derek.holloway
7502bf64a4
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33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
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: [[MUL:%.*]] = shl i64 ptrtoint (ptr @g to i64), 1
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; CHECK-NEXT: [[INTTOPTR:%.*]] = inttoptr i64 [[MUL]] to ptr
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr [[INTTOPTR]], i64 20
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; CHECK-NEXT: ret ptr [[GEP]]
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;
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%mul = mul i64 ptrtoint (ptr @g to i64), 2
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%inttoptr = inttoptr i64 %mul to ptr
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%gep = getelementptr [16 x i16], ptr %inttoptr, i64 0, i64 10
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ret ptr %gep
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}
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