forked from OSchip/llvm-project
30 lines
870 B
LLVM
30 lines
870 B
LLVM
; RUN: llvm-as < %s | opt -indvars -loop-deletion | llvm-dis | grep phi | count 1
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; Indvars should be able to evaluate this loop, allowing loop deletion
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; to delete it.
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define i32 @test(i32 %x_offs) nounwind readnone {
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entry:
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%0 = icmp sgt i32 %x_offs, 4 ; <i1> [#uses=1]
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br i1 %0, label %bb.nph, label %bb2
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%x_offs_addr.01 = phi i32 [ %1, %bb1 ], [ %x_offs, %bb.nph ] ; <i32> [#uses=1]
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%1 = add i32 %x_offs_addr.01, -4 ; <i32> [#uses=3]
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br label %bb1
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bb1: ; preds = %bb
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%2 = icmp sgt i32 %1, 4 ; <i1> [#uses=1]
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br i1 %2, label %bb, label %bb1.bb2_crit_edge
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bb1.bb2_crit_edge: ; preds = %bb1
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br label %bb2
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bb2: ; preds = %bb1.bb2_crit_edge, %entry
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%x_offs_addr.0.lcssa = phi i32 [ %1, %bb1.bb2_crit_edge ], [ %x_offs, %entry ] ; <i32> [#uses=1]
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ret i32 %x_offs_addr.0.lcssa
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}
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