158 lines
6.5 KiB
C
158 lines
6.5 KiB
C
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// RUN: %clang_cc1 -fsanitize=implicit-integer-sign-change -fsanitize-recover=implicit-integer-sign-change -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK
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// Test plan:
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// * Two types - int and char
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// * Two signs - signed and unsigned
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// * Square that - we have input and output types.
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// Thus, there are total of (2*2)^2 == 16 tests.
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// These are all the possible variations/combinations of casts.
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// However, not all of them should result in the check.
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// So here, we *only* check which should and which should not result in checks.
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// CHECK-DAG: @[[LINE_900_SIGN_CHANGE:.*]] = {{.*}}, i32 900, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1000_SIGN_CHANGE:.*]] = {{.*}}, i32 1000, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1100_SIGN_CHANGE:.*]] = {{.*}}, i32 1100, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1200_SIGN_CHANGE:.*]] = {{.*}}, i32 1200, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1300_SIGN_CHANGE:.*]] = {{.*}}, i32 1300, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1400_SIGN_CHANGE:.*]] = {{.*}}, i32 1400, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1500_SIGN_CHANGE:.*]] = {{.*}}, i32 1500, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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// CHECK-DAG: @[[LINE_1600_SIGN_CHANGE:.*]] = {{.*}}, i32 1600, i32 10 }, {{.*}}, {{.*}}, i8 3 }
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//============================================================================//
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// Half of the cases do not need the check. //
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//============================================================================//
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//----------------------------------------------------------------------------//
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// No cast happens at all. No check needed.
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//----------------------------------------------------------------------------//
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// CHECK-LABEL: @convert_unsigned_int_to_unsigned_int
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unsigned int convert_unsigned_int_to_unsigned_int(unsigned int x) {
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#line 100
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return x;
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}
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// CHECK-LABEL: @convert_unsigned_char_to_unsigned_char
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unsigned char convert_unsigned_char_to_unsigned_char(unsigned char x) {
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#line 200
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return x;
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}
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// CHECK-LABEL: @convert_signed_int_to_signed_int
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signed int convert_signed_int_to_signed_int(signed int x) {
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#line 300
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return x;
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}
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// CHECK-LABEL: @convert_signed_char_to_signed_char
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signed char convert_signed_char_to_signed_char(signed char x) {
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#line 400
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return x;
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}
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//----------------------------------------------------------------------------//
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// Both types are unsigned. No check needed.
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//----------------------------------------------------------------------------//
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// CHECK-LABEL: @convert_unsigned_int_to_unsigned_char
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unsigned char convert_unsigned_int_to_unsigned_char(unsigned int x) {
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#line 500
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return x;
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}
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// CHECK-LABEL: @convert_unsigned_char_to_unsigned_int
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unsigned int convert_unsigned_char_to_unsigned_int(unsigned char x) {
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#line 600
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return x;
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}
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//----------------------------------------------------------------------------//
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// Source type was unsigned, destination type is signed, but non-negative.
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// Because zero-extension happens - the sign bit will be 0. No check needed.
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//----------------------------------------------------------------------------//
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// CHECK-LABEL: @convert_unsigned_char_to_signed_int
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signed int convert_unsigned_char_to_signed_int(unsigned char x) {
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#line 700
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return x;
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}
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//----------------------------------------------------------------------------//
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// Both types are signed, and have the same sign, since sign-extension happens,
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// i.e. the sign bit will be propagated. No check needed.
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//----------------------------------------------------------------------------//
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// CHECK-LABEL: @convert_signed_char_to_signed_int
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signed int convert_signed_char_to_signed_int(signed char x) {
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#line 800
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return x;
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}
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//============================================================================//
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// The remaining 8 cases *do* need the check. //
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//============================================================================//
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// These 3 result in simple 'icmp sge i32 %x, 0'
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// CHECK-LABEL: @convert_unsigned_int_to_signed_int
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signed int convert_unsigned_int_to_signed_int(unsigned int x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_900_SIGN_CHANGE]] to i8*)
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#line 900
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return x;
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}
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// CHECK-LABEL: @convert_signed_int_to_unsigned_int
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unsigned int convert_signed_int_to_unsigned_int(signed int x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1000_SIGN_CHANGE]] to i8*)
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#line 1000
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return x;
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}
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// CHECK-LABEL: @convert_signed_int_to_unsigned_char
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unsigned char convert_signed_int_to_unsigned_char(signed int x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1100_SIGN_CHANGE]] to i8*)
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#line 1100
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return x;
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}
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// These 3 result in simple 'icmp sge i8 %x, 0'
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// CHECK-LABEL: @convert_signed_char_to_unsigned_char
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unsigned char convert_signed_char_to_unsigned_char(signed char x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1200_SIGN_CHANGE]] to i8*)
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#line 1200
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return x;
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}
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// CHECK-LABEL: @convert_unsigned_char_to_signed_char
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signed char convert_unsigned_char_to_signed_char(unsigned char x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1300_SIGN_CHANGE]] to i8*)
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#line 1300
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return x;
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}
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// CHECK-LABEL: @convert_signed_char_to_unsigned_int
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unsigned int convert_signed_char_to_unsigned_int(signed char x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1400_SIGN_CHANGE]] to i8*)
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#line 1400
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return x;
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}
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// 'icmp sge i8 (trunc i32 %x), 0'
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// CHECK-LABEL: @convert_unsigned_int_to_signed_char
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signed char convert_unsigned_int_to_signed_char(unsigned int x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1500_SIGN_CHANGE]] to i8*)
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#line 1500
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return x;
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}
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// 'xor i1 (icmp sge i8 (trunc i32 %x), 0), (icmp sge i32 %x, 0)'
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// CHECK-LABEL: @convert_signed_int_to_signed_char
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signed char convert_signed_int_to_signed_char(signed int x) {
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_1600_SIGN_CHANGE]] to i8*)
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#line 1600
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return x;
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}
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