177 lines
4.2 KiB
LLVM
177 lines
4.2 KiB
LLVM
; RUN: opt %s -passes=newgvn -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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target triple = "x86_64-unknown-linux-gnu"
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define ptr @test1(ptr %v0, ptr %v1) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: store ptr [[V2]], ptr [[V1:%.*]]
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; CHECK-NEXT: ret ptr [[V2]]
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;
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top:
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%v2 = load ptr, ptr %v0, !nonnull !0
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store ptr %v2, ptr %v1
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%v3 = load ptr, ptr %v1
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ret ptr %v3
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}
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; FIXME: could propagate nonnull to first load?
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define ptr @test2(ptr %v0, ptr %v1) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: store ptr [[V2]], ptr [[V1:%.*]]
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; CHECK-NEXT: ret ptr [[V2]]
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;
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top:
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%v2 = load ptr, ptr %v0
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store ptr %v2, ptr %v1
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%v3 = load ptr, ptr %v1, !nonnull !0
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ret ptr %v3
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}
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declare void @use1(ptr %a) readonly
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define ptr @test3(ptr %v0) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: call void @use1(ptr [[V1]])
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: ret ptr [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret ptr [[V1]]
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;
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top:
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%v1 = load ptr, ptr %v0
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call void @use1(ptr %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load ptr, ptr %v0, !nonnull !0
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ret ptr %v2
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bb2:
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%v3 = load ptr, ptr %v0
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ret ptr %v3
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}
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define ptr @test4(ptr %v0) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: call void @use1(ptr [[V1]])
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: ret ptr [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret ptr [[V1]]
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;
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top:
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%v1 = load ptr, ptr %v0
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call void @use1(ptr %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load ptr, ptr %v0
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ret ptr %v2
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bb2:
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%v3 = load ptr, ptr %v0, !nonnull !0
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ret ptr %v3
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}
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define ptr @test5(ptr %v0) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: call void @use1(ptr [[V1]])
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: ret ptr [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret ptr [[V1]]
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;
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top:
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%v1 = load ptr, ptr %v0, !nonnull !0
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call void @use1(ptr %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load ptr, ptr %v0
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ret ptr %v2
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bb2:
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%v3 = load ptr, ptr %v0
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ret ptr %v3
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}
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define ptr @test6(ptr %v0, ptr %v1) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: top:
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: store ptr [[V2]], ptr [[V1:%.*]]
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; CHECK-NEXT: ret ptr [[V2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[V4:%.*]] = load ptr, ptr [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: store ptr [[V4]], ptr [[V1]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret ptr [[V4]]
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;
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top:
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load ptr, ptr %v0, !nonnull !0
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store ptr %v2, ptr %v1
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%v3 = load ptr, ptr %v1
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ret ptr %v3
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bb2:
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%v4 = load ptr, ptr %v0
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store ptr %v4, ptr %v1
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%v5 = load ptr, ptr %v1, !nonnull !0
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ret ptr %v5
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}
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declare void @use2(ptr %a)
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define ptr @test7(ptr %v0) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load ptr, ptr [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: call void @use2(ptr [[V1]])
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; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[V2:%.*]] = load ptr, ptr [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret ptr [[V2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[V3:%.*]] = load ptr, ptr [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret ptr [[V3]]
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;
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top:
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%v1 = load ptr, ptr %v0, !nonnull !0
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call void @use2(ptr %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load ptr, ptr %v0
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ret ptr %v2
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bb2:
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%v3 = load ptr, ptr %v0
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ret ptr %v3
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}
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!0 = !{}
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