Author: Aaron Ballman Date: 2022-06-30T15:46:47-04:00 New Revision: cce06da1ecf789658551ca5f3b255c361f063abf
URL: https://github.com/llvm/llvm-project/commit/cce06da1ecf789658551ca5f3b255c361f063abf DIFF: https://github.com/llvm/llvm-project/commit/cce06da1ecf789658551ca5f3b255c361f063abf.diff LOG: Test and document some C99 DRs This captures the first 15 or so DRs in C99 Added: clang/test/C/drs/dr206.c clang/test/C/drs/dr208.c clang/test/C/drs/dr209.c clang/test/C/drs/dr2xx.c Modified: clang/www/c_dr_status.html Removed: ################################################################################ diff --git a/clang/test/C/drs/dr206.c b/clang/test/C/drs/dr206.c new file mode 100644 index 0000000000000..d5686a43b3304 --- /dev/null +++ b/clang/test/C/drs/dr206.c @@ -0,0 +1,23 @@ +/* RUN: %clang_cc1 -std=c89 -Wno-deprecated-non-prototype -ast-dump -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c99 -Wno-deprecated-non-prototype -ast-dump -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c11 -Wno-deprecated-non-prototype -ast-dump -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c17 -Wno-deprecated-non-prototype -ast-dump -o - %s | FileCheck %s + */ + +/* WG14 DR206: yes + * Default argument conversion of float _Complex + */ +void dr206_unprototyped(); +void dr206(void) { + /* Ensure that _Complex float is not promoted to _Complex double but is + * instead passed directly without a type conversion. + */ + _Complex float f = 1.2f; + dr206_unprototyped(f); + // CHECK: CallExpr 0x{{.*}} <line:16:3, col:23> 'void' + // CHECK-NEXT: ImplicitCastExpr 0x{{.*}} <col:3> 'void (*)()' <FunctionToPointerDecay> + // CHECK-NEXT: DeclRefExpr 0x{{.*}} <col:3> 'void ()' Function 0x{{.*}} 'dr206_unprototyped' 'void ()' + // CHECK-NEXT: ImplicitCastExpr 0x{{.*}} <col:22> '_Complex float' <LValueToRValue> + // CHECK-NEXT: DeclRefExpr 0x{{.*}} <col:22> '_Complex float' lvalue Var 0x{{.*}} 'f' '_Complex float' +} + diff --git a/clang/test/C/drs/dr208.c b/clang/test/C/drs/dr208.c new file mode 100644 index 0000000000000..aac27e7c1ad31 --- /dev/null +++ b/clang/test/C/drs/dr208.c @@ -0,0 +1,24 @@ +/* RUN: %clang_cc1 -std=c99 -verify -emit-llvm -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c11 -verify -emit-llvm -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c17 -verify -emit-llvm -o - %s | FileCheck %s + RUN: %clang_cc1 -std=c2x -verify -emit-llvm -o - %s | FileCheck %s + */ + +/* WG14 DR208: yes + * Ambiguity in initialization + */ +int dr208_init(int); +void dr208(void) { + int a[2] = { + dr208_init(0), /* expected-note {{previous initialization with side effects is here (side effects will not occur at run time)}} */ + dr208_init(1), + [0] = dr208_init(2) /* expected-warning {{initializer overrides prior initialization of this subobject}} */ + }; + + /* CHECK-NOT: call i32 @dr208_init(i32 noundef 0) + CHECK-DAG: call i32 @dr208_init(i32 noundef 1) + CHECK-DAG: call i32 @dr208_init(i32 noundef 2) + CHECK-NOT: call i32 @dr208_init(i32 noundef 0) + */ +} + diff --git a/clang/test/C/drs/dr209.c b/clang/test/C/drs/dr209.c new file mode 100644 index 0000000000000..6cd6093a4b918 --- /dev/null +++ b/clang/test/C/drs/dr209.c @@ -0,0 +1,61 @@ +/* RUN: %clang_cc1 -std=c99 -ffreestanding -triple x86_64-unknown-linux -fsyntax-only -verify -pedantic -Wno-c11-extensions %s + RUN: %clang_cc1 -std=c99 -ffreestanding -triple x86_64-unknown-win32 -fms-compatibility -fsyntax-only -verify -pedantic -Wno-c11-extensions %s + RUN: %clang_cc1 -std=c11 -ffreestanding -fsyntax-only -verify -pedantic %s + RUN: %clang_cc1 -std=c17 -ffreestanding -fsyntax-only -verify -pedantic %s + RUN: %clang_cc1 -std=c2x -ffreestanding -fsyntax-only -verify -pedantic %s + */ + +/* WG14 DR209: partial + * Problem implementing INTN_C macros + */ +#include <stdint.h> + +#if INT8_C(0) != 0 +#error "uh oh" +#elif INT16_C(0) != 0 +#error "uh oh" +#elif INT32_C(0) != 0 +#error "uh oh" +#elif INT64_C(0) != 0LL +#error "uh oh" +#elif UINT8_C(0) != 0U +#error "uh oh" +#elif UINT16_C(0) != 0U +#error "uh oh" +#elif UINT32_C(0) != 0U +#error "uh oh" +#elif UINT64_C(0) != 0ULL +#error "uh oh" +#endif + +void dr209(void) { + (void)_Generic(INT8_C(0), __typeof__(+(int_least8_t){0}) : 1); + (void)_Generic(INT16_C(0), __typeof__(+(int_least16_t){0}) : 1); + (void)_Generic(INT32_C(0), __typeof__(+(int_least32_t){0}) : 1); + (void)_Generic(INT64_C(0), __typeof__(+(int_least64_t){0}) : 1); + (void)_Generic(UINT8_C(0), __typeof__(+(uint_least8_t){0}) : 1); + (void)_Generic(UINT16_C(0), __typeof__(+(uint_least16_t){0}) : 1); + // FIXME: This is not the expected behavior; the type of the expanded value + // in both of these cases should be 'int', + // + // C99 7.18.4p3: The type of the expression shall have the same type as would + // an expression of the corresponding type converted according to the integer + // promotions. + // + // C99 7.18.4.1p1: The macro UINTN_C(value) shall expand to an integer + // constant expression corresponding to the type uint_leastN_t. + // + // C99 7.18.1.2p2: The typedef name uint_leastN_t designates an unsigned + // integer type with a width of at least N, ... + // + // So the value's type is the same underlying type as uint_leastN_t, which is + // unsigned char for uint_least8_t, and unsigned short for uint_least16_t, + // but then the value undergoes integer promotions which would convert both + // of those types to int. + // + // expected-error@-2 {{controlling expression type 'unsigned int' not compatible with any generic association type}} + // expected-error@-2 {{controlling expression type 'unsigned int' not compatible with any generic association type}} + (void)_Generic(UINT32_C(0), __typeof__(+(uint_least32_t){0}) : 1); + (void)_Generic(UINT64_C(0), __typeof__(+(uint_least64_t){0}) : 1); +} + diff --git a/clang/test/C/drs/dr2xx.c b/clang/test/C/drs/dr2xx.c new file mode 100644 index 0000000000000..0fa0f97858197 --- /dev/null +++ b/clang/test/C/drs/dr2xx.c @@ -0,0 +1,82 @@ +/* RUN: %clang_cc1 -std=c89 -fsyntax-only -verify=expected,c89only -pedantic -Wno-c11-extensions %s + RUN: %clang_cc1 -std=c99 -triple x86_64-unknown-linux -fsyntax-only -verify=expected,c99untilc2x -pedantic -Wno-c11-extensions %s + RUN: %clang_cc1 -std=c99 -triple x86_64-unknown-win32 -fms-compatibility -fsyntax-only -verify=expected,c99untilc2x -pedantic -Wno-c11-extensions %s + RUN: %clang_cc1 -std=c11 -fsyntax-only -verify=expected,c99untilc2x -pedantic %s + RUN: %clang_cc1 -std=c17 -fsyntax-only -verify=expected,c99untilc2x -pedantic %s + RUN: %clang_cc1 -std=c2x -fsyntax-only -verify=expected,c2xandup -pedantic %s + */ + +/* The following are DRs which do not require tests to demonstrate + * conformance or nonconformance. + * + * WG14 DR201: yes + * Integer types longer than long + * + * WG14 DR211: yes + * Accuracy of decimal string to/from "binary" (non-decimal) floating-point conversions + * + * WG14 DR215: yes + * Equality operators + */ + + +/* WG14 DR204: yes + * size_t and ptr diff _t as a long long type + */ +void dr204(void) { + __typeof__(sizeof(0)) s; + __typeof__((int *)0 - (int *)0) p; + signed long sl; +#if __LLONG_WIDTH__ > __LONG_WIDTH__ + /* If the implementation supports a standard integer type larger than signed + * long, it's okay for size_t and ptr diff _t to have a greater integer + * conversion rank than signed long. + */ + (void)_Generic(s + sl, __typeof__(s) : 1); + (void)_Generic(p + sl, __typeof__(p) : 1); +#elif __LLONG_WIDTH__ == __LONG_WIDTH__ + /* But if the implementation doesn't support a larger standard integer type + * than signed long, the conversion rank should prefer signed long if the type + * is signed (ptr diff _t) or unsigned long if the type is unsigned (size_t). + */ + (void)_Generic(s + sl, unsigned long : 1); + (void)_Generic(p + sl, signed long : 1); +#else +#error "Something has gone off the rails" +#endif +} + +/* WG14 DR207: partial + * Handling of imaginary types + * + * FIXME: Clang recognizes the _Imaginary keyword but does not support the data + * type. + */ +void dr207(void) { + _Imaginary float f; /* expected-error {{imaginary types are not supported}} + c89only-warning {{'_Imaginary' is a C99 extension}} + */ +} + +/* WG14 DR216: yes + * Source character encodings + */ +void dr216(void) { +#define A(x) _Static_assert((char)x >= 0, "no") + A('A'); A('B'); A('C'); A('D'); A('E'); A('F'); A('G'); A('H'); A('I'); + A('J'); A('K'); A('L'); A('M'); A('N'); A('O'); A('P'); A('Q'); A('R'); + A('S'); A('T'); A('U'); A('V'); A('W'); A('X'); A('Y'); A('Z'); + + A('a'); A('b'); A('c'); A('d'); A('e'); A('f'); A('g'); A('h'); A('i'); + A('j'); A('k'); A('l'); A('m'); A('n'); A('o'); A('p'); A('q'); A('r'); + A('s'); A('t'); A('u'); A('v'); A('w'); A('x'); A('y'); A('z'); + + A('0'); A('1'); A('2'); A('3'); A('4'); + A('5'); A('6'); A('7'); A('8'); A('9'); + + A('!'); A('"'); A('#'); A('%'); A('&'); A('\''); A('('); A(')'); A('*'); + A('+'); A(','); A('-'); A('.'); A('/'); A(':'); A(';'); A('<'); A('='); + A('>'); A('?'); A('['); A('\\'); A(']'); A('^'); A('_'); A('{'); A('|'); + A('}'); A('~'); +#undef A +} diff --git a/clang/www/c_dr_status.html b/clang/www/c_dr_status.html index e6e339d5f18ce..ea604b498a539 100644 --- a/clang/www/c_dr_status.html +++ b/clang/www/c_dr_status.html @@ -1129,7 +1129,7 @@ <h2 id="cdr">C defect report implementation status</h2> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_201.htm";>201</a></td> <td>NAD</td> <td>Integer types longer than long</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="202"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_202.htm";>202</a></td> @@ -1147,7 +1147,7 @@ <h2 id="cdr">C defect report implementation status</h2> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_204.htm";>204</a></td> <td>C99</td> <td>size_t and ptr diff _t as a long long type</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="205"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_205.htm";>205</a></td> @@ -1159,25 +1159,36 @@ <h2 id="cdr">C defect report implementation status</h2> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_206.htm";>206</a></td> <td>NAD</td> <td>Default argument conversion of float _Complex</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="207"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_207.htm";>207</a></td> <td>C99</td> <td>Handling of imaginary types</td> - <td class="unknown" align="center">Unknown</td> + <td class="partial" align="center"> + <details><summary>Partial</summary> + Clang detects use of the _Imaginary keyword but does not otherwise + support the type yet. + </details> + </td> </tr> <tr id="208"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_208.htm";>208</a></td> <td>C99</td> <td>Ambiguity in initialization</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="209"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_209.htm";>209</a></td> <td>C99</td> <td>Problem implementing INTN_C macros</td> - <td class="na" align="center">N/A</td> + <td class="partial" align="center"> + <details><summary>Partial</summary> + Clang provides these definitions in a freestanding compilation, but the + type of the value produced by <code>UINT8_C</code> and <code>UINT16_C</code> + is not the type after integer promotion per C99 7.18.4p3. + </details> + </td> </tr> <tr id="210"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_210.htm";>210</a></td> @@ -1189,7 +1200,7 @@ <h2 id="cdr">C defect report implementation status</h2> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_211.htm";>211</a></td> <td>C99</td> <td>Accuracy of decimal string to/from "binary" (non-decimal) floating-point conversions</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="212"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_212.htm";>212</a></td> @@ -1213,13 +1224,13 @@ <h2 id="cdr">C defect report implementation status</h2> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_215.htm";>215</a></td> <td>C99</td> <td>Equality operators</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="216"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_216.htm";>216</a></td> <td>C99</td> <td>Source character encodings</td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr id="217"> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_217.htm";>217</a></td> _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
