8e8d2595da
This patch canonicalizes constant expression GEPs to use i8 source element type, aka ptradd. This is the ConstantFolding equivalent of the InstCombine canonicalization introduced in #68882. I believe all our optimizations working on constant expression GEPs (like GlobalOpt etc) have already been switched to work on offsets, so I don't expect any significant fallout from this change. This is part of: https://discourse.llvm.org/t/rfc-replacing-getelementptr-with-ptradd/68699
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=instcombine -S -o - %s | FileCheck %s
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; Tests that we preserve the inrange attribute on indices where possible.
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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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%struct.A = type { ptr }
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@vt = external global [3 x ptr]
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define ptr @f0() {
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; CHECK-LABEL: @f0(
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; CHECK-NEXT: ret ptr getelementptr inbounds inrange(-16, 8) (i8, ptr @vt, i64 16)
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;
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ret ptr getelementptr (ptr, ptr getelementptr inbounds inrange(-8, 16) ([3 x ptr], ptr @vt, i64 0, i64 1), i64 1)
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}
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define ptr @f1() {
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; CHECK-LABEL: @f1(
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; CHECK-NEXT: ret ptr getelementptr inbounds inrange(-8, 0) (i8, ptr @vt, i64 16)
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;
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ret ptr getelementptr (ptr, ptr getelementptr inbounds inrange(0, 8) ([3 x ptr], ptr @vt, i64 0, i64 1), i64 1)
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}
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define ptr @f2() {
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; CHECK-LABEL: @f2(
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; CHECK-NEXT: ret ptr getelementptr inrange(-24, -16) (i8, ptr @vt, i64 32)
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;
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ret ptr getelementptr (ptr, ptr getelementptr inbounds inrange(0, 8) ([3 x ptr], ptr @vt, i64 0, i64 1), i64 3)
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}
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