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llvm-project/llvm/test/Transforms/ConstraintElimination/geps-inbounds-precondition-...

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -constraint-elimination -S %s | FileCheck %s
; Tests for using inbounds information from GEPs where the GEP only causes UB in the use blocks.
declare void @noundef(i32* noundef) willreturn nounwind
declare void @noundef2(i32* noundef)
declare void @use(i1)
; %start + %n.ext is guaranteed to not overflow (due to inbounds).
; %start + %idx.ext does not overflow if %idx.ext <= %n.ext.
define i1 @inbounds_poison_is_ub_in_use_block_1(i32* %src, i32 %n, i32 %idx) {
; CHECK-LABEL: @inbounds_poison_is_ub_in_use_block_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
call void @noundef(i32* %upper)
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.1
else:
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
define i1 @inbounds_poison_is_ub_in_use_block_2(i32* %src, i32 %n, i32 %idx, i1 %c) {
; CHECK-LABEL: @inbounds_poison_is_ub_in_use_block_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
call void @noundef(i32* %upper)
ret i1 %cmp.upper.1
else:
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
declare void @llvm.assume(i1)
; %start + %n.ext is guaranteed to not overflow (due to inbounds).
; %start + %idx.ext does not overflow if %idx.ext <= %n.ext.
define i1 @inbounds_poison_is_ub_in_use_block_by_assume(i32* %src, i32 %n, i32 %idx) {
; CHECK-LABEL: @inbounds_poison_is_ub_in_use_block_by_assume(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[CMP_NE:%.*]] = icmp ule i32* null, [[UPPER]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP_NE]])
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
%cmp.ne = icmp ule i32* null, %upper
call void @llvm.assume(i1 %cmp.ne)
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.1
else:
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
; %start + %n.ext is guaranteed to not overflow (due to inbounds).
; %start + %idx.ext does not overflow if %idx.ext <= %n.ext.
define i1 @inbounds_poison_is_ub_in_in_multiple_use_blocks_1(i32* %src, i32 %n, i32 %idx, i1 %c) {
; CHECK-LABEL: @inbounds_poison_is_ub_in_in_multiple_use_blocks_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[CHECK_BB:%.*]], label [[EXIT:%.*]]
; CHECK: check.bb:
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
; CHECK: exit:
; CHECK-NEXT: ret i1 false
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
br i1 %c, label %check.bb, label %exit
check.bb:
call void @noundef(i32* %upper)
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
call void @noundef(i32* %upper)
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.1
else:
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
exit:
ret i1 false
}
define i1 @may_exit_before_ub_is_caused(i32* %src, i32 %n, i32 %idx) {
; CHECK-LABEL: @may_exit_before_ub_is_caused(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: call void @use(i1 [[CMP_UPPER_1]])
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
call void @use(i1 %cmp.upper.1);
call void @noundef(i32* %upper)
ret i1 %cmp.upper.1
else:
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
define i1 @only_UB_in_false_block(i32* %src, i32 %n, i32 %idx) {
; CHECK-LABEL: @only_UB_in_false_block(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: call void @noundef(i32* [[UPPER]])
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.1
else:
call void @noundef(i32* %upper)
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
define i1 @only_ub_by_assume_in_false_block(i32* %src, i32 %n, i32 %idx) {
; CHECK-LABEL: @only_ub_by_assume_in_false_block(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, i32* [[SRC:%.*]], i64 [[N_EXT]]
; CHECK-NEXT: [[CMP_IDX:%.*]] = icmp ult i32 [[IDX:%.*]], [[N]]
; CHECK-NEXT: [[IDX_EXT:%.*]] = zext i32 [[IDX]] to i64
; CHECK-NEXT: [[SRC_IDX:%.*]] = getelementptr i32, i32* [[SRC]], i64 [[IDX_EXT]]
; CHECK-NEXT: br i1 [[CMP_IDX]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[CMP_UPPER_1:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_1]]
; CHECK: else:
; CHECK-NEXT: [[CMP_NE:%.*]] = icmp ule i32* null, [[UPPER]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP_NE]])
; CHECK-NEXT: [[CMP_UPPER_2:%.*]] = icmp ule i32* [[SRC_IDX]], [[UPPER]]
; CHECK-NEXT: ret i1 [[CMP_UPPER_2]]
;
entry:
%n.ext = zext i32 %n to i64
%upper = getelementptr inbounds i32, i32* %src, i64 %n.ext
%cmp.idx = icmp ult i32 %idx, %n
%idx.ext = zext i32 %idx to i64
%src.idx = getelementptr i32, i32* %src, i64 %idx.ext
br i1 %cmp.idx, label %then, label %else
then:
%cmp.upper.1 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.1
else:
%cmp.ne = icmp ule i32* null, %upper
call void @llvm.assume(i1 %cmp.ne)
%cmp.upper.2 = icmp ule i32* %src.idx, %upper
ret i1 %cmp.upper.2
}
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