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e00f20b94a
When combining an integer load with !range metadata that does not include 0 to a pointer load, make sure emit !nonnull metadata on the newly-created pointer load. This prevents the !nonnull metadata from being dropped during a ptrtoint/inttoptr pair. This fixes PR30597. Patch by Ariel Ben-Yehuda! Differential Revision: https://reviews.llvm.org/D25215 llvm-svn: 283836
33 lines
946 B
LLVM
33 lines
946 B
LLVM
; RUN: opt < %s -instcombine -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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; Function Attrs: readonly uwtable
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define i1 @dot_ref_s(i32** noalias nocapture readonly dereferenceable(8)) {
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entry-block:
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%loadedptr = load i32*, i32** %0, align 8, !nonnull !0
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%ptrtoint = ptrtoint i32* %loadedptr to i64
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%inttoptr = inttoptr i64 %ptrtoint to i32*
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%switchtmp = icmp eq i32* %inttoptr, null
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ret i1 %switchtmp
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; CHECK-LABEL: @dot_ref_s
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; CHECK-NEXT: entry-block:
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; CHECK-NEXT: ret i1 false
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}
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; Function Attrs: readonly uwtable
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define i64* @function(i64* noalias nocapture readonly dereferenceable(8)) {
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entry-block:
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%loaded = load i64, i64* %0, align 8, !range !1
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%inttoptr = inttoptr i64 %loaded to i64*
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ret i64* %inttoptr
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; CHECK-LABEL: @function
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; CHECK: %{{.+}} = load i64*, i64** %{{.+}}, align 8, !nonnull
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}
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!0 = !{}
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!1 = !{i64 1, i64 140737488355327}
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