RPCS3/llvm
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm.git synced 2024-12-18 01:17:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Temporarily disable on-demand fast-isel.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107393 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-07-01 12:15:30 +00:00
parent cf32c6e004
commit 63b95a6f82
3 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
lib/CodeGen/LLVMTargetMachine.cpp
View File

@ -329,15 +329,19 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
if (OptLevel != CodeGenOpt::None)
PM.add(createOptimizePHIsPass());
if (OptLevel != CodeGenOpt::None) {
// With optimization, dead code should already be eliminated. However
// there is one known exception: lowered code for arguments that are only
// used by tail calls, where the tail calls reuse the incoming stack
// arguments directly (see t11 in test/CodeGen/X86/sibcall.ll).
PM.add(createDeadMachineInstructionElimPass());
printAndVerify(PM, "After codegen DCE pass",
/* allowDoubleDefs= */ true);
// Delete dead machine instructions regardless of optimization level.
//
// At -O0, fast-isel frequently creates dead instructions.
//
// With optimization, dead code should already be eliminated. However
// there is one known exception: lowered code for arguments that are only
// used by tail calls, where the tail calls reuse the incoming stack
// arguments directly (see t11 in test/CodeGen/X86/sibcall.ll).
PM.add(createDeadMachineInstructionElimPass());
printAndVerify(PM, "After codegen DCE pass",
/* allowDoubleDefs= */ true);
if (OptLevel != CodeGenOpt::None) {
PM.add(createOptimizeExtsPass());
if (!DisableMachineLICM)
PM.add(createMachineLICMPass());

2
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -709,11 +709,13 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) {
FastIS->startNewBlock(BB);
// Do FastISel on as many instructions as possible.
for (; BI != End; ++BI) {
#if 0
// Defer instructions with no side effects; they'll be emitted
// on-demand later.
if (BI->isSafeToSpeculativelyExecute() &&
!FuncInfo->isExportedInst(BI))
continue;
#endif
// Try to select the instruction with FastISel.
if (FastIS->SelectInstruction(BI))

2
test/CodeGen/X86/fast-isel-loads.ll
View File

@ -5,7 +5,7 @@
; CHECK: foo:
; CHECK-NEXT: movq %rdi, -8(%rsp)
; CHECK-NEXT: movq %rsi, -16(%rsp)
; CHECK-NEXT: movsd 128(%rsi,%rdi,8), %xmm0
; CHECK: movsd 128(%rsi,%rdi,8), %xmm0
; CHECK-NEXT: ret
define double @foo(i64 %x, double* %p) nounwind {