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12ccdd67aaf56bd05ab3375d81c58dfd5a2db02c
clang-p2996/llvm/test/Transforms/InstCombine/strlen-6.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

313 lines
14 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Verify that strlen calls with members of constant structs are folded.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; struct A_a4 { char a[4]; };
%struct.A_a4 = type { [4 x i8] }
; struct A_a4_a5 { char a[4], b[5]; };
%struct.A_a4_a5 = type { [4 x i8], [5 x i8] }
; struct A_a4_i32_a5 { char a[4]; int32_t i; char b[5]; };
%struct.A_a4_i32_a5 = type { [4 x i8], i32, [5 x i8] }
@a_s3 = constant %struct.A_a4 { [4 x i8 ] c"123\00" }
@a_s3_s4 = constant %struct.A_a4_a5 { [4 x i8 ] c"123\00", [5 x i8] c"1234\00" }
@a_s3_i32_s4 = constant %struct.A_a4_i32_a5 { [4 x i8 ] c"123\00", i32 -1, [5 x i8] c"1234\00" }
; Structs with flexible array members.
@ax_s3 = constant { i8, [4 x i8] } { i8 3, [4 x i8] c"123\00" }
@ax_s5 = constant { i16, [6 x i8] } { i16 5, [6 x i8] c"12345\00" }
@ax_s7 = constant { i32, i32, [8 x i8] } { i32 7, i32 0, [8 x i8] c"1234567\00" }
@ax = external global [0 x i64]
declare i64 @strlen(i8*)
; Fold strlen(a_s3.a) to 3.
define i64 @fold_strlen_a_S3_to_3() {
; CHECK-LABEL: @fold_strlen_a_S3_to_3(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4:%.*]], %struct.A_a4* @a_s3, i64 0, i32 0, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4, %struct.A_a4* @a_s3, i32 0, i32 0, i32 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a_s3.a[1]) to 2.
define i64 @fold_strlen_a_S3_p1_to_2() {
; CHECK-LABEL: @fold_strlen_a_S3_p1_to_2(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4:%.*]], %struct.A_a4* @a_s3, i64 0, i32 0, i64 1))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4, %struct.A_a4* @a_s3, i32 0, i32 0, i32 1
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a_s3.a[2]) to 1.
define i64 @fold_strlen_a_S3_p2_to_1() {
; CHECK-LABEL: @fold_strlen_a_S3_p2_to_1(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4:%.*]], %struct.A_a4* @a_s3, i64 0, i32 0, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4, %struct.A_a4* @a_s3, i32 0, i32 0, i32 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a_s3.a[3]) to 0.
define i64 @fold_strlen_a_S3_p3_to_0() {
; CHECK-LABEL: @fold_strlen_a_S3_p3_to_0(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4:%.*]], %struct.A_a4* @a_s3, i64 0, i32 0, i64 3))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4, %struct.A_a4* @a_s3, i32 0, i32 0, i32 3
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a_s3_s4.a) to 3.
define i64 @fold_strlen_a_S3_s4_to_3() {
; CHECK-LABEL: @fold_strlen_a_S3_s4_to_3(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5:%.*]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 0, i64 0))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 0, i32 0
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(&a_s3_s4.a[2]) to 1.
