OpenE2K/rust
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Remove passes that were causing bad optmizations

Browse Source
This commit is contained in:
James Miller 2013-05-29 13:12:36 +12:00
parent 4988c89e86
commit 998e2ce4ff
1 changed files with 19 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
src/librustc/back/passes.rs
View File

@ -55,12 +55,13 @@ impl PassManager {
pub fn populatePassManager(pm: &mut PassManager, level:session::OptLevel) {
unsafe {
// We add a lot of normally-unused prototypes, so always strip them
// straight away, later passes will get rid of any that are optimized
// away
pm.addPass(llvm::LLVMCreateStripDeadPrototypesPass());
if level == session::No {
pm.addPass(llvm::LLVMCreateAlwaysInlinerPass());
// We add a lot of unused prototypes, so strip them no matter
// what
pm.addPass(llvm::LLVMCreateStripDeadPrototypesPass());
return;
}
@ -81,6 +82,13 @@ pub fn populatePassManager(pm: &mut PassManager, level:session::OptLevel) {
pm.addPass(llvm::LLVMCreatePruneEHPass());
if level == session::Aggressive {
// Do this before inlining, since inlining might
// make minor changes to functions that mean they
// can't be merged, despite being almost identical
pm.addPass(llvm::LLVMCreateMergeFunctionsPass());
}
match level {
session::Less => pm.addPass(llvm::LLVMCreateFunctionInliningPass(200)),
session::Default => pm.addPass(llvm::LLVMCreateFunctionInliningPass(225)),
@ -94,8 +102,6 @@ pub fn populatePassManager(pm: &mut PassManager, level:session::OptLevel) {
pm.addPass(llvm::LLVMCreateArgumentPromotionPass());
}
pm.addPass(llvm::LLVMCreateSROAPass());
pm.addPass(llvm::LLVMCreateEarlyCSEPass());
pm.addPass(llvm::LLVMCreateSimplifyLibCallsPass());
pm.addPass(llvm::LLVMCreateJumpThreadingPass());
@ -109,8 +115,6 @@ pub fn populatePassManager(pm: &mut PassManager, level:session::OptLevel) {
pm.addPass(llvm::LLVMCreateLoopRotatePass());
pm.addPass(llvm::LLVMCreateLICMPass());
pm.addPass(llvm::LLVMCreateLoopUnswitchPass());
pm.addPass(llvm::LLVMCreateInstructionCombiningPass());
pm.addPass(llvm::LLVMCreateIndVarSimplifyPass());
pm.addPass(llvm::LLVMCreateLoopIdiomPass());
@ -134,16 +138,17 @@ pub fn populatePassManager(pm: &mut PassManager, level:session::OptLevel) {
pm.addPass(llvm::LLVMCreateBBVectorizePass());
pm.addPass(llvm::LLVMCreateInstructionCombiningPass());
pm.addPass(llvm::LLVMCreateEarlyCSEPass());
pm.addPass(llvm::LLVMCreateLoopUnrollPass());
pm.addPass(llvm::LLVMCreateAggressiveDCEPass());
pm.addPass(llvm::LLVMCreateCFGSimplificationPass());
pm.addPass(llvm::LLVMCreateInstructionSimplifierPass());
if level != session::Less {
pm.addPass(llvm::LLVMCreateGlobalDCEPass());
pm.addPass(llvm::LLVMCreateConstantMergePass());
}
if level == session::Aggressive {
pm.addPass(llvm::LLVMCreateMergeFunctionsPass());
}
pm.addPass(llvm::LLVMCreateStripDeadPrototypesPass());
}
}