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c1be92f3bb
does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
778 B
LLVM
40 lines
778 B
LLVM
; RUN: opt %s -basicaa -dse -S | FileCheck %s
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%t = type { i32 }
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@g = global i32 42
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define void @test1(%t* noalias %pp) {
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%p = getelementptr inbounds %t* %pp, i32 0, i32 0
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store i32 1, i32* %p; <-- This is dead
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%x = load i32* inttoptr (i32 12345 to i32*)
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store i32 %x, i32* %p
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ret void
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; CHECK: define void @test1
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; CHECK: store
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; CHECK-NOT: store
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; CHECK: ret void
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}
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define void @test3() {
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store i32 1, i32* @g; <-- This is dead.
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store i32 42, i32* @g
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ret void
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; CHECK: define void @test3
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; CHECK: store
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; CHECK-NOT: store
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; CHECK: ret void
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}
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define void @test4(i32* %p) {
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store i32 1, i32* %p
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%x = load i32* @g; <-- %p and @g could alias
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store i32 %x, i32* %p
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ret void
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; CHECK: define void @test4
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; CHECK: store
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; CHECK: store
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; CHECK: ret void
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}
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