[multiversion] Implement the old pass manager's TTI wrapper pass in

terms of the new pass manager's TargetIRAnalysis.

Yep, this is one of the nicer bits of the new pass manager's design.
Passes can in many cases operate in a vacuum and so we can just nest
things when convenient. This is particularly convenient here as I can
now consolidate all of the TargetMachine logic on this analysis.

The most important change here is that this pushes the function we need
TTI for all the way into the TargetMachine, and re-creates the TTI
object for each function rather than re-using it for each function.
We're now prepared to teach the targets to produce function-specific TTI
objects with specific subtargets cached, etc.

One piece of feedback I'd love here is whether its worth renaming any of
this stuff. None of the names really seem that awesome to me at this
point, but TargetTransformInfoWrapperPass is particularly ... odd.
TargetIRAnalysisWrapper might make more sense. I would want to do that
rename separately anyways, but let me know what you think.

llvm-svn: 227731

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/Target/TargetMachineC.cpp b/llvm/lib/Target/TargetMachineC.cpp
index 9d759a3e644..8be10cb3262 100644
--- a/llvm/lib/Target/TargetMachineC.cpp
+++ b/llvm/lib/Target/TargetMachineC.cpp
@@ -256,5 +256,6 @@ char *LLVMGetDefaultTargetTriple(void) {
 }
 
 void LLVMAddAnalysisPasses(LLVMTargetMachineRef T, LLVMPassManagerRef PM) {
-  unwrap(PM)->add(createTargetTransformInfoWrapperPass(unwrap(T)->getTTI()));
+  unwrap(PM)->add(
+      createTargetTransformInfoWrapperPass(unwrap(T)->getTargetIRAnalysis()));
 }