;
   SmallVector<Function *, 16> InlinedFunctions;