Author: baldrick
Date: Wed Jan 16 16:55:25 2008
New Revision: 46098
URL: http://llvm.org/viewvc/llvm-project?rev=46098&view=rev
Log:
Trampoline support for x86-64. This looks like
it should work, but I have no machine to test
it on. Committed because it will at least
cause no harm, and maybe someone can test it
for me!
Added:
llvm/trunk/test/CodeGen/X86/2008-01-16-Trampoline.ll
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=46098&r1=46097&r2=46098&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Wed Jan 16 16:55:25 2008
@@ -4802,8 +4802,59 @@
SrcValueSDNode *TrmpSV = cast<SrcValueSDNode>(Op.getOperand(4));
+ const X86InstrInfo *TII =
+ ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
+
if (Subtarget->is64Bit()) {
- return SDOperand(); // not yet supported
+ SDOperand OutChains[6];
+
+ // Large code-model.
+
+ const unsigned char JMP64r = TII->getBaseOpcodeFor(X86::JMP64r);
+ const unsigned char MOV64ri = TII->getBaseOpcodeFor(X86::MOV64ri);
+
+ const unsigned char N86R10 =
+ ((X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R10);
+ const unsigned char N86R11 =
+ ((X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R11);
+
+ const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
+
+ // Load the pointer to the nested function into R11.
+ unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
+ SDOperand Addr = Trmp;
+ OutChains[0] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpSV->getValue(), TrmpSV->getOffset());
+
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(2, MVT::i64));
+ OutChains[1] = DAG.getStore(Root, FPtr, Addr, TrmpSV->getValue(),
+ TrmpSV->getOffset() + 2, false, 2);
+
+ // Load the 'nest' parameter value into R10.
+ // R10 is specified in X86CallingConv.td
+ OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(10,
MVT::i64));
+ OutChains[2] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpSV->getValue(), TrmpSV->getOffset() + 10);
+
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(12,
MVT::i64));
+ OutChains[3] = DAG.getStore(Root, Nest, Addr, TrmpSV->getValue(),
+ TrmpSV->getOffset() + 12, false, 2);
+
+ // Jump to the nested function.
+ OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(20,
MVT::i64));
+ OutChains[4] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpSV->getValue(), TrmpSV->getOffset() + 20);
+
+ unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(22,
MVT::i64));
+ OutChains[5] = DAG.getStore(Root, DAG.getConstant(ModRM, MVT::i8), Addr,
+ TrmpSV->getValue(), TrmpSV->getOffset() + 22);
+
+ SDOperand Ops[] =
+ { Trmp, DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 6) };
+ return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(), Ops, 2);
} else {
Function *Func = (Function *)
cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
@@ -4847,17 +4898,15 @@
break;
}
- const X86InstrInfo *TII =
- ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
-
SDOperand OutChains[4];
SDOperand Addr, Disp;
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(10,
MVT::i32));
Disp = DAG.getNode(ISD::SUB, MVT::i32, FPtr, Addr);
- unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
- unsigned char N86Reg = ((X86RegisterInfo*)RegInfo)->getX86RegNum(NestReg);
+ const unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
+ const unsigned char N86Reg =
+ ((X86RegisterInfo*)RegInfo)->getX86RegNum(NestReg);
OutChains[0] = DAG.getStore(Root, DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
Trmp, TrmpSV->getValue(), TrmpSV->getOffset());
@@ -4865,7 +4914,7 @@
OutChains[1] = DAG.getStore(Root, Nest, Addr, TrmpSV->getValue(),
TrmpSV->getOffset() + 1, false, 1);
- unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
+ const unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(5, MVT::i32));
OutChains[2] = DAG.getStore(Root, DAG.getConstant(JMP, MVT::i8), Addr,
TrmpSV->getValue() + 5, TrmpSV->getOffset());
Added: llvm/trunk/test/CodeGen/X86/2008-01-16-Trampoline.ll
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/2008-01-16-Trampoline.ll?rev=46098&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/2008-01-16-Trampoline.ll (added)
+++ llvm/trunk/test/CodeGen/X86/2008-01-16-Trampoline.ll Wed Jan 16 16:55:25
2008
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -march=x86
+; RUN: llvm-as < %s | llc -march=x86-64
+
+
%struct.FRAME.gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets
= type { i32, i32, void (i32, i32)*, i8 (i32, i32)* }
+
+define fastcc i32
@gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets.5146(i64
%table.0.0, i64 %table.0.1, i32 %last, i32 %pos) {
+entry:
+ %tramp22 = call i8* @llvm.init.trampoline( i8* null, i8* bitcast (void
(%struct.FRAME.gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets*,
i32, i32)*
@gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets__move.5177
to i8*), i8* null ) ; <i8*> [#uses=0]
+ unreachable
+}
+
+declare void
@gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets__move.5177(%struct.FRAME.gnat__perfect_hash_generators__select_char_position__build_identical_keys_sets*
nest , i32, i32) nounwind
+
+declare i8* @llvm.init.trampoline(i8*, i8*, i8*) nounwind
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