357 lines
12 KiB
LLVM
357 lines
12 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-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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declare void @unknown_func()
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declare void @llvm.lifetime.start.p0(i64, ptr nocapture) nounwind
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture) nounwind
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i32, i1) nounwind
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declare noalias ptr @calloc(i64, i64) #5
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declare noalias ptr @malloc(i64) #0
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declare noalias ptr @strdup(ptr nocapture readonly) #1
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declare void @free(ptr nocapture) #2
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define void @test16(ptr noalias %P) {
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; CHECK-LABEL: @test16(
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; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: call void @free(ptr [[P:%.*]])
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; CHECK-NEXT: store i32 1, ptr [[P]], align 4
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; CHECK-NEXT: ret void
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;
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store i32 1, ptr %P
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br i1 true, label %bb1, label %bb3
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bb1:
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store i32 1, ptr %P
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br label %bb3
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bb3:
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call void @free(ptr %P)
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store i32 1, ptr %P
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ret void
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}
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; We cannot remove the store in the entry block, because @unknown_func could
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; unwind and the stored value could be read by the caller.
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define void @test17(ptr noalias %P) {
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; CHECK-LABEL: @test17(
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; CHECK-NEXT: store i32 1, ptr [[P:%.*]], align 4
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; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: call void @unknown_func()
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: call void @free(ptr [[P]])
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; CHECK-NEXT: ret void
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;
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store i32 1, ptr %P
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br i1 true, label %bb1, label %bb3
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bb1:
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call void @unknown_func()
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store i32 1, ptr %P
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br label %bb3
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bb3:
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call void @free(ptr %P)
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ret void
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}
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define void @test17_read_after_free(ptr noalias %P) {
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; CHECK-LABEL: @test17_read_after_free(
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; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: call void @free(ptr [[P:%.*]])
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; CHECK-NEXT: [[LV:%.*]] = load i8, ptr [[P]], align 1
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; CHECK-NEXT: ret void
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;
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store i32 1, ptr %P
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br i1 true, label %bb1, label %bb3
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bb1:
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store i32 1, ptr %P
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br label %bb3
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bb3:
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call void @free(ptr %P)
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%lv = load i8, ptr %P
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ret void
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}
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define void @test19(ptr noalias %P) {
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; CHECK-LABEL: @test19(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARRAYIDX0:%.*]] = getelementptr inbounds i32, ptr [[P:%.*]], i64 1
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[ARRAYIDX0]], i8 0, i64 28, i1 false)
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; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, ptr [[P]], i64 1
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; CHECK-NEXT: store i32 1, ptr [[ARRAYIDX1]], align 4
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: ret void
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;
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entry:
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%arrayidx0 = getelementptr inbounds i32, ptr %P, i64 1
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call void @llvm.memset.p0.i64(ptr %arrayidx0, i8 0, i64 28, i32 4, i1 false)
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br i1 true, label %bb1, label %bb2
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bb1:
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br label %bb3
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bb2:
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%arrayidx1 = getelementptr inbounds i32, ptr %P, i64 1
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store i32 1, ptr %arrayidx1, align 4
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br label %bb3
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bb3:
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ret void
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}
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define void @test20(ptr noalias %P) {
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; CHECK-LABEL: @test20(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARRAYIDX0:%.*]] = getelementptr inbounds i32, ptr [[P:%.*]], i64 1
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds i8, ptr [[ARRAYIDX0]], i64 4
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[TMP0]], i8 0, i64 24, i1 false)
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; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, ptr [[P]], i64 1
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; CHECK-NEXT: store i32 1, ptr [[ARRAYIDX1]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%arrayidx0 = getelementptr inbounds i32, ptr %P, i64 1
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call void @llvm.memset.p0.i64(ptr %arrayidx0, i8 0, i64 28, i32 4, i1 false)
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br i1 true, label %bb1, label %bb2
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bb1:
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br label %bb3
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bb2:
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br label %bb3
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bb3:
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%arrayidx1 = getelementptr inbounds i32, ptr %P, i64 1
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store i32 1, ptr %arrayidx1, align 4
