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[InstCombine] Add tests for GEP of GEP with opaque pointers (NFC) 

Test cases with element type mismatch, some of which can still
be combined.
This commit is contained in:
Nikita Popov 2022-04-26 17:04:25 +02:00
parent 8631c11590
commit f9d5657217
1 changed files with 101 additions and 2 deletions
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103
llvm/test/Transforms/InstCombine/opaque-ptr.ll
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@ -179,8 +179,8 @@ define ptr @geps_combinable(ptr %a) {
ret ptr %a3
}
define ptr @geps_not_combinable(ptr %a) {
; CHECK-LABEL: @geps_not_combinable(
define ptr @geps_combinable_different_elem_type1(ptr %a) {
; CHECK-LABEL: @geps_combinable_different_elem_type1(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr { i32, i32 }, ptr [[A2]], i64 0, i32 1
; CHECK-NEXT: ret ptr [[A3]]
@ -190,6 +190,105 @@ define ptr @geps_not_combinable(ptr %a) {
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type2(ptr %a) {
; CHECK-LABEL: @geps_combinable_different_elem_type2(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i32 0, i32 1
%a3 = getelementptr i8, ptr %a2, i64 4
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type3(ptr %a) {
; CHECK-LABEL: @geps_combinable_different_elem_type3(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 8
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i32 0, i32 1
%a3 = getelementptr i8, ptr %a2, i64 8
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type4(ptr %a) {
; CHECK-LABEL: @geps_combinable_different_elem_type4(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 10
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i32 0, i32 1
%a3 = getelementptr i8, ptr %a2, i64 10
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type5(ptr %a) {
; CHECK-LABEL: @geps_combinable_different_elem_type5(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 -4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i32 0, i32 1
%a3 = getelementptr i8, ptr %a2, i64 -4
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type6(ptr %a, i64 %idx) {
; CHECK-LABEL: @geps_combinable_different_elem_type6(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 [[IDX:%.*]]
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i64 %idx
%a3 = getelementptr i8, ptr %a2, i64 4
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type7(ptr %a, i64 %idx) {
; CHECK-LABEL: @geps_combinable_different_elem_type7(
; CHECK-NEXT: [[A2:%.*]] = getelementptr { i32, i32 }, ptr [[A:%.*]], i64 [[IDX:%.*]], i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[A2]], i64 4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr { i32, i32 }, ptr %a, i64 %idx, i32 1
%a3 = getelementptr i8, ptr %a2, i64 4
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type8(ptr %a, i64 %idx) {
; CHECK-LABEL: @geps_combinable_different_elem_type8(
; CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds { { i32, i32 } }, ptr [[A:%.*]], i64 [[IDX:%.*]], i32 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr inbounds i8, ptr [[A2]], i64 4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr inbounds { { i32, i32 } }, ptr %a, i64 %idx, i32 0, i32 1
%a3 = getelementptr inbounds i8, ptr %a2, i32 4
ret ptr %a3
}
define ptr @geps_combinable_different_elem_type9(ptr %a, i64 %idx) {
; CHECK-LABEL: @geps_combinable_different_elem_type9(
; CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds { { i32, i32 } }, ptr [[A:%.*]], i64 [[IDX:%.*]], i32 0, i32 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr inbounds i8, ptr [[A2]], i64 -4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr inbounds { { i32, i32 } }, ptr %a, i64 %idx, i32 0, i32 1
%a3 = getelementptr inbounds i8, ptr %a2, i32 -4
ret ptr %a3
}
define ptr @geps_combinable_scalable(ptr %a, i64 %idx) {
; CHECK-LABEL: @geps_combinable_scalable(
; CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds <vscale x 2 x i32>, ptr [[A:%.*]], i64 1
; CHECK-NEXT: [[A3:%.*]] = getelementptr inbounds i8, ptr [[A2]], i64 4
; CHECK-NEXT: ret ptr [[A3]]
;
%a2 = getelementptr inbounds <vscale x 2 x i32>, ptr %a, i64 1
%a3 = getelementptr inbounds i8, ptr %a2, i32 4
ret ptr %a3
}
define i1 @compare_geps_same_indices(ptr %a, ptr %b, i64 %idx) {
; CHECK-LABEL: @compare_geps_same_indices(
; CHECK-NEXT: [[C:%.*]] = icmp eq ptr [[A:%.*]], [[B:%.*]]