define i64 @fold_strlen_a_S3_p2_s4_to_1() {
; CHECK-LABEL: @fold_strlen_a_S3_p2_s4_to_1(
; CHECK-NEXT: [[LEN:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5:%.*]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 0, i64 2))
; CHECK-NEXT: ret i64 [[LEN]]
;
%ptr = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 0, i32 2
%len = call i64 @strlen(i8* %ptr)
ret i64 %len
}
; Fold strlen(a_s3_s4.b) to 4.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_S4_to_4() {
; CHECK-LABEL: @fold_strlen_a_s3_S4_to_4(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5:%.*]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 1, i64 0))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 1, i64 0))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 0, i32 4
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 1, i32 0
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(&a_s3_s4.b[1]) to 3.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_S4_p1_to_3() {
; CHECK-LABEL: @fold_strlen_a_s3_S4_p1_to_3(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5:%.*]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 1, i64 1))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_A5]], %struct.A_a4_a5* @a_s3_s4, i64 0, i32 1, i64 1))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 0, i32 5
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_a5, %struct.A_a4_a5* @a_s3_s4, i32 0, i32 1, i32 1
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(a_s3_i32_s4.b) to 4.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_i32_S4_to_4() {
; CHECK-LABEL: @fold_strlen_a_s3_i32_S4_to_4(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5:%.*]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 0))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 0))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 0, i32 8
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 2, i32 0
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(&a_s3_i32_s4.b[1]) to 3.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_i32_S4_p1_to_3() {
; CHECK-LABEL: @fold_strlen_a_s3_i32_S4_p1_to_3(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5:%.*]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 1))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 0))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 0, i32 9
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 2, i32 0
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(&a_s3_i32_s4.b[2]) to 2.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_i32_S4_p2_to_2() {
; CHECK-LABEL: @fold_strlen_a_s3_i32_S4_p2_to_2(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5:%.*]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 2))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 2))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 0, i32 10
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 2, i32 2
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(&a_s3_i32_s4.b[3]) to 1.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_i32_S4_p3_to_1() {
; CHECK-LABEL: @fold_strlen_a_s3_i32_S4_p3_to_1(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5:%.*]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 3))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 3))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 0, i32 11
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 2, i32 3
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(&a_s3_i32_s4.b[4]) to 0.
; Exercise both variants of the GEP index.
define void @fold_strlen_a_s3_i32_S4_p4_to_0() {
; CHECK-LABEL: @fold_strlen_a_s3_i32_S4_p4_to_0(
; CHECK-NEXT: [[LEN1:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5:%.*]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 4))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN2:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([[STRUCT_A_A4_I32_A5]], %struct.A_a4_i32_a5* @a_s3_i32_s4, i64 0, i32 2, i64 4))
; CHECK-NEXT: store i64 [[LEN1]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: ret void
;
%p1 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 0, i32 12
%len1 = call i64 @strlen(i8* %p1)
%pax0 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len1, i64* %pax0
%p2 = getelementptr %struct.A_a4_i32_a5, %struct.A_a4_i32_a5* @a_s3_i32_s4, i32 0, i32 2, i32 4
%len2 = call i64 @strlen(i8* %p2)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len1, i64* %pax1
ret void
}
; Fold strlen(ax_sN.a) of an constant initialized flexible array member
; to N for N in { 3, 5, 7 }.
define void @fold_strlen_ax_s() {
; CHECK-LABEL: @fold_strlen_ax_s(
; CHECK-NEXT: [[LEN3:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ({ i8, [4 x i8] }, { i8, [4 x i8] }* @ax_s3, i64 0, i32 1, i64 0))
; CHECK-NEXT: store i64 [[LEN3]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 0), align 4
; CHECK-NEXT: [[LEN5:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ({ i16, [6 x i8] }, { i16, [6 x i8] }* @ax_s5, i64 0, i32 1, i64 0))
; CHECK-NEXT: store i64 [[LEN5]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 1), align 4
; CHECK-NEXT: [[LEN7:%.*]] = call i64 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ({ i32, i32, [8 x i8] }, { i32, i32, [8 x i8] }* @ax_s7, i64 0, i32 2, i64 0))
; CHECK-NEXT: store i64 [[LEN7]], i64* getelementptr inbounds ([0 x i64], [0 x i64]* @ax, i64 0, i64 2), align 4
; CHECK-NEXT: ret void
;
%pax_s3 = getelementptr { i8, [4 x i8] }, { i8, [4 x i8] }* @ax_s3, i64 0, i32 1, i64 0
%len3 = call i64 @strlen(i8* %pax_s3)
%pax1 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 0
store i64 %len3, i64* %pax1
%pax_s5 = getelementptr { i16, [6 x i8] }, { i16, [6 x i8] }* @ax_s5, i64 0, i32 1, i64 0
%len5 = call i64 @strlen(i8* %pax_s5)
%pax2 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 1
store i64 %len5, i64* %pax2
%pax_s7 = getelementptr { i32, i32, [8 x i8] }, { i32, i32, [8 x i8] }* @ax_s7, i64 0, i32 2, i64 0
%len7 = call i64 @strlen(i8* %pax_s7)
%pax3 = getelementptr inbounds [0 x i64], [0 x i64]* @ax, i64 0, i64 2
store i64 %len7, i64* %pax3
ret void
}
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