6545f29f64
Update accumulateConstantOffset and collectOffset to implicitly truncate struct field offsets. This fixes crashes in the new tests, where the field offset does not fit in the index width. PR: https://github.com/llvm/llvm-project/pull/213436
28 lines
1 KiB
LLVM
28 lines
1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -passes=instcombine -S %s | FileCheck %s
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target datalayout = "e-m:e-p:16:16"
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%s = type { [65536 x i8], i8 }
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; Offset of the struct's second field does not fit into a 16 bit pointer.
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define ptr @gep_of_gep_struct_offset_exceeds_index_width(ptr %p, i16 %i) {
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; CHECK-LABEL: define ptr @gep_of_gep_struct_offset_exceeds_index_width(
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; CHECK-SAME: ptr [[P:%.*]], i16 [[I:%.*]]) {
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; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i8, ptr [[P]], i16 [[I]]
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; CHECK-NEXT: ret ptr [[B]]
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;
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%a = getelementptr inbounds %s, ptr %p, i16 0, i32 1
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%b = getelementptr inbounds i8, ptr %a, i16 %i
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ret ptr %b
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}
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define ptr @gep_struct_offset_exceeds_index_width_multiple(ptr %p) {
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; CHECK-LABEL: define ptr @gep_struct_offset_exceeds_index_width_multiple(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: ret ptr [[P]]
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;
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%a = getelementptr inbounds %s, ptr %p, i16 0, i32 1
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%b = getelementptr inbounds %s, ptr %a, i16 0, i32 1
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ret ptr %b
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}
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