63 lines
2.0 KiB
LLVM
63 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -gvn < %s | FileCheck %s
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; Phi translation of %gep.j cannot use %gep.i, which is located in a context
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; where %i != 0, and would result in incorrect NoAlias results in a context
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; where %i == 0 may hold.
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define i32 @test(i64 %i, i1 %c1, i1 %c2) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PTR:%.*]] = alloca [2 x i32], align 4
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; CHECK-NEXT: br i1 [[C1:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: br i1 [[C2:%.*]], label [[IF2:%.*]], label [[ELSE2:%.*]]
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; CHECK: if2:
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; CHECK-NEXT: store i32 1, ptr [[PTR]], align 4
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; CHECK-NEXT: [[GEP_J_PHI_TRANS_INSERT:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i64 [[I:%.*]]
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; CHECK-NEXT: [[V_PRE:%.*]] = load i32, ptr [[GEP_J_PHI_TRANS_INSERT]], align 4
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; CHECK-NEXT: br label [[JOIN:%.*]]
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; CHECK: else2:
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; CHECK-NEXT: store i32 2, ptr [[PTR]], align 4
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; CHECK-NEXT: br label [[JOIN]]
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; CHECK: join:
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; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[V_PRE]], [[IF2]] ], [ 2, [[ELSE2]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i64 [ [[I]], [[IF2]] ], [ 0, [[ELSE2]] ]
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; CHECK-NEXT: [[GEP_J:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i64 [[J]]
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; CHECK-NEXT: ret i32 [[V]]
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; CHECK: else:
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i64 [[I]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[GEP_I:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i64 [[I]]
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%ptr = alloca [2 x i32]
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br i1 %c1, label %if, label %else
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if:
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br i1 %c2, label %if2, label %else2
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if2:
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store i32 1, ptr %ptr
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br label %join
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else2:
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store i32 2, ptr %ptr
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br label %join
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join:
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%j = phi i64 [ %i, %if2 ], [ 0, %else2 ]
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%gep.j = getelementptr inbounds i32, ptr %ptr, i64 %j
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%v = load i32, ptr %gep.j
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ret i32 %v
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else:
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%cmp = icmp ne i64 %i, 0
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call void @llvm.assume(i1 %cmp)
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%gep.i = getelementptr inbounds i32, ptr %ptr, i64 %i
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ret i32 0
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}
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declare void @llvm.assume(i1)
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