forked from OSchip/llvm-project
72 lines
2.0 KiB
LLVM
72 lines
2.0 KiB
LLVM
; RUN: opt < %s -indvars -S | FileCheck %s
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; RUN: opt -lcssa -loop-simplify -S < %s | opt -S -passes='require<targetir>,require<scalar-evolution>,require<domtree>,loop(indvars)'
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; Provide legal integer types.
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target datalayout = "n8:16:32:64"
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target triple = "x86_64-apple-darwin"
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; CHECK-LABEL: @loop_0
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; CHECK-LABEL: B18:
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; Only one phi now.
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; CHECK: phi
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; CHECK-NOT: phi
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; One trunc for the gep.
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; CHECK: trunc i64 %indvars.iv to i32
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; One trunc for the dummy() call.
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; CHECK-LABEL: exit24:
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; CHECK: trunc i64 {{.*}}lcssa.wide to i32
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define void @loop_0(i32* %a) {
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Prologue:
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br i1 undef, label %B18, label %B6
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B18: ; preds = %B24, %Prologue
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%.02 = phi i32 [ 0, %Prologue ], [ %tmp33, %B24 ]
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%tmp23 = zext i32 %.02 to i64
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%tmp33 = add i32 %.02, 1
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%o = getelementptr i32, i32* %a, i32 %.02
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%v = load i32, i32* %o
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%t = icmp eq i32 %v, 0
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br i1 %t, label %exit24, label %B24
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B24: ; preds = %B18
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%t2 = icmp eq i32 %tmp33, 20
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br i1 %t2, label %B6, label %B18
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B6: ; preds = %Prologue
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ret void
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exit24: ; preds = %B18
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call void @dummy(i32 %.02)
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unreachable
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}
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define void @loop_1(i32 %lim) {
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; CHECK-LABEL: @loop_1(
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entry:
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%entry.cond = icmp ne i32 %lim, 0
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br i1 %entry.cond, label %loop, label %leave
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loop:
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; CHECK: loop:
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; CHECK: %indvars.iv = phi i64 [ 1, %loop.preheader ], [ %indvars.iv.next, %loop ]
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; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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; CHECK: [[IV_INC:%[^ ]+]] = add nsw i64 %indvars.iv, -1
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; CHECK: call void @dummy.i64(i64 [[IV_INC]])
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%iv = phi i32 [ 1, %entry ], [ %iv.inc, %loop ]
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%iv.inc = add i32 %iv, 1
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%iv.inc.sub = add i32 %iv, -1
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%iv.inc.sub.zext = zext i32 %iv.inc.sub to i64
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call void @dummy.i64(i64 %iv.inc.sub.zext)
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%be.cond = icmp ult i32 %iv.inc, %lim
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br i1 %be.cond, label %loop, label %leave
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leave:
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ret void
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}
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declare void @dummy(i32)
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declare void @dummy.i64(i64)
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