RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2025-02-27 00:15:58 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Split the argument unscheduling loop in the WebAssembly register

Browse Source 
coloring pass. Turn the logic into "look for an insert point and
then move things past the insert point".

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253626 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2015-11-20 00:34:54 +00:00
parent cbf870d3b1
commit 77072b3170
1 changed files with 18 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
lib/Target/WebAssembly/WebAssemblyRegColoring.cpp
View File

@ -98,20 +98,30 @@ bool WebAssemblyRegColoring::runOnMachineFunction(MachineFunction &MF) {
// FIXME: If scheduling has moved an ARGUMENT virtual register, move it back,
// and recompute liveness. This is a temporary hack.
bool SawNonArg = false;
bool MovedArg = false;
MachineBasicBlock &EntryMBB = MF.front();
for (auto MII = EntryMBB.begin(); MII != EntryMBB.end(); ) {
MachineInstr *MI = &*MII++;
MachineBasicBlock::iterator InsertPt = EntryMBB.end();
// Look for the first NonArg instruction.
for (auto MII = EntryMBB.begin(), MIE = EntryMBB.end(); MII != MIE; ++MII) {
MachineInstr *MI = MII;
if (MI->getOpcode() != WebAssembly::ARGUMENT_I32 &&
MI->getOpcode() != WebAssembly::ARGUMENT_I64 &&
MI->getOpcode() != WebAssembly::ARGUMENT_F32 &&
MI->getOpcode() != WebAssembly::ARGUMENT_F64) {
InsertPt = MII;
break;
}
}
// Now move any argument instructions later in the block
// to before our first NonArg instruction.
for (auto I = InsertPt, E = EntryMBB.end(); I != E; ++I) {
MachineInstr *MI = I;
if (MI->getOpcode() == WebAssembly::ARGUMENT_I32 ||
MI->getOpcode() == WebAssembly::ARGUMENT_I64 ||
MI->getOpcode() == WebAssembly::ARGUMENT_F32 ||
MI->getOpcode() == WebAssembly::ARGUMENT_F64) {
EntryMBB.insert(EntryMBB.begin(), MI->removeFromParent());
if (SawNonArg)
MovedArg = true;
} else {
SawNonArg = true;
EntryMBB.insert(InsertPt, MI->removeFromParent());
MovedArg = true;
}
}
if (MovedArg) {