45 lines
1.4 KiB
LLVM
45 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=gvn -S < %s | FileCheck %s
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; Check that PRE-LOAD across backedge does not
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; result in invalid dominator tree.
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declare void @use(i32)
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define void @test1(i1 %c, i32 %arg) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[DOTBB2_CRIT_EDGE:%.*]]
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; CHECK: .bb2_crit_edge:
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; CHECK-NEXT: [[DOTPRE:%.*]] = shl i32 [[ARG:%.*]], 2
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; CHECK-NEXT: br label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[SHL1:%.*]] = shl i32 [[ARG]], 2
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[SHL2_PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[DOTBB2_CRIT_EDGE]] ], [ [[SHL3:%.*]], [[BB3]] ]
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; CHECK-NEXT: call void @use(i32 [[SHL2_PRE_PHI]])
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[SHL3]] = shl i32 [[ARG]], 2
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr null, i32 [[SHL3]]
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; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[GEP]], align 4
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; CHECK-NEXT: call void @use(i32 [[V]])
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; CHECK-NEXT: br label [[BB2]]
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;
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br i1 %c, label %bb1, label %bb2
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bb1:
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%shl1 = shl i32 %arg, 2
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br label %bb3
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bb2:
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%shl2 = shl i32 %arg, 2
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call void @use(i32 %shl2)
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br label %bb3
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bb3:
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%shl3 = shl i32 %arg, 2
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%gep = getelementptr i32, ptr null, i32 %shl3
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%v = load i32, ptr %gep, align 4
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call void @use(i32 %v)
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br label %bb2
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}
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