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| author | Joel Jones <joel_k_jones@apple.com> | 2012-07-13 23:26:27 +0000 |
|---|---|---|
| committer | Joel Jones <joel_k_jones@apple.com> | 2012-07-13 23:26:27 +0000 |
| commit | 87d747b1fbf89aa0ba08cfc0e26655aa7739c77d (patch) | |
| tree | 85e29488a1e4f24e86b7879515b2ffc86edc10a9 | |
| parent | d64e2ee48a6dca4612dda56b785be571be391047 (diff) | |
This is one of the first steps at moving to replace target-dependent
intrinsics with target-indepdent intrinsics. The first instruction(s) to be
handled are the vector versions of count leading zeros (ctlz).
The changes here are to clang so that it generates a target independent
vector ctlz when it sees an ARM dependent vector ctlz. The changes in llvm
are to match the target independent vector ctlz and in VMCore/AutoUpgrade.cpp
to update any existing bc files containing ARM dependent vector ctlzs with
target-independent ctlzs. There are also changes to an existing test case in
llvm for ARM vector count instructions and a new test for the bitcode upgrade.
<rdar://problem/11831778>
There is deliberately no test for the change to clang, as so far as I know, no
consensus has been reached regarding how to test neon instructions in clang;
q.v. <rdar://problem/8762292>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160201 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index 575fa5d1ac..d8fdad6453 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -1629,7 +1629,10 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID, } case ARM::BI__builtin_neon_vclz_v: case ARM::BI__builtin_neon_vclzq_v: { - Function *F = CGM.getIntrinsic(Intrinsic::arm_neon_vclz, Ty); + // generate target-independent intrinsic; also need to add second argument + // for whether or not clz of zero is undefined; on ARM it isn't. + Function *F = CGM.getIntrinsic(Intrinsic::ctlz, Ty); + Ops.push_back(Builder.getInt1(Target.isCLZForZeroUndef())); return EmitNeonCall(F, Ops, "vclz"); } case ARM::BI__builtin_neon_vcnt_v: |