derek.holloway
7502bf64a4
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73 lines
3.2 KiB
LLVM
73 lines
3.2 KiB
LLVM
; RUN: opt -mcpu=cortex-m7 -mtriple=thumbv8.1m.main -passes=loop-unroll -S %s -o - | FileCheck %s --check-prefix=NLOB
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; RUN: opt -mcpu=cortex-m55 -mtriple=thumbv8.1m.main -passes=loop-unroll -S %s -o - | FileCheck %s --check-prefix=LOB
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; This test checks behaviour of loop unrolling on processors with low overhead branching available
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; NLOB-LABEL: for.body{{.*}}.prol:
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; NLOB-COUNT-1: fmul fast float
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; NLOB-LABEL: for.body{{.*}}.prol.1:
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; NLOB-COUNT-1: fmul fast float
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; NLOB-LABEL: for.body{{.*}}.prol.2:
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; NLOB-COUNT-1: fmul fast float
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; NLOB-LABEL: for.body{{.*}}:
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; NLOB-COUNT-4: fmul fast float
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; NLOB-NOT: fmul fast float
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; LOB-LABEL: for.body{{.*}}:
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; LOB: fmul fast float
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; LOB-NOT: fmul fast float
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; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite)
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define dso_local void @test(i32 noundef %n, ptr nocapture noundef %pA) local_unnamed_addr #0 {
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entry:
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%cmp46 = icmp sgt i32 %n, 0
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br i1 %cmp46, label %for.body, label %for.cond.cleanup
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for.cond.loopexit: ; preds = %for.cond6.for.cond.cleanup8_crit_edge.us, %for.body
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%exitcond49.not = icmp eq i32 %add, %n
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br i1 %exitcond49.not, label %for.cond.cleanup, label %for.body, !llvm.loop !0
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for.cond.cleanup: ; preds = %for.cond.loopexit, %entry
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ret void
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for.body: ; preds = %entry, %for.cond.loopexit
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%k.047 = phi i32 [ %add, %for.cond.loopexit ], [ 0, %entry ]
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%add = add nuw nsw i32 %k.047, 1
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%cmp244 = icmp slt i32 %add, %n
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br i1 %cmp244, label %for.cond6.preheader.lr.ph, label %for.cond.loopexit
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for.cond6.preheader.lr.ph: ; preds = %for.body
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%invariant.gep = getelementptr float, ptr %pA, i32 %k.047
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br label %for.cond6.preheader.us
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for.cond6.preheader.us: ; preds = %for.cond6.for.cond.cleanup8_crit_edge.us, %for.cond6.preheader.lr.ph
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%w.045.us = phi i32 [ %add, %for.cond6.preheader.lr.ph ], [ %inc19.us, %for.cond6.for.cond.cleanup8_crit_edge.us ]
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%mul.us = mul nuw nsw i32 %w.045.us, %n
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%0 = getelementptr float, ptr %pA, i32 %mul.us
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%arrayidx.us = getelementptr float, ptr %0, i32 %k.047
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br label %for.body9.us
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for.body9.us: ; preds = %for.cond6.preheader.us, %for.body9.us
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%x.043.us = phi i32 [ %add, %for.cond6.preheader.us ], [ %inc.us, %for.body9.us ]
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%1 = load float, ptr %arrayidx.us, align 4
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%mul11.us = mul nuw nsw i32 %x.043.us, %n
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%gep.us = getelementptr float, ptr %invariant.gep, i32 %mul11.us
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%2 = load float, ptr %gep.us, align 4
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%mul14.us = fmul fast float %2, %1
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%arrayidx17.us = getelementptr float, ptr %0, i32 %x.043.us
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store float %mul14.us, ptr %arrayidx17.us, align 4
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%inc.us = add nuw nsw i32 %x.043.us, 1
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%exitcond.not = icmp eq i32 %inc.us, %n
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br i1 %exitcond.not, label %for.cond6.for.cond.cleanup8_crit_edge.us, label %for.body9.us
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for.cond6.for.cond.cleanup8_crit_edge.us: ; preds = %for.body9.us
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%inc19.us = add nuw nsw i32 %w.045.us, 1
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%exitcond48.not = icmp eq i32 %inc19.us, %n
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br i1 %exitcond48.not, label %for.cond.loopexit, label %for.cond6.preheader.us
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}
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!0 = distinct !{!0, !1, !2}
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!1 = !{!"llvm.loop.mustprogress"}
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!2 = !{!"llvm.loop.unroll.disable"}
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