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| author | Robert Lytton <robert@xmos.com> | 2013-10-11 10:26:29 +0000 |
|---|---|---|
| committer | Robert Lytton <robert@xmos.com> | 2013-10-11 10:26:29 +0000 |
| commit | 7b5376659c1c822960a5cb56d5e1417cfd74673f (patch) | |
| tree | b818d22174632fc11ac7afba213c0bc622a6e0cd | |
| parent | c879eabcc25c4099a50939ed0bca86471201b183 (diff) | |
| download | llvm-7b5376659c1c822960a5cb56d5e1417cfd74673f.tar.gz llvm-7b5376659c1c822960a5cb56d5e1417cfd74673f.tar.bz2 llvm-7b5376659c1c822960a5cb56d5e1417cfd74673f.tar.xz | |
XCore target: add XCoreTargetLowering::isZExtFree()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192431 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/XCore/XCoreISelLowering.cpp | 18 | ||||
| -rw-r--r-- | lib/Target/XCore/XCoreISelLowering.h | 4 | ||||
| -rw-r--r-- | test/CodeGen/XCore/zextfree.ll | 15 |
3 files changed, 37 insertions, 0 deletions
diff --git a/lib/Target/XCore/XCoreISelLowering.cpp b/lib/Target/XCore/XCoreISelLowering.cpp index e209c29522..489f0a7244 100644 --- a/lib/Target/XCore/XCoreISelLowering.cpp +++ b/lib/Target/XCore/XCoreISelLowering.cpp @@ -166,6 +166,24 @@ XCoreTargetLowering::XCoreTargetLowering(XCoreTargetMachine &XTM) setMinFunctionAlignment(1); } +bool XCoreTargetLowering::isZExtFree(SDValue Val, EVT VT2) const { + if (Val.getOpcode() != ISD::LOAD) + return false; + + EVT VT1 = Val.getValueType(); + if (!VT1.isSimple() || !VT1.isInteger() || + !VT2.isSimple() || !VT2.isInteger()) + return false; + + switch (VT1.getSimpleVT().SimpleTy) { + default: break; + case MVT::i8: + return true; + } + + return false; +} + SDValue XCoreTargetLowering:: LowerOperation(SDValue Op, SelectionDAG &DAG) const { switch (Op.getOpcode()) diff --git a/lib/Target/XCore/XCoreISelLowering.h b/lib/Target/XCore/XCoreISelLowering.h index 7761b7cef6..2a6c8748cd 100644 --- a/lib/Target/XCore/XCoreISelLowering.h +++ b/lib/Target/XCore/XCoreISelLowering.h @@ -83,6 +83,10 @@ namespace llvm { explicit XCoreTargetLowering(XCoreTargetMachine &TM); + using TargetLowering::isZExtFree; + virtual bool isZExtFree(SDValue Val, EVT VT2) const; + + virtual unsigned getJumpTableEncoding() const; virtual MVT getScalarShiftAmountTy(EVT LHSTy) const { return MVT::i32; } diff --git a/test/CodeGen/XCore/zextfree.ll b/test/CodeGen/XCore/zextfree.ll new file mode 100644 index 0000000000..48dce88653 --- /dev/null +++ b/test/CodeGen/XCore/zextfree.ll @@ -0,0 +1,15 @@ +; RUN: llc -march=xcore < %s | FileCheck %s + +; CHECK-LABEL: test: +; CHECK-NOT: zext +define void @test(i8* %s1) { +entry: + %u8 = load i8* %s1, align 1 + %bool = icmp eq i8 %u8, 0 + br label %BB1 +BB1: + br i1 %bool, label %BB1, label %BB2 +BB2: + br i1 %bool, label %BB1, label %BB2 +} + |