177 lines
4.2 KiB
LLVM
177 lines
4.2 KiB
LLVM
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; RUN: opt %s -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 i8* @test1(i8** %v0, i8** %v1) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
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; CHECK-NEXT: ret i8* [[V2]]
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;
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top:
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%v2 = load i8*, i8** %v0, !nonnull !0
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store i8* %v2, i8** %v1
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%v3 = load i8*, i8** %v1
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ret i8* %v3
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}
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; FIXME: could propagate nonnull to first load?
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define i8* @test2(i8** %v0, i8** %v1) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
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; CHECK-NEXT: ret i8* [[V2]]
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;
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top:
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%v2 = load i8*, i8** %v0
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store i8* %v2, i8** %v1
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%v3 = load i8*, i8** %v1, !nonnull !0
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ret i8* %v3
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}
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declare void @use1(i8* %a) readonly
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define i8* @test3(i8** %v0) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: call void @use1(i8* [[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 i8* [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret i8* [[V1]]
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;
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top:
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%v1 = load i8*, i8** %v0
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call void @use1(i8* %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load i8*, i8** %v0, !nonnull !0
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ret i8* %v2
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bb2:
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%v3 = load i8*, i8** %v0
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ret i8* %v3
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}
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define i8* @test4(i8** %v0) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: call void @use1(i8* [[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 i8* [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret i8* [[V1]]
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;
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top:
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%v1 = load i8*, i8** %v0
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call void @use1(i8* %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load i8*, i8** %v0
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ret i8* %v2
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bb2:
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%v3 = load i8*, i8** %v0, !nonnull !0
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ret i8* %v3
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}
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define i8* @test5(i8** %v0) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: call void @use1(i8* [[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 i8* [[V1]]
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; CHECK: bb2:
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; CHECK-NEXT: ret i8* [[V1]]
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;
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top:
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%v1 = load i8*, i8** %v0, !nonnull !0
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call void @use1(i8* %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load i8*, i8** %v0
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ret i8* %v2
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bb2:
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%v3 = load i8*, i8** %v0
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ret i8* %v3
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}
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define i8* @test6(i8** %v0, i8** %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 i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
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; CHECK-NEXT: ret i8* [[V2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[V4:%.*]] = load i8*, i8** [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: store i8* [[V4]], i8** [[V1]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret i8* [[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 i8*, i8** %v0, !nonnull !0
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store i8* %v2, i8** %v1
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%v3 = load i8*, i8** %v1
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ret i8* %v3
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bb2:
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%v4 = load i8*, i8** %v0
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store i8* %v4, i8** %v1
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%v5 = load i8*, i8** %v1, !nonnull !0
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ret i8* %v5
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}
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declare void @use2(i8* %a)
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define i8* @test7(i8** %v0) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: top:
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; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
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; CHECK-NEXT: call void @use2(i8* [[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 i8*, i8** [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret i8* [[V2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[V3:%.*]] = load i8*, i8** [[V0]]
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; CHECK-NOT: !nonnull
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; CHECK-NEXT: ret i8* [[V3]]
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;
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top:
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%v1 = load i8*, i8** %v0, !nonnull !0
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call void @use2(i8* %v1)
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br i1 undef, label %bb1, label %bb2
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bb1:
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%v2 = load i8*, i8** %v0
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ret i8* %v2
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bb2:
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%v3 = load i8*, i8** %v0
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ret i8* %v3
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}
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!0 = !{}
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