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[InstCombine] Add tests for PR44423 and PR44425; NFC

This commit is contained in:
Nikita Popov 2020-01-01 20:27:20 +01:00
parent 7f48171d2f
commit 11552433eb
1 changed files with 40 additions and 0 deletions
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40
llvm/test/Transforms/InstCombine/getelementptr.ll
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@ -1168,3 +1168,43 @@ define <2 x i32*> @PR32414(i32** %ptr) {
%tmp1 = getelementptr inbounds i32, i32* %tmp0, <2 x i64> <i64 0, i64 1>
ret <2 x i32*> %tmp1
}
define i32* @test_bitcast_nzgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_bitcast_nzgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr [1 x i32], [1 x i32]* [[BASE:%.*]], i64 0, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = bitcast [1 x i32]* %base to i32*
%ptr = getelementptr inbounds i32, i32* %base2, i64 %idx
ret i32* %ptr
}
define i32* @test_zgep_nzgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_zgep_nzgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr [1 x i32], [1 x i32]* [[BASE:%.*]], i64 0, i64 [[IDX:%.*]]
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = getelementptr [1 x i32], [1 x i32]* %base, i64 0, i64 0
%ptr = getelementptr inbounds i32, i32* %base2, i64 %idx
ret i32* %ptr
}
define i32* @test_nzgep_zgep([1 x i32]* %base, i64 %idx) {
; CHECK-LABEL: @test_nzgep_zgep(
; CHECK-NEXT: [[PTR:%.*]] = getelementptr [1 x i32], [1 x i32]* [[BASE:%.*]], i64 [[IDX:%.*]], i64 0
; CHECK-NEXT: ret i32* [[PTR]]
;
%base2 = getelementptr inbounds [1 x i32], [1 x i32]* %base, i64 %idx
%ptr = getelementptr [1 x i32], [1 x i32]* %base2, i64 0, i64 0
ret i32* %ptr
}
define i32* @test_gep_inbounds_of_gep(i32* %base) {
; CHECK-LABEL: @test_gep_inbounds_of_gep(
; CHECK-NEXT: [[PTR2:%.*]] = getelementptr inbounds i32, i32* [[BASE:%.*]], i64 8
; CHECK-NEXT: ret i32* [[PTR2]]
;
%ptr1 = getelementptr i32, i32* %base, i64 4
%ptr2 = getelementptr inbounds i32, i32* %ptr1, i64 4
ret i32* %ptr2
}