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clang-p2996/llvm/test/Transforms/InstCombine/strlen-5.ll
Martin Sebor cc2ce81bd8 [SimplifyLibcalls] Tests for libcall folding of subobjects [NFC] 
Add tests exercising the future enancement of folding library function
calls with arguments involving subobjects such as elements of arrays
or struct members.
2022-05-06 10:43:02 -06:00

269 lines
9.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Verify that strlen calls with elements of constant arrays are folded.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare i64 @strlen(i8*)
@a5_4 = constant [5 x [4 x i8]] [[4 x i8] c"123\00", [4 x i8] c"12\00\00", [4 x i8] c"1\00\00\00", [4 x i8] zeroinitializer, [4 x i8] zeroinitializer]
; Fold strlen(a5_4[0]) to 3.
define i64 @fold_a5_4_i0_to_3() {
; CHECK-LABEL: @fold_a5_4_i0_to_3(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[0][1]) to 2.
define i64 @fold_a5_4_i0_p1_to_2() {
; CHECK-LABEL: @fold_a5_4_i0_p1_to_2(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[0][2]) to 1.
define i64 @fold_a5_4_i0_p2_to_1() {
; CHECK-LABEL: @fold_a5_4_i0_p2_to_1(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[0][3]) to 0.
define i64 @fold_a5_4_i0_p3_to_0() {
; CHECK-LABEL: @fold_a5_4_i0_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 0, i64 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a5_4[1]) to 2.
define i64 @fold_a5_4_i1_to_2() {
; CHECK-LABEL: @fold_a5_4_i1_to_2(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[1][1]) to 1.
define i64 @fold_a5_4_i1_p1_to_1() {
; CHECK-LABEL: @fold_a5_4_i1_p1_to_1(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[1][2]) to 0.
define i64 @fold_a5_4_i1_p2_to_0() {
; CHECK-LABEL: @fold_a5_4_i1_p2_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[1][3]) to 0.
define i64 @fold_a5_4_i1_p3_to_0() {
; CHECK-LABEL: @fold_a5_4_i1_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 1, i64 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a5_4[2]) to 1.
define i64 @fold_a5_4_i2_to_1() {
; CHECK-LABEL: @fold_a5_4_i2_to_1(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[2][1]) to 0.
define i64 @fold_a5_4_i2_p1_to_0() {
; CHECK-LABEL: @fold_a5_4_i2_p1_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[2][2]) to 0.
define i64 @fold_a5_4_i2_p2_to_0() {
; CHECK-LABEL: @fold_a5_4_i2_p2_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[2][3]) to 0.
define i64 @fold_a5_4_i2_p3_to_0() {
; CHECK-LABEL: @fold_a5_4_i2_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 2, i64 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a5_4[3]) to 0
define i64 @fold_a5_4_i3_to_0() {
; CHECK-LABEL: @fold_a5_4_i3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[3][1]) to 0
define i64 @fold_a5_4_i3_p1_to_0() {
; CHECK-LABEL: @fold_a5_4_i3_p1_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[3][2]) to 0
define i64 @fold_a5_4_i3_p2_to_0() {
; CHECK-LABEL: @fold_a5_4_i3_p2_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[3][3]) to 0
define i64 @fold_a5_3_i4_p3_to_0() {
; CHECK-LABEL: @fold_a5_3_i4_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 3, i64 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a5_4[4]) to 0
define i64 @fold_a5_4_i4_to_0() {
; CHECK-LABEL: @fold_a5_4_i4_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[4][1]) to 0
define i64 @fold_a5_4_i4_p1_to_0() {
; CHECK-LABEL: @fold_a5_4_i4_p1_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[4][2]) to 0
define i64 @fold_a5_4_i4_p2_to_0() {
; CHECK-LABEL: @fold_a5_4_i4_p2_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a5_4[4][3]) to 0
define i64 @fold_a5_4_i4_p3_to_0() {
; CHECK-LABEL: @fold_a5_4_i4_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr [5 x [4 x i8]], [5 x [4 x i8]]* @a5_4, i64 0, i64 4, i64 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
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