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ret void
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}
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define ptr @test26() {
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; CHECK-LABEL: @test26(
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; CHECK-NEXT: bb1:
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; CHECK-NEXT: br i1 true, label [[BB2:%.*]], label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[M:%.*]] = call noalias ptr @malloc(i64 10)
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; CHECK-NEXT: store i8 1, ptr [[M]], align 1
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[R:%.*]] = phi ptr [ null, [[BB1:%.*]] ], [ [[M]], [[BB2]] ]
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; CHECK-NEXT: ret ptr [[R]]
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;
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bb1:
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br i1 true, label %bb2, label %bb3
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bb2:
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%m = call noalias ptr @malloc(i64 10)
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store i8 1, ptr %m
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br label %bb3
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bb3:
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%r = phi ptr [ null, %bb1 ], [ %m, %bb2 ]
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ret ptr %r
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}
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define void @test27() {
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; CHECK-LABEL: @test27(
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; CHECK-NEXT: bb1:
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; CHECK-NEXT: br i1 true, label [[BB2:%.*]], label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[M:%.*]] = call noalias ptr @malloc(i64 10)
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[R:%.*]] = phi ptr [ null, [[BB1:%.*]] ], [ [[M]], [[BB2]] ]
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; CHECK-NEXT: ret void
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;
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bb1:
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br i1 true, label %bb2, label %bb3
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bb2:
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%m = call noalias ptr @malloc(i64 10)
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store i8 1, ptr %m
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br label %bb3
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bb3:
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%r = phi ptr [ null, %bb1 ], [ %m, %bb2 ]
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ret void
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}
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define ptr @test27_pointer_escape() {
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; CHECK-LABEL: @test27_pointer_escape(
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; CHECK-NEXT: bb1:
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; CHECK-NEXT: br i1 true, label [[BB2:%.*]], label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[M:%.*]] = call noalias ptr @malloc(i64 10)
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; CHECK-NEXT: store i8 1, ptr [[M]], align 1
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[R:%.*]] = phi ptr [ null, [[BB1:%.*]] ], [ [[M]], [[BB2]] ]
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; CHECK-NEXT: ret ptr [[R]]
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;
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bb1:
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br i1 true, label %bb2, label %bb3
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bb2:
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%m = call noalias ptr @malloc(i64 10)
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store i8 1, ptr %m
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br label %bb3
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bb3:
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%r = phi ptr [ null, %bb1 ], [ %m, %bb2 ]
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ret ptr %r
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}
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define ptr @test28() {
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; CHECK-LABEL: @test28(
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; CHECK-NEXT: bb0:
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; CHECK-NEXT: [[M:%.*]] = call noalias ptr @malloc(i64 10)
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; CHECK-NEXT: store i8 2, ptr [[M]], align 1
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; CHECK-NEXT: ret ptr [[M]]
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;
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bb0:
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%m = call noalias ptr @malloc(i64 10)
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store i8 2, ptr %m
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ret ptr %m
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}
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%struct.SystemCallMapElementStruct = type { ptr, i32, ptr }
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%struct.NodePtrVecStruct = type { i32, i32, ptr }
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%struct.NodeStruct = type { i32, i32, ptr, i32, i32, ptr, ptr, ptr, i32, i32 }
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%struct.NodeListStruct = type { ptr, ptr }
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%struct.EdgeListStruct = type { i32, ptr, ptr }
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%struct.SystemCallMapStruct = type { i32, i32, ptr }
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declare ptr @NodePtrVec_new(i32)
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define noalias ptr @SystemCallMapElement_new(ptr nocapture readonly %label, i32 %initialSize) {
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; CHECK-LABEL: @SystemCallMapElement_new(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CALL:%.*]] = tail call dereferenceable_or_null(24) ptr @malloc(i64 24) #[[ATTR7:[0-9]+]]
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq ptr [[CALL]], null
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; CHECK-NEXT: br i1 [[TOBOOL]], label [[CLEANUP:%.*]], label [[IF_THEN:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[CALL1:%.*]] = tail call ptr @strdup(ptr [[LABEL:%.*]])
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; CHECK-NEXT: store ptr [[CALL1]], ptr [[CALL]], align 8
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; CHECK-NEXT: [[INDEX:%.*]] = getelementptr inbounds i8, ptr [[CALL]], i64 8
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; CHECK-NEXT: store i32 -1, ptr [[INDEX]], align 8
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; CHECK-NEXT: [[TOBOOL4:%.*]] = icmp eq ptr [[CALL1]], null
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; CHECK-NEXT: br i1 [[TOBOOL4]], label [[IF_THEN5:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then5:
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; CHECK-NEXT: tail call void @free(ptr nonnull [[CALL]])
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: if.end:
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; CHECK-NEXT: [[CALL6:%.*]] = tail call ptr @NodePtrVec_new(i32 [[INITIALSIZE:%.*]]) #[[ATTR5:[0-9]+]]
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; CHECK-NEXT: [[NODES:%.*]] = getelementptr inbounds i8, ptr [[CALL]], i64 16
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; CHECK-NEXT: store ptr [[CALL6]], ptr [[NODES]], align 8
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; CHECK-NEXT: [[TOBOOL8:%.*]] = icmp eq ptr [[CALL6]], null
