Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/branch-alias.ll

@@ -1,73 +0,0 @@
-; Makes sure that we give up on some pathological cases with inttoptr/ptrtoint
-;
-; @ptr_test was generated from the following C code:
-;  void ptr_test() {
-;    int* A;
-;    unsigned long RefCopy = 0;
-;    for (int i = 0; i < 8*sizeof(&A); ++i) {
-;      if ((unsigned long)&A & (1UL << i))
-;        RefCopy |= 1UL << i;
-;    }
-;
-;    int** AliasA1 = (int**)RefCopy;
-;    int* ShouldAliasA = *AliasA1;
-;  }
-
-; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-may-aliases -disable-output 2>&1 | FileCheck %s
-
-; CHECK: Function: ptr_test
-define void @ptr_test() #0 {
-  ; CHECK: MayAlias: i32** %A, i32** %ShouldAliasA
-  ; CHECK-NOT: %AliasA1
-entry:
-  %A = alloca i32*, align 8
-  %RefCopy = alloca i64, align 8
-  %i = alloca i32, align 4
-  %AliasA1 = alloca i32**, align 8
-  %ShouldAliasA = alloca i32*, align 8
-  store i64 0, i64* %RefCopy, align 8
-  store i32 0, i32* %i, align 4
-  br label %for.cond
-
-for.cond:                                         ; preds = %for.inc, %entry
-  %0 = load i32, i32* %i, align 4
-  %conv = sext i32 %0 to i64
-  %cmp = icmp ult i64 %conv, 64
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:                                         ; preds = %for.cond
-  %1 = ptrtoint i32** %A to i64
-  %2 = load i32, i32* %i, align 4
-  %sh_prom = zext i32 %2 to i64
-  %shl = shl i64 1, %sh_prom
-  %and = and i64 %1, %shl
-  %tobool = icmp ne i64 %and, 0
-  br i1 %tobool, label %if.then, label %if.end
-
-if.then:                                          ; preds = %for.body
-  %3 = load i32, i32* %i, align 4
-  %sh_prom2 = zext i32 %3 to i64
-  %shl3 = shl i64 1, %sh_prom2
-  %4 = load i64, i64* %RefCopy, align 8
-  %or = or i64 %4, %shl3
-  store i64 %or, i64* %RefCopy, align 8
-  br label %if.end
-
-if.end:                                           ; preds = %if.then, %for.body
-  br label %for.inc
-
-for.inc:                                          ; preds = %if.end
-  %5 = load i32, i32* %i, align 4
-  %inc = add nsw i32 %5, 1
-  store i32 %inc, i32* %i, align 4
-  br label %for.cond
-
-for.end:                                          ; preds = %for.cond
-  %6 = load i64, i64* %RefCopy, align 8
-  %7 = inttoptr i64 %6 to i32**
-  store i32** %7, i32*** %AliasA1, align 8
-  %8 = load i32**, i32*** %AliasA1, align 8
-  %9 = load i32*, i32** %8, align 8
-  store i32* %9, i32** %ShouldAliasA, align 8
-  ret void
-}