41 lines
875 B
LLVM
41 lines
875 B
LLVM
; RUN: opt -basicaa -dse -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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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, %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, 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-LABEL: 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-LABEL: 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, 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-LABEL: 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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