diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 709e9e8aae..e0f87c03b7 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -15821,8 +15821,9 @@ static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) { // Quit if the constant is neither 0 or 1. return SDValue(); - // Skip 'zext' node. - if (SetCC.getOpcode() == ISD::ZERO_EXTEND) + // Skip 'zext' or 'trunc' node. + if (SetCC.getOpcode() == ISD::ZERO_EXTEND || + SetCC.getOpcode() == ISD::TRUNCATE) SetCC = SetCC.getOperand(0); switch (SetCC.getOpcode()) { @@ -15841,9 +15842,13 @@ static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) { return SDValue(); // Quit if false value is not a constant. if (!FVal) { - // A special case for rdrand, where 0 is set if false cond is found. SDValue Op = SetCC.getOperand(0); - if (Op.getOpcode() != X86ISD::RDRAND) + // Skip 'zext' or 'trunc' node. + if (Op.getOpcode() == ISD::ZERO_EXTEND || + Op.getOpcode() == ISD::TRUNCATE) + Op = Op.getOperand(0); + // A special case for rdrand, where 0 is set if false cond is found. + if (Op.getOpcode() != X86ISD::RDRAND || Op.getResNo() != 0) return SDValue(); } // Quit if false value is not the constant 0 or 1. |