derek.holloway
7502bf64a4
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68 lines
2.4 KiB
LLVM
68 lines
2.4 KiB
LLVM
; This testcase consists of alias relations on 128-bit pointers that
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; should be completely resolvable by basicaa.
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; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-no-aliases -print-may-aliases -print-must-aliases -disable-output 2>&1 | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-i128:128:128-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128-p100:128:64:64-p101:128:64:64"
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; test0 is similar to SimpleCases.ll
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%T = type { i32, [10 x i8] }
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; CHECK: Function: test0
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; CHECK-NOT: MayAlias:
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define void @test0(ptr addrspace(100) %P) {
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%C = getelementptr %T, ptr addrspace(100) %P, i64 0, i32 1
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%D = getelementptr %T, ptr addrspace(100) %P, i64 0, i32 1, i64 0
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%E = getelementptr %T, ptr addrspace(100) %P, i64 0, i32 1, i64 5
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load %T, ptr addrspace(100) %P
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load i32, ptr addrspace(100) %P
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load [10 x i8], ptr addrspace(100) %C
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load i8, ptr addrspace(100) %D
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load i8, ptr addrspace(100) %E
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ret void
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}
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; test1 checks that >64 bits of index can be considered.
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; If BasicAA is truncating the arithmetic, it will conclude
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; that %A and %B must alias when in fact they must not.
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; CHECK: Function: test1
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; CHECK-NOT: MustAlias:
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; CHECK: NoAlias:
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; CHECK-SAME: %A
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; CHECK-SAME: %B
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define void @test1(ptr addrspace(100) %P, i128 %i) {
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; 1180591620717411303424 is 2**70
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; 590295810358705651712 is 2**69
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%i70 = add i128 %i, 1180591620717411303424
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%i69 = add i128 %i, 590295810358705651712
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%A = getelementptr double, ptr addrspace(100) %P, i128 %i70
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%B = getelementptr double, ptr addrspace(100) %P, i128 %i69
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load double, ptr addrspace(100) %A
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load double, ptr addrspace(100) %B
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ret void
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}
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; test2 checks that >64 bits of index can be considered
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; and computes the same address in two ways to ensure that
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; they are considered equivalent.
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; CHECK: Function: test2
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; CHECK: MustAlias:
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; CHECK-SAME: %A
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; CHECK-SAME: %C
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define void @test2(ptr addrspace(100) %P, i128 %i) {
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; 1180591620717411303424 is 2**70
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; 590295810358705651712 is 2**69
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%i70 = add i128 %i, 1180591620717411303424
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%i69 = add i128 %i, 590295810358705651712
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%j70 = add i128 %i69, 590295810358705651712
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%A = getelementptr double, ptr addrspace(100) %P, i128 %i70
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%C = getelementptr double, ptr addrspace(100) %P, i128 %j70
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load double, ptr addrspace(100) %A
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load double, ptr addrspace(100) %C
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ret void
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}
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