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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -dse -S %s | FileCheck %s
declare void @use_pointer(i32*)
; Out-of-bounds stores can be considered killing any other stores to the same
; object in the same BB, because they are UB and guaranteed to execute. Note
; that cases in which the BB is exited through unwinding are handled separately
; by DSE and the unwinding call will be considered as clobber.
define i32 @test_out_of_bounds_store_local(i1 %c) {
; CHECK-LABEL: @test_out_of_bounds_store_local(
; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 1
; CHECK-NEXT: store i32 20, i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[BC:%.*]] = bitcast [1 x i32]* [[D]] to i32*
; CHECK-NEXT: call void @use_pointer(i32* [[BC]])
; CHECK-NEXT: ret i32 0
;
%d = alloca [1 x i32], align 4
%arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
store i32 10, i32* %arrayidx, align 4
%arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
store i32 20, i32* %arrayidx.1, align 4
%bc = bitcast [1 x i32]* %d to i32*
call void @use_pointer(i32* %bc)
ret i32 0
}
; Similar to @test_out_of_bounds_store_local, but with multiple in-bounds
; stores to a larger object, followed by an out-of-bounds store.
; FIXME: the 2 inbounds stores could be removed by applying the same
; reasoning as for @test_out_of_bounds_store_local.
define i32 @test_out_of_bounds_store_local_larger_object(i1 %c) {
; CHECK-LABEL: @test_out_of_bounds_store_local_larger_object(
; CHECK-NEXT: [[D:%.*]] = alloca [2 x i32], align 4
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[D]], i64 0, i64 0
; CHECK-NEXT: store i32 10, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[D]], i64 0, i64 1
; CHECK-NEXT: store i32 20, i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[D]], i64 0, i64 2
; CHECK-NEXT: store i32 30, i32* [[ARRAYIDX_2]], align 4
; CHECK-NEXT: [[BC:%.*]] = bitcast [2 x i32]* [[D]] to i32*
; CHECK-NEXT: call void @use_pointer(i32* [[BC]])
; CHECK-NEXT: ret i32 0
;
%d = alloca [2 x i32], align 4
%arrayidx = getelementptr inbounds [2 x i32], [2 x i32]* %d, i64 0, i64 0
store i32 10, i32* %arrayidx, align 4
%arrayidx.1 = getelementptr inbounds [2 x i32], [2 x i32]* %d, i64 0, i64 1
store i32 20, i32* %arrayidx.1, align 4
%arrayidx.2 = getelementptr inbounds [2 x i32], [2 x i32]* %d, i64 0, i64 2
store i32 30, i32* %arrayidx.2, align 4
%bc = bitcast [2 x i32]* %d to i32*
call void @use_pointer(i32* %bc)
ret i32 0
}
; Make sure that out-of-bound stores are not considered killing other stores to
; the same underlying object, if they are in different basic blocks. The
; out-of-bounds store may not be executed.
;
; Test case from PR48279. FIXME.
define i32 @test_out_of_bounds_store_nonlocal(i1 %c) {
; CHECK-LABEL: @test_out_of_bounds_store_nonlocal(
; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
; CHECK-NEXT: store i32 10, i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: br i1 [[C:%.*]], label [[FOR_BODY_1:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.1:
; CHECK-NEXT: ret i32 1
; CHECK: for.end:
; CHECK-NEXT: [[BC:%.*]] = bitcast [1 x i32]* [[D]] to i32*
; CHECK-NEXT: call void @use_pointer(i32* [[BC]])
; CHECK-NEXT: ret i32 0
;
%d = alloca [1 x i32], align 4
br label %for.body
for.body: ; preds = %for.cond
%arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
store i32 10, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body
br i1 %c, label %for.body.1, label %for.end
for.body.1: ; preds = %for.inc
%arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
store i32 20, i32* %arrayidx.1, align 4
ret i32 1
for.end: ; preds = %for.inc
%bc = bitcast [1 x i32]* %d to i32*
call void @use_pointer(i32* %bc)
ret i32 0
}
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