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1a7027b262
Please see include/llvm/Transforms/Utils/MemorySSA.h for a description of MemorySSA, and what it does. Differential Revision: http://reviews.llvm.org/D7864 llvm-svn: 259595
59 lines
1.4 KiB
LLVM
59 lines
1.4 KiB
LLVM
; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
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;
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; Test that various function attributes give us sane results.
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@g = external global i32
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declare void @readonlyFunction() readonly
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declare void @noattrsFunction()
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define void @readonlyAttr() {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* @g, align 4
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%1 = alloca i32, align 4
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* %1, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: call void @readonlyFunction()
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call void @readonlyFunction()
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: call void @noattrsFunction() #
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; Assume that #N is readonly
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call void @noattrsFunction() readonly
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; Sanity check that noattrsFunction is otherwise a MemoryDef
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; CHECK: 3 = MemoryDef(2)
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; CHECK-NEXT: call void @noattrsFunction()
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call void @noattrsFunction()
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ret void
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}
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declare void @argMemOnly(i32*) argmemonly
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define void @inaccessableOnlyAttr() {
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%1 = alloca i32, align 4
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* %1, align 4
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* @g, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: call void @argMemOnly(i32* %1) #
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; Assume that #N is readonly
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call void @argMemOnly(i32* %1) readonly
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; CHECK: 3 = MemoryDef(2)
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; CHECK-NEXT: call void @argMemOnly(i32* %1)
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call void @argMemOnly(i32* %1)
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ret void
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}
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