There is no need to check if we want to hoist the immediate value of an
shift instruction. Simply return TCC_Free right away.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206101 91177308-0d34-0410-b5e6-96231b3b80d8
Originally the cost model would give up for large constants and just return the
maximum cost. This is not what we want for constant hoisting, because some of
these constants are large in bitwidth, but are still cheap to materialize.
This commit fixes the cost model to either return TCC_Free if the cost cannot be
determined, or accurately calculate the cost even for large constants
(bitwidth > 128).
This fixes <rdar://problem/16591573>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206100 91177308-0d34-0410-b5e6-96231b3b80d8
GCC 4.8 complains with:
warning: enumeral and non-enumeral type in conditional expression
Although this is silly and harmless in this case, add an explicit cast to
silence the warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205949 91177308-0d34-0410-b5e6-96231b3b80d8
The immediate cost calculation code was hitting an assertion in the included
test case, because APInt was still internally 128-bits. Truncating it to 64-bits
fixed the issue.
Fixes <rdar://problem/16572521>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205947 91177308-0d34-0410-b5e6-96231b3b80d8
This implements the target-hooks for ARM64 to enable constant hoisting.
This fixes <rdar://problem/14774662> and <rdar://problem/16381500>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205791 91177308-0d34-0410-b5e6-96231b3b80d8
This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.
Everything will be easier with the target in-tree though, hence this
commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
