115 lines
3.0 KiB
LLVM
115 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=dse -S | FileCheck %s
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target datalayout = "e-p:64:64:64"
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declare void @free(ptr nocapture) allockind("free")
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declare noalias ptr @malloc(i64) allockind("alloc,uninitialized")
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define void @test(ptr %Q, ptr %P) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: tail call void @free(ptr [[P:%.*]]) [[ATTR0:#.*]]
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; CHECK-NEXT: ret void
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;
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%DEAD = load i32, ptr %Q ; <i32> [#uses=1]
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store i32 %DEAD, ptr %P
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tail call void @free(ptr %P) nounwind
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ret void
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}
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define void @test2(ptr %P) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: tail call void @free(ptr [[P:%.*]]) [[ATTR0]]
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; CHECK-NEXT: ret void
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;
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%Q = getelementptr {i32, i32}, ptr %P, i32 0, i32 1
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store i32 4, ptr %Q
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tail call void @free(ptr %P) nounwind
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ret void
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}
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define void @test3() {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[M:%.*]] = call ptr @malloc(i64 24)
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; CHECK-NEXT: call void @free(ptr [[M]]) [[ATTR0]]
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; CHECK-NEXT: ret void
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;
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%m = call ptr @malloc(i64 24)
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store i8 0, ptr %m
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%m1 = getelementptr i8, ptr %m, i64 1
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store i8 1, ptr %m1
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call void @free(ptr %m) nounwind
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ret void
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}
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; PR11240
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define void @test4(i1 %x) nounwind {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ALLOC1:%.*]] = tail call noalias ptr @malloc(i64 4) [[ATTR0]]
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; CHECK-NEXT: br i1 [[X:%.*]], label [[SKIPINIT1:%.*]], label [[INIT1:%.*]]
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; CHECK: init1:
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; CHECK-NEXT: br label [[SKIPINIT1]]
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; CHECK: skipinit1:
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; CHECK-NEXT: tail call void @free(ptr [[ALLOC1]]) [[ATTR0]]
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; CHECK-NEXT: ret void
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;
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entry:
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%alloc1 = tail call noalias ptr @malloc(i64 4) nounwind
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br i1 %x, label %skipinit1, label %init1
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init1:
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store i8 1, ptr %alloc1
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br label %skipinit1
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skipinit1:
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tail call void @free(ptr %alloc1) nounwind
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ret void
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}
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define void @test5() {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: br label [[BB:%.*]]
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; CHECK: bb:
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; CHECK-NEXT: tail call void @free(ptr undef) [[ATTR0]]
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; CHECK-NEXT: br label [[BB]]
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;
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br label %bb
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bb:
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tail call void @free(ptr undef) nounwind
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br label %bb
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}
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%struct = type { i32 , i32 }
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; Test case inspired by PR48036.
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define void @delete_field_after(ptr %ptr) {
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;
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; CHECK-LABEL: @delete_field_after(
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; CHECK-NEXT: [[PTR_F0:%.*]] = getelementptr [[STRUCT:%.*]], ptr [[PTR:%.*]], i32 1
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; CHECK-NEXT: [[PTR_F1:%.*]] = getelementptr [[STRUCT]], ptr [[PTR]], i32 0, i32 1
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; CHECK-NEXT: store i32 0, ptr [[PTR_F1]], align 4
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; CHECK-NEXT: call void @free(ptr [[PTR_F0]])
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; CHECK-NEXT: ret void
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;
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%ptr.f0 = getelementptr %struct, ptr %ptr, i32 1
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%ptr.f1 = getelementptr %struct, ptr %ptr, i32 0, i32 1
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store i32 0, ptr %ptr.f1
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call void @free(ptr %ptr.f0)
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ret void
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}
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; Test case inspired by PR48036.
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define void @delete_field_before(ptr %ptr) {
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; CHECK-LABEL: @delete_field_before(
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; CHECK-NEXT: call void @free(ptr [[PTR:%.*]])
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; CHECK-NEXT: ret void
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;
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%ptr.f1 = getelementptr %struct, ptr %ptr, i32 1, i32 1
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store i32 0, ptr %ptr.f1
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call void @free(ptr %ptr)
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ret void
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}
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