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[VENTUS][fix] Add phi-node instruction to divergence for non-kernel function 

Add phi-node instruction to divergence for non-kernel function.
This commit is contained in:
qinfan 2023-12-26 16:38:50 +08:00
parent e4582536e7
commit 715fd8dead
2 changed files with 30 additions and 0 deletions
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5
llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
View File

@ -401,5 +401,10 @@ bool RISCVTTIImpl::isSourceOfDivergence(const Value *V) const {
if (isa<InvokeInst>(V)) if (isa<InvokeInst>(V))
return true; return true;
if (dyn_cast<PHINode>(V) &&
dyn_cast<Instruction>(V)->getParent()->getParent()->getCallingConv() !=
CallingConv::VENTUS_KERNEL)
return true;
return false; return false;
} }

25
llvm/test/CodeGen/RISCV/VentusGPGPU/non_kernel_branch.ll Normal file
View File

@ -0,0 +1,25 @@
; RUN: llc -mtriple=riscv32 -mcpu=ventus-gpgpu -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=VENTUS %s
; Function Attrs: nofree norecurse nosync nounwind memory(none) vscale_range(1,2048)
define dso_local i32 @loop(i32 noundef %x) local_unnamed_addr {
; VENTUS: vbeq v1, v0, .LBB0_4
; VENTUS: vadd.vi v0, v0, 2
; VENTUS: vbne v0, v2, .LBB0_1
entry:
br label %for.body
for.body: ; preds = %entry, %for.inc
%i.05 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
%cmp1 = icmp eq i32 %i.05, %x
br i1 %cmp1, label %cleanup, label %for.inc
for.inc: ; preds = %for.body
%add = add nuw nsw i32 %i.05, 2
%cmp.not = icmp eq i32 %add, 64
br i1 %cmp.not, label %cleanup, label %for.body
cleanup: ; preds = %for.body, %for.inc
%spec.select = phi i32 [ %i.05, %for.body ], [ 0, %for.inc ]
ret i32 %spec.select
}