derek.holloway
7502bf64a4
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100 lines
2.0 KiB
LLVM
100 lines
2.0 KiB
LLVM
; RUN: opt < %s -passes=gvn-sink -S | FileCheck %s
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; Check that nonnull metadata for non-dominating loads is not propagated.
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; CHECK-LABEL: @test1(
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; CHECK-LABEL: if.end:
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; CHECK: %[[ptr:.*]] = phi ptr
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; CHECK: %[[load:.*]] = load ptr, ptr %[[ptr]]
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; CHECK-NOT: !nonnull
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; CHECK: ret ptr %[[load]]
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define ptr @test1(i1 zeroext %flag, ptr %p) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%a = load ptr, ptr %p
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%aa = load ptr, ptr %a, !nonnull !0
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br label %if.end
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if.else:
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%b = load ptr, ptr %p
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%bb= load ptr, ptr %b
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br label %if.end
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if.end:
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%c = phi ptr [ %aa, %if.then ], [ %bb, %if.else ]
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ret ptr %c
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}
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; CHECK-LABEL: @test2(
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; CHECK-LABEL: if.end:
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; CHECK: %[[ptr:.*]] = phi ptr
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; CHECK: %[[load:.*]] = load ptr, ptr %[[ptr]]
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; CHECK-NOT: !nonnull
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; CHECK: ret ptr %[[load]]
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define ptr @test2(i1 zeroext %flag, ptr %p) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%a = load ptr, ptr %p
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%aa = load ptr, ptr %a
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br label %if.end
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if.else:
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%b = load ptr, ptr %p
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%bb= load ptr, ptr %b, !nonnull !0
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br label %if.end
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if.end:
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%c = phi ptr [ %aa, %if.then ], [ %bb, %if.else ]
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ret ptr %c
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}
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; Check that nontemporal markings are propagated if both original stores are
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; marked.
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; CHECK-LABEL: @nontemporal(
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; CHECK-LABEL: if.end:
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; CHECK: !nontemporal
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; CHECK: ret void
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define void @nontemporal(i1 zeroext %flag, ptr %p) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%a = load ptr, ptr %p
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store ptr %p, ptr %a, align 8, !nontemporal !1
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br label %if.end
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if.else:
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%b = load ptr, ptr %p
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store ptr %p, ptr %b, align 8, !nontemporal !1
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br label %if.end
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if.end:
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ret void
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}
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; CHECK-LABEL: @nontemporal_mismatch(
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; CHECK-NOT: !nontemporal
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define void @nontemporal_mismatch(i1 zeroext %flag, ptr %p) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%a = load ptr, ptr %p
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store ptr %p, ptr %a, align 8
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br label %if.end
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if.else:
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%b = load ptr, ptr %p
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store ptr %p, ptr %b, align 8, !nontemporal !1
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br label %if.end
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if.end:
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ret void
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}
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!0 = !{}
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!1 = !{i32 1}
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