10f315dc9c
Infer nuw from nusw and nneg. This is the constant expression variant of https://github.com/llvm/llvm-project/pull/111144. Proof: https://alive2.llvm.org/ce/z/ihztLy
27 lines
1014 B
LLVM
27 lines
1014 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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@g = global [16 x i16] zeroinitializer
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define ptr @gep_constexpr_gv_1() {
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; CHECK-LABEL: @gep_constexpr_gv_1(
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; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @g, i64 20)
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;
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ret ptr getelementptr([16 x i16], ptr @g, i64 0, i64 10)
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}
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define ptr @gep_constexpr_gv_2() {
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; CHECK-LABEL: @gep_constexpr_gv_2(
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; CHECK-NEXT: ret ptr getelementptr inbounds nuw (i8, ptr @g, i64 24)
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;
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ret ptr getelementptr(i32, ptr getelementptr([16 x i16], ptr @g, i64 0, i64 10), i64 1)
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}
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; Silly expression to get an inttoptr that does not combine with the GEP.
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define ptr @gep_constexpr_inttoptr() {
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; CHECK-LABEL: @gep_constexpr_inttoptr(
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; CHECK-NEXT: ret ptr getelementptr (i8, ptr inttoptr (i64 mul (i64 ptrtoint (ptr @g to i64), i64 2) to ptr), i64 20)
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;
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ret ptr getelementptr([16 x i16], ptr inttoptr (i64 mul (i64 ptrtoint (ptr @g to i64), i64 2) to ptr), i64 0, i64 10)
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}
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