diff options
Diffstat (limited to 'contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff')
| -rw-r--r-- | contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff b/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff new file mode 100644 index 000000000000..bc09f273bb1b --- /dev/null +++ b/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff @@ -0,0 +1,22 @@ +Pull in r222562 from upstream llvm trunk (by Roman Divacky): + + Disable header duplication at -Oz in loop-rotate pass. + +This helps to minimize the size of boot2. + +Introduced here: http://svnweb.freebsd.org/changeset/base/274968 + +Index: lib/Transforms/IPO/PassManagerBuilder.cpp +=================================================================== +--- lib/Transforms/IPO/PassManagerBuilder.cpp ++++ lib/Transforms/IPO/PassManagerBuilder.cpp +@@ -195,7 +195,8 @@ void PassManagerBuilder::populateModulePassManager + MPM.add(createTailCallEliminationPass()); // Eliminate tail calls + MPM.add(createCFGSimplificationPass()); // Merge & remove BBs + MPM.add(createReassociatePass()); // Reassociate expressions +- MPM.add(createLoopRotatePass()); // Rotate Loop ++ // Rotate Loop - disable header duplication at -Oz ++ MPM.add(createLoopRotatePass(SizeLevel == 2 ? 0 : -1)); + MPM.add(createLICMPass()); // Hoist loop invariants + MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3)); + MPM.add(createInstructionCombiningPass()); |