50b9ca4dda
After https://github.com/llvm/llvm-project/pull/153643, there may be a BranchOnCond with constant condition in the entry block. Simplify those in removeBranchOnConst. This removes a number of redundant conditional branch from entry blocks. In some cases, it may also make the original scalar loop unreachable, because we know it will never execute. In that case, we need to remove the loop from LoopInfo, because all unreachable blocks may dominate each other, making LoopInfo invalid. In those cases, we can also completely remove the loop, for which I'll share a follow-up patch. Depends on https://github.com/llvm/llvm-project/pull/153643. PR: https://github.com/llvm/llvm-project/pull/154510
56 lines
2.3 KiB
LLVM
56 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -vector-library=MASSV -force-vector-interleave=1 \
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; RUN: -vectorizer-maximize-bandwidth -passes='default<O2>,inject-tli-mappings,loop-vectorize' \
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; RUN: -mtriple=powerpc64le-unknown-linux -S -mcpu=pwr9 2>&1 | FileCheck %s
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define dso_local double @test(ptr %Arr) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <2 x double> [ zeroinitializer, [[ENTRY]] ], [ [[TMP3:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw float, ptr [[ARR:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, ptr [[TMP0]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = fpext <2 x float> [[WIDE_LOAD]] to <2 x double>
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; CHECK-NEXT: [[TMP2:%.*]] = tail call fast <2 x double> @__sind2(<2 x double> [[TMP1]])
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; CHECK-NEXT: [[TMP3]] = fadd fast <2 x double> [[TMP2]], [[VEC_PHI]]
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 128
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; CHECK-NEXT: br i1 [[TMP4]], label [[FOR_END:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi <2 x double> [ [[TMP3]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP5:%.*]] = tail call fast double @llvm.vector.reduce.fadd.v2f64(double 0.000000e+00, <2 x double> [[DOTLCSSA]])
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; CHECK-NEXT: ret double [[TMP5]]
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;
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entry:
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br label %for.cond
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for.cond:
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%Sum.0 = phi double [ 0.000000e+00, %entry ], [ %add, %for.inc ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%cmp = icmp slt i32 %i.0, 128
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup:
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br label %for.end
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for.body:
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%idxprom = sext i32 %i.0 to i64
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%arrayidx = getelementptr inbounds float, ptr %Arr, i64 %idxprom
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%0 = load float, ptr %arrayidx, align 4
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%conv = fpext float %0 to double
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%1 = call fast double @llvm.sin.f64(double %conv)
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%add = fadd fast double %Sum.0, %1
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end:
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ret double %Sum.0
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}
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declare double @llvm.sin.f64(double)
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