cf328ff96d
Implements the core/target-agnostic components of Memory Model Relaxation Annotations. RFC: https://discourse.llvm.org/t/rfc-mmras-memory-model-relaxation-annotations/76361/5
32 lines
1.2 KiB
LLVM
32 lines
1.2 KiB
LLVM
; RUN: opt -S -passes=verify < %s
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; This file contains MMRA metadata that is okay and should pass the verifier.
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define void @test(ptr %ptr) {
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%ld = load i8, ptr %ptr, !mmra !0
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store i8 1, ptr %ptr, !mmra !1
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call void @writesMem(), !mmra !2
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call void @readsMem(), !mmra !2
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fence release, !mmra !0
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%rmw.1 = atomicrmw add ptr %ptr, i8 0 release, !mmra !0
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%rmw.2 = atomicrmw add ptr %ptr, i8 0 acquire, !mmra !0
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%pair = cmpxchg ptr %ptr, i8 0, i8 1 acquire acquire, !mmra !1
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%ld.atomic = load atomic i8, ptr %ptr acquire, align 4, !mmra !1
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store atomic i8 1, ptr %ptr release, align 4, !mmra !2
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%mld = call <2 x i64> @llvm.vp.load.v2i64.p0(ptr undef, <2 x i1> undef, i32 undef), !mmra !2
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; TODO: barrier
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ret void
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}
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declare <2 x i64> @llvm.vp.load.v2i64.p0(ptr, <2 x i1>, i32)
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declare void @readsMem(ptr) #0
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declare void @writesMem(ptr) #1
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attributes #0 = { memory(read) }
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attributes #1 = { memory(write) }
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!0 = !{!"scope", !"workgroup"}
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!1 = !{!"as", !"private"}
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!2 = !{!0, !1}
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