91 lines
2.8 KiB
LLVM
91 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -passes="require<globals-aa>,function(gvn,instcombine)" -S -enable-unsafe-globalsmodref-alias-results | FileCheck %s
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;
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; Note that this test relies on an unsafe feature of GlobalsModRef. While this
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; test is correct and safe, GMR's technique for handling this isn't generally.
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target datalayout = "p:32:32:32"
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@G = internal global ptr null ; <ptr> [#uses=3]
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declare noalias ptr @malloc(i32) allockind("alloc,uninitialized") allocsize(0) inaccessiblememonly
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define void @malloc_init() {
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; CHECK-LABEL: @malloc_init(
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; CHECK-NEXT: [[A:%.*]] = call dereferenceable_or_null(4) ptr @malloc(i32 4)
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; CHECK-NEXT: store ptr [[A]], ptr @G, align 4
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; CHECK-NEXT: ret void
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;
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%a = call ptr @malloc(i32 4)
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store ptr %a, ptr @G
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ret void
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}
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define i32 @malloc_test(ptr %P) {
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; CHECK-LABEL: @malloc_test(
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; CHECK-NEXT: store i32 123, ptr [[P:%.*]], align 4
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; CHECK-NEXT: ret i32 0
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;
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%g1 = load ptr, ptr @G ; <ptr> [#uses=2]
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%h1 = load i32, ptr %g1 ; <i32> [#uses=1]
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store i32 123, ptr %P
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%g2 = load ptr, ptr @G ; <ptr> [#uses=0]
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%h2 = load i32, ptr %g1 ; <i32> [#uses=1]
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%X = sub i32 %h1, %h2 ; <i32> [#uses=1]
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ret i32 %X
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}
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@G2 = internal global ptr null ; <ptr> [#uses=3]
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declare noalias ptr @calloc(i32, i32) allockind("alloc,zeroed") allocsize(0,1) inaccessiblememonly
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define void @calloc_init() {
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; CHECK-LABEL: @calloc_init(
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; CHECK-NEXT: [[A:%.*]] = call dereferenceable_or_null(4) ptr @calloc(i32 4, i32 1)
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; CHECK-NEXT: store ptr [[A]], ptr @G2, align 4
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; CHECK-NEXT: ret void
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;
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%a = call ptr @calloc(i32 4, i32 1)
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store ptr %a, ptr @G2
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ret void
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}
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define i32 @calloc_test(ptr %P) {
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; CHECK-LABEL: @calloc_test(
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; CHECK-NEXT: store i32 123, ptr [[P:%.*]], align 4
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; CHECK-NEXT: ret i32 0
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;
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%g1 = load ptr, ptr @G2 ; <ptr> [#uses=2]
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%h1 = load i32, ptr %g1 ; <i32> [#uses=1]
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store i32 123, ptr %P
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%g2 = load ptr, ptr @G2 ; <ptr> [#uses=0]
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%h2 = load i32, ptr %g1 ; <i32> [#uses=1]
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%X = sub i32 %h1, %h2 ; <i32> [#uses=1]
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ret i32 %X
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}
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@G3 = internal global ptr null ; <ptr> [#uses=3]
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declare noalias ptr @my_alloc(i32)
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define void @my_alloc_init() {
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; CHECK-LABEL: @my_alloc_init(
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; CHECK-NEXT: [[A:%.*]] = call ptr @my_alloc(i32 4)
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; CHECK-NEXT: store ptr [[A]], ptr @G3, align 4
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; CHECK-NEXT: ret void
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;
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%a = call ptr @my_alloc(i32 4)
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store ptr %a, ptr @G3
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ret void
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}
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define i32 @my_alloc_test(ptr %P) {
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; CHECK-LABEL: @my_alloc_test(
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; CHECK-NEXT: store i32 123, ptr [[P:%.*]], align 4
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; CHECK-NEXT: ret i32 0
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;
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%g1 = load ptr, ptr @G3 ; <ptr> [#uses=2]
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%h1 = load i32, ptr %g1 ; <i32> [#uses=1]
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store i32 123, ptr %P
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%g2 = load ptr, ptr @G3 ; <ptr> [#uses=0]
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%h2 = load i32, ptr %g1 ; <i32> [#uses=1]
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%X = sub i32 %h1, %h2 ; <i32> [#uses=1]
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ret i32 %X
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}
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