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; CHECK-NEXT: br i1 [[TOBOOL8]], label [[IF_THEN9:%.*]], label [[CLEANUP]]
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; CHECK: if.then9:
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; CHECK-NEXT: tail call void @free(ptr nonnull [[CALL]])
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: cleanup:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = phi ptr [ null, [[IF_THEN9]] ], [ null, [[IF_THEN5]] ], [ [[CALL]], [[IF_END]] ], [ [[CALL]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret ptr [[RETVAL_0]]
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;
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entry:
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%call = tail call dereferenceable_or_null(24) ptr @malloc(i64 24) #4
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%tobool = icmp eq ptr %call, null
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br i1 %tobool, label %cleanup, label %if.then
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if.then: ; preds = %entry
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%call1 = tail call ptr @strdup(ptr %label)
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store ptr %call1, ptr %call, align 8
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%index = getelementptr inbounds i8, ptr %call, i64 8
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store i32 -1, ptr %index, align 8
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%tobool4 = icmp eq ptr %call1, null
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br i1 %tobool4, label %if.then5, label %if.end
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if.then5: ; preds = %if.then
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tail call void @free(ptr nonnull %call)
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br label %cleanup
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if.end: ; preds = %if.then
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%call6 = tail call ptr @NodePtrVec_new(i32 %initialSize) #2
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%nodes = getelementptr inbounds i8, ptr %call, i64 16
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store ptr %call6, ptr %nodes, align 8
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%tobool8 = icmp eq ptr %call6, null
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br i1 %tobool8, label %if.then9, label %cleanup
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if.then9: ; preds = %if.end
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tail call void @free(ptr nonnull %call)
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br label %cleanup
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cleanup: ; preds = %entry, %if.end, %if.then9, %if.then5
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%retval.0 = phi ptr [ null, %if.then9 ], [ null, %if.then5 ], [ %call, %if.end ], [ %call, %entry ]
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ret ptr %retval.0
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}
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%struct.BitfieldStruct = type { i32, ptr }
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define noalias ptr @Bitfield_new(i32 %bitsNeeded) {
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; CHECK-LABEL: @Bitfield_new(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CALL:%.*]] = tail call dereferenceable_or_null(16) ptr @malloc(i64 16) #[[ATTR7]]
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq ptr [[CALL]], null
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; CHECK-NEXT: br i1 [[TOBOOL]], label [[CLEANUP:%.*]], label [[IF_END:%.*]]
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; CHECK: if.end:
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[BITSNEEDED:%.*]], 7
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[ADD]], 8
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; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[DIV]] to i64
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; CHECK-NEXT: [[CALL1:%.*]] = tail call ptr @calloc(i64 [[CONV]], i64 1) #[[ATTR8:[0-9]+]]
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; CHECK-NEXT: [[BITFIELD:%.*]] = getelementptr inbounds i8, ptr [[CALL]], i64 8
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; CHECK-NEXT: store ptr [[CALL1]], ptr [[BITFIELD]], align 8
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; CHECK-NEXT: [[TOBOOL3:%.*]] = icmp eq ptr [[CALL1]], null
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; CHECK-NEXT: br i1 [[TOBOOL3]], label [[IF_THEN4:%.*]], label [[IF_END5:%.*]]
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; CHECK: if.then4:
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; CHECK-NEXT: tail call void @free(ptr nonnull [[CALL]])
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: if.end5:
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; CHECK-NEXT: store i32 [[BITSNEEDED]], ptr [[CALL]], align 8
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: cleanup:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = phi ptr [ [[CALL]], [[IF_END5]] ], [ null, [[IF_THEN4]] ], [ null, [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret ptr [[RETVAL_0]]
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;
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entry:
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%call = tail call dereferenceable_or_null(16) ptr @malloc(i64 16) #4
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%tobool = icmp eq ptr %call, null
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br i1 %tobool, label %cleanup, label %if.end
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if.end: ; preds = %entry
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%add = add nsw i32 %bitsNeeded, 7
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%div = sdiv i32 %add, 8
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%conv = sext i32 %div to i64
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%call1 = tail call ptr @calloc(i64 %conv, i64 1) #3
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%bitfield = getelementptr inbounds i8, ptr %call, i64 8
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store ptr %call1, ptr %bitfield, align 8
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%tobool3 = icmp eq ptr %call1, null
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br i1 %tobool3, label %if.then4, label %if.end5
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if.then4: ; preds = %if.end
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tail call void @free(ptr nonnull %call)
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br label %cleanup
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if.end5: ; preds = %if.end
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store i32 %bitsNeeded, ptr %call, align 8
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br label %cleanup
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cleanup: ; preds = %entry, %if.end5, %if.then4
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%retval.0 = phi ptr [ %call, %if.end5 ], [ null, %if.then4 ], [ null, %entry ]
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ret ptr %retval.0
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}
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attributes #0 = { nofree nounwind allocsize(0) allockind("alloc,uninitialized") }
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attributes #1 = { nofree nounwind }
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attributes #2 = { nounwind allockind("free") }
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attributes #3 = { allocsize(0,1) }
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attributes #4 = { allocsize(0) }
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attributes #5 = { nofree nounwind allocsize(0,1) allockind("alloc,zeroed") }
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