Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/DeadStoreElimination/atomic.ll

@@ -1,132 +0,0 @@
-; RUN: opt -basicaa -dse -S < %s | FileCheck %s
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-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"
-target triple = "x86_64-apple-macosx10.7.0"
-
-; Sanity tests for atomic stores.
-; Note that it turns out essentially every transformation DSE does is legal on
-; atomic ops, just some transformations are not allowed across release-acquire pairs.
-
-@x = common global i32 0, align 4
-@y = common global i32 0, align 4
-
-declare void @randomop(i32*)
-
-; DSE across unordered store (allowed)
-define void @test1() {
-; CHECK-LABEL: test1
-; CHECK-NOT: store i32 0
-; CHECK: store i32 1
-  store i32 0, i32* @x
-  store atomic i32 0, i32* @y unordered, align 4
-  store i32 1, i32* @x
-  ret void
-}
-
-; DSE remove unordered store (allowed)
-define void @test4() {
-; CHECK-LABEL: test4
-; CHECK-NOT: store atomic
-; CHECK: store i32 1
-  store atomic i32 0, i32* @x unordered, align 4
-  store i32 1, i32* @x
-  ret void
-}
-
-; DSE unordered store overwriting non-atomic store (allowed)
-define void @test5() {
-; CHECK-LABEL: test5
-; CHECK: store atomic i32 1
-  store i32 0, i32* @x
-  store atomic i32 1, i32* @x unordered, align 4
-  ret void
-}
-
-; DSE no-op unordered atomic store (allowed)
-define void @test6() {
-; CHECK-LABEL: test6
-; CHECK-NOT: store
-; CHECK: ret void
-  %x = load atomic i32, i32* @x unordered, align 4
-  store atomic i32 %x, i32* @x unordered, align 4
-  ret void
-}
-
-; DSE seq_cst store (be conservative; DSE doesn't have infrastructure
-; to reason about atomic operations).
-define void @test7() {
-; CHECK-LABEL: test7
-; CHECK: store atomic
-  %a = alloca i32
-  store atomic i32 0, i32* %a seq_cst, align 4
-  ret void
-}
-
-; DSE and seq_cst load (be conservative; DSE doesn't have infrastructure
-; to reason about atomic operations).
-define i32 @test8() {
-; CHECK-LABEL: test8
-; CHECK: store
-; CHECK: load atomic
-  %a = alloca i32
-  call void @randomop(i32* %a)
-  store i32 0, i32* %a, align 4
-  %x = load atomic i32, i32* @x seq_cst, align 4
-  ret i32 %x
-}
-
-; DSE across monotonic load (allowed as long as the eliminated store isUnordered)
-define i32 @test9() {
-; CHECK-LABEL: test9
-; CHECK-NOT: store i32 0
-; CHECK: store i32 1
-  store i32 0, i32* @x
-  %x = load atomic i32, i32* @y monotonic, align 4
-  store i32 1, i32* @x
-  ret i32 %x
-}
-
-; DSE across monotonic store (allowed as long as the eliminated store isUnordered)
-define void @test10() {
-; CHECK-LABEL: test10
-; CHECK-NOT: store i32 0
-; CHECK: store i32 1
-  store i32 0, i32* @x
-  store atomic i32 42, i32* @y monotonic, align 4
-  store i32 1, i32* @x
-  ret void
-}
-
-; DSE across monotonic load (forbidden since the eliminated store is atomic)
-define i32 @test11() {
-; CHECK-LABEL: test11
-; CHECK: store atomic i32 0
-; CHECK: store atomic i32 1
-  store atomic i32 0, i32* @x monotonic, align 4
-  %x = load atomic i32, i32* @y monotonic, align 4
-  store atomic i32 1, i32* @x monotonic, align 4
-  ret i32 %x
-}
-
-; DSE across monotonic store (forbidden since the eliminated store is atomic)
-define void @test12() {
-; CHECK-LABEL: test12
-; CHECK: store atomic i32 0
-; CHECK: store atomic i32 1
-  store atomic i32 0, i32* @x monotonic, align 4
-  store atomic i32 42, i32* @y monotonic, align 4
-  store atomic i32 1, i32* @x monotonic, align 4
-  ret void
-}
-
-; But DSE is not allowed across a release-acquire pair.
-define i32 @test15() {
-; CHECK-LABEL: test15
-; CHECK: store i32 0
-; CHECK: store i32 1
-  store i32 0, i32* @x
-  store atomic i32 0, i32* @y release, align 4
-  %x = load atomic i32, i32* @y acquire, align 4
-  store i32 1, i32* @x
-  ret i32 %x
-}