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| author | Chad Rosier <mcrosier@apple.com> | 2011-06-16 01:21:54 +0000 |
|---|---|---|
| committer | Chad Rosier <mcrosier@apple.com> | 2011-06-16 01:21:54 +0000 |
| commit | 689edc8b2845f7a6cf9403722de2000598f68489 (patch) | |
| tree | 396e45022d75ee68d919f41a76a1ed5a6c8c804e /test | |
| parent | c06b5bf34004a9b01048905c8750761146094586 (diff) | |
| download | llvm-689edc8b2845f7a6cf9403722de2000598f68489.tar.gz llvm-689edc8b2845f7a6cf9403722de2000598f68489.tar.bz2 llvm-689edc8b2845f7a6cf9403722de2000598f68489.tar.xz | |
Revision r128665 added an optimization to make use of NEON multiplier
accumulator forwarding. Specifically (from SVN log entry):
Distribute (A + B) * C to (A * C) + (B * C) to make use of NEON multiplier
accumulator forwarding:
vadd d3, d0, d1
vmul d3, d3, d2
=>
vmul d3, d0, d2
vmla d3, d1, d2
Make sure it catches cases where operand 1 is add/fadd/sub/fsub, which was
intended in the original revision.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133127 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/vmul.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/vmul.ll b/test/CodeGen/ARM/vmul.ll index 1fd6581ae0..d62b5d415f 100644 --- a/test/CodeGen/ARM/vmul.ll +++ b/test/CodeGen/ARM/vmul.ll @@ -492,3 +492,25 @@ entry: store <8 x i8> %10, <8 x i8>* %11, align 8 ret void } + +define void @distribute2_commutative(%struct.uint8x8_t* nocapture %dst, i8* %src, i32 %mul) nounwind { +entry: +; CHECK: distribute2_commutative +; CHECK-NOT: vadd.i8 +; CHECK: vmul.i8 +; CHECK: vmla.i8 + %0 = trunc i32 %mul to i8 + %1 = insertelement <8 x i8> undef, i8 %0, i32 0 + %2 = shufflevector <8 x i8> %1, <8 x i8> undef, <8 x i32> zeroinitializer + %3 = tail call <16 x i8> @llvm.arm.neon.vld1.v16i8(i8* %src, i32 1) + %4 = bitcast <16 x i8> %3 to <2 x double> + %5 = extractelement <2 x double> %4, i32 1 + %6 = bitcast double %5 to <8 x i8> + %7 = extractelement <2 x double> %4, i32 0 + %8 = bitcast double %7 to <8 x i8> + %9 = add <8 x i8> %6, %8 + %10 = mul <8 x i8> %2, %9 + %11 = getelementptr inbounds %struct.uint8x8_t* %dst, i32 0, i32 0 + store <8 x i8> %10, <8 x i8>* %11, align 8 + ret void +} |