diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/known-bits-vector.ll | 10 |
2 files changed, 4 insertions, 9 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 6d25ead3fe3..e272315d826 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2265,7 +2265,8 @@ void SelectionDAG::computeKnownBits(SDValue Op, APInt &KnownZero, break; case ISD::SRA: if (const APInt *ShAmt = getValidShiftAmountConstant(Op)) { - computeKnownBits(Op.getOperand(0), KnownZero, KnownOne, Depth + 1); + computeKnownBits(Op.getOperand(0), KnownZero, KnownOne, DemandedElts, + Depth + 1); KnownZero = KnownZero.lshr(*ShAmt); KnownOne = KnownOne.lshr(*ShAmt); // If we know the value of the sign bit, then we know it is copied across diff --git a/llvm/test/CodeGen/X86/known-bits-vector.ll b/llvm/test/CodeGen/X86/known-bits-vector.ll index 63ac9942dfa..0ba3cb106dc 100644 --- a/llvm/test/CodeGen/X86/known-bits-vector.ll +++ b/llvm/test/CodeGen/X86/known-bits-vector.ll @@ -156,18 +156,12 @@ define <4 x i32> @knownbits_mask_shl_shuffle_lshr(<4 x i32> %a0) nounwind { define <4 x i32> @knownbits_mask_ashr_shuffle_lshr(<4 x i32> %a0) nounwind { ; X32-LABEL: knownbits_mask_ashr_shuffle_lshr: ; X32: # BB#0: -; X32-NEXT: vpand {{\.LCPI.*}}, %xmm0, %xmm0 -; X32-NEXT: vpsrad $15, %xmm0, %xmm0 -; X32-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,3,3] -; X32-NEXT: vpsrld $30, %xmm0, %xmm0 +; X32-NEXT: vxorps %xmm0, %xmm0, %xmm0 ; X32-NEXT: retl ; ; X64-LABEL: knownbits_mask_ashr_shuffle_lshr: ; X64: # BB#0: -; X64-NEXT: vpand {{.*}}(%rip), %xmm0, %xmm0 -; X64-NEXT: vpsrad $15, %xmm0, %xmm0 -; X64-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,3,3] -; X64-NEXT: vpsrld $30, %xmm0, %xmm0 +; X64-NEXT: vxorps %xmm0, %xmm0, %xmm0 ; X64-NEXT: retq %1 = and <4 x i32> %a0, <i32 131071, i32 -1, i32 -1, i32 131071> %2 = ashr <4 x i32> %1, <i32 15, i32 15, i32 15, i32 15> |
