Comment and minor code cleanup for GCStrategy (NFC)

Updating comments to reflect the current state of the world after my recent changes to ownership structure and generally better describe what a GCStrategy is and how it works.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224086 91177308-0d34-0410-b5e6-96231b3b80d8
Tom Stellard is now the code owner for libclc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224088 91177308-0d34-0410-b5e6-96231b3b80d8
Document that PassManager::add() may delete the pass right away.

Also remove redundant documentation:
- doxygen will copy documentation to overriden methods.
- Use \copydoc on PIMPL classes instead of replicating the text.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224089 91177308-0d34-0410-b5e6-96231b3b80d8
Bitcode: Add missing "Remove in 4.0" comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224090 91177308-0d34-0410-b5e6-96231b3b80d8
Update the modules build to match r223802.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224091 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Don't promote f32 select to i32

This is nice for the instruction patterns, but it complicates
min / max matching. The select doesn't have the correct type and would
require looking through the bitcasts for the real float operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224092 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: fmin/fmax_legacy are not associative

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224093 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Fix min/max matching problems with unordered compares

The returned operand needs to be permuted for the unordered
compares. Also fix incorrectly producing fmin_legacy / fmax_legacy
for f64, which don't exist.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224094 91177308-0d34-0410-b5e6-96231b3b80d8
Fix another infinite loop in InstCombine

Summary:
InstCombine infinite-loops for the testcase added
It is because InstCombine is generating instructions that can be
optimized by itself. Fix by not optimizing frem if the optimized
type is the same as original type.
rdar://problem/19150820

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D6634

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224097 91177308-0d34-0410-b5e6-96231b3b80d8
A fix for PR21176. 
 
DW_OP_const <const> doesn't describe a constant value, but a value at a constant address. 
The proper way to describe a constant value is DW_OP_constu <const>, DW_OP_stack_value. 
Added DW_OP_stack_value to the stack. 

Marked incorrect-variable-debugloc1.ll to xfail for PowerPC64, while the the failure (PR21881) 
is being investigated. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224098 91177308-0d34-0410-b5e6-96231b3b80d8
Use unique_ptr operator= instead of constructor to make it explicit that there's no conversion occurring.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224103 91177308-0d34-0410-b5e6-96231b3b80d8
Remove an unnecessary reference variable that pointed to a unique_ptr variable. Just use the unique_ptr variable directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224104 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unnecessary calls to unique_ptr::get.

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Use range-based for loop.

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Use make_unique instead of reset() and 'new'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224107 91177308-0d34-0410-b5e6-96231b3b80d8
Use unique_ptr to remove an explicit delete. Change return type to pass the unique_ptr to caller.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224108 91177308-0d34-0410-b5e6-96231b3b80d8
Pass output stream to AsLexInput instead of the whole tool_output_file.

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Merge branch 'master', remote-tracking branch 'trunk/master'