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[NVPTX] Switch from StrongPHIElimination to PHIElimination in NVPTXTargetMachine, and add some missing optimization passes to addOptimizedRegAlloc 

Fixes PR17529

llvm-svn: 192445
This commit is contained in:
Justin Holewinski 2013-10-11 12:39:39 +00:00
parent 660597d190
commit a51418c1ca
2 changed files with 60 additions and 2 deletions
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24
llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
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@ -154,10 +154,30 @@ FunctionPass *NVPTXPassConfig::createTargetRegisterAllocator(bool) {
void NVPTXPassConfig::addFastRegAlloc(FunctionPass *RegAllocPass) {
assert(!RegAllocPass && "NVPTX uses no regalloc!");
addPass(&StrongPHIEliminationID);
addPass(&PHIEliminationID);
addPass(&TwoAddressInstructionPassID);
}
void NVPTXPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) {
assert(!RegAllocPass && "NVPTX uses no regalloc!");
addPass(&StrongPHIEliminationID);
addPass(&ProcessImplicitDefsID);
addPass(&LiveVariablesID);
addPass(&MachineLoopInfoID);
addPass(&PHIEliminationID);
addPass(&TwoAddressInstructionPassID);
addPass(&RegisterCoalescerID);
// PreRA instruction scheduling.
if (addPass(&MachineSchedulerID))
printAndVerify("After Machine Scheduling");
addPass(&StackSlotColoringID);
// FIXME: Needs physical registers
//addPass(&PostRAMachineLICMID);
printAndVerify("After StackSlotColoring");
}

38
llvm/test/CodeGen/NVPTX/pr17529.ll Normal file
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@ -0,0 +1,38 @@
; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
target triple = "nvptx64-nvidia-cuda"
; Function Attrs: nounwind
; CHECK: .func kernelgen_memcpy
define ptx_device void @kernelgen_memcpy(i8* nocapture %dst) #0 {
entry:
br i1 undef, label %for.end, label %vector.body
vector.body: ; preds = %vector.body, %entry
%index = phi i64 [ %index.next, %vector.body ], [ 0, %entry ]
%scevgep9 = getelementptr i8* %dst, i64 %index
%scevgep910 = bitcast i8* %scevgep9 to <4 x i8>*
store <4 x i8> undef, <4 x i8>* %scevgep910, align 1
%index.next = add i64 %index, 4
%0 = icmp eq i64 undef, %index.next
br i1 %0, label %middle.block, label %vector.body
middle.block: ; preds = %vector.body
br i1 undef, label %for.end, label %for.body.preheader1
for.body.preheader1: ; preds = %middle.block
%scevgep2 = getelementptr i8* %dst, i64 0
br label %for.body
for.body: ; preds = %for.body, %for.body.preheader1
%lsr.iv3 = phi i8* [ %scevgep2, %for.body.preheader1 ], [ %scevgep4, %for.body ]
store i8 undef, i8* %lsr.iv3, align 1
%scevgep4 = getelementptr i8* %lsr.iv3, i64 1
br label %for.body
for.end: ; preds = %middle.block, %entry
ret void
}
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }