sdardis updated this revision to Diff 78531.
sdardis marked 4 inline comments as done.
sdardis added a comment.
Addressed review comments.
https://reviews.llvm.org/D25866
Files:
include/clang/Basic/DiagnosticSemaKinds.td
lib/Sema/SemaExpr.cpp
test/Sema/vector-cast.c
test/Sema/vector-gcc-compat.c
test/Sema/zvector.c
test/SemaCXX/vector-no-lax.cpp
Index: test/SemaCXX/vector-no-lax.cpp
===================================================================
--- test/SemaCXX/vector-no-lax.cpp
+++ test/SemaCXX/vector-no-lax.cpp
@@ -4,6 +4,6 @@
vSInt32 foo (vUInt32 a) {
vSInt32 b = { 0, 0, 0, 0 };
- b += a; // expected-error{{cannot convert between vector values}}
+ b += a; // expected-error{{cannot convert between vector type 'vUInt32' (vector of 4 'unsigned int' values) and vector type 'vSInt32' (vector of 4 'int' values) as implicit conversion would cause truncation}}
return b;
}
Index: test/Sema/zvector.c
===================================================================
--- test/Sema/zvector.c
+++ test/Sema/zvector.c
@@ -326,14 +326,14 @@
bc = bc + sc2; // expected-error {{incompatible type}}
bc = sc + bc2; // expected-error {{incompatible type}}
- sc = sc + sc_scalar; // expected-error {{cannot convert}}
- sc = sc + uc_scalar; // expected-error {{cannot convert}}
- sc = sc_scalar + sc; // expected-error {{cannot convert}}
- sc = uc_scalar + sc; // expected-error {{cannot convert}}
- uc = uc + sc_scalar; // expected-error {{cannot convert}}
- uc = uc + uc_scalar; // expected-error {{cannot convert}}
- uc = sc_scalar + uc; // expected-error {{cannot convert}}
- uc = uc_scalar + uc; // expected-error {{cannot convert}}
+ sc = sc + sc_scalar;
+ sc = sc + uc_scalar; // expected-error {{cannot convert between scalar type 'unsigned char' and vector type '__vector signed char' (vector of 16 'signed char' values) as implicit conversion would cause truncation}}
+ sc = sc_scalar + sc;
+ sc = uc_scalar + sc; // expected-error {{cannot convert between scalar type 'unsigned char' and vector type '__vector signed char' (vector of 16 'signed char' values) as implicit conversion would cause truncation}}
+ uc = uc + sc_scalar; // expected-error {{implicit conversion changes signedness: 'signed char' to '__vector unsigned char' (vector of 16 'unsigned char' values)}}
+ uc = uc + uc_scalar;
+ uc = sc_scalar + uc; // expected-error {{implicit conversion changes signedness: 'signed char' to '__vector unsigned char' (vector of 16 'unsigned char' values)}}
+ uc = uc_scalar + uc;
ss = ss + ss2;
us = us + us2;
@@ -368,10 +368,10 @@
sc += sl2; // expected-error {{cannot convert}}
sc += fd2; // expected-error {{cannot convert}}
- sc += sc_scalar; // expected-error {{cannot convert}}
- sc += uc_scalar; // expected-error {{cannot convert}}
- uc += sc_scalar; // expected-error {{cannot convert}}
- uc += uc_scalar; // expected-error {{cannot convert}}
+ sc += sc_scalar;
+ sc += uc_scalar; // expected-error {{cannot convert between scalar type 'unsigned char' and vector type '__vector signed char' (vector of 16 'signed char' values) as implicit conversion would cause truncation}}
+ uc += sc_scalar; // expected-error {{implicit conversion changes signedness: 'signed char' to '__vector unsigned char' (vector of 16 'unsigned char' values)}}
+ uc += uc_scalar;
ss += ss2;
us += us2;
Index: test/Sema/vector-gcc-compat.c
===================================================================
--- /dev/null
+++ test/Sema/vector-gcc-compat.c
@@ -0,0 +1,304 @@
+// RUN: %clang_cc1 %s -verify -fsyntax-only -Weverything
+typedef long long v2i64 __attribute__((vector_size(16)));
+typedef int v2i32 __attribute__((vector_size(8)));
+typedef short v2i16 __attribute__((vector_size(4)));
+typedef char v2i8 __attribute__((vector_size(2)));
+
+typedef unsigned long long v2u64 __attribute__((vector_size(16)));
+typedef unsigned int v2u32 __attribute__((vector_size(8)));
+typedef unsigned short v2u16 __attribute__((vector_size(4)));
+typedef unsigned char v2u8 __attribute__((vector_size(2)));
+
+typedef float v4f32 __attribute__((vector_size(16)));
+typedef double v4f64 __attribute__((vector_size(32)));
+
+void arithmeticTest(void);
+void logicTest(void);
+void comparisonTest(void);
+void floatTestSignedType(char a, short b, int c, long long d);
+void floatTestUnsignedType(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d);
+void floatTestConstant(void);
+void intTestType(char a, short b, int c, long long d);
+void intTestTypeUnsigned(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d);
+void uintTestType(char a, short b, int c, long long d);
+void uintTestTypeUnsigned(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d);
+void uintTestConstant(v2u64 v2u64_a, v2u32 v2u32_a, v2u16 v2u16_a, v2u8 v2u8_a);
+void intTestConstant(v2i64 v2i64_a, v2i32 v2i32_a, v2i16 v2i16_a, v2i8 v2i8_a);
+
+void arithmeticTest(void) {
+ v2i64 v2i64_a = (v2i64){0, 1};
+ v2i64 v2i64_r;
+
+ v2i64_r = v2i64_a + 1;
+ v2i64_r = v2i64_a - 1;
+ v2i64_r = v2i64_a * 1;
+ v2i64_r = v2i64_a / 1;
+ v2i64_r = v2i64_a % 1;
+
+ v2i64_r = 1 + v2i64_a;
+ v2i64_r = 1 - v2i64_a;
+ v2i64_r = 1 * v2i64_a;
+ v2i64_r = 1 / v2i64_a;
+ v2i64_r = 1 % v2i64_a;
+
+ v2i64_a += 1;
+ v2i64_a -= 1;
+ v2i64_a *= 1;
+ v2i64_a /= 1;
+ v2i64_a %= 1;
+}
+
+void comparisonTest(void) {
+ v2i64 v2i64_a = (v2i64){0, 1};
+ v2i64 v2i64_r;
+
+ // FIXME: -Wall is showing that the type is somehow being converted to
+ // "long __attribute__((ext_vector_type(2)))" when the types should
+ // match.
+ v2i64_r = v2i64_a == 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a != 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a < 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a > 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a <= 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a >= 1; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+
+ v2i64_r = 1 == v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = 1 != v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = 1 < v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = 1 > v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = 1 <= v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = 1 >= v2i64_a; // expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+}
+
+void logicTest(void) {
+ v2i64 v2i64_a = (v2i64){0, 1};
+ v2i64 v2i64_r;
+
+ v2i64_r = v2i64_a & 1;
+ v2i64_r = v2i64_a | 1;
+ v2i64_r = v2i64_a ^ 1;
+
+ v2i64_r = 1 & v2i64_a;
+ v2i64_r = 1 | v2i64_a;
+ v2i64_r = 1 ^ v2i64_a;
+
+ v2i64_a &= 1;
+ v2i64_a |= 1;
+ v2i64_a ^= 1;
+
+ // FIXME: -Wall is showing that the type is somehow being converted to
+ // "long __attribute__((ext_vector_type(2)))" when the types should
+ // match.
+ v2i64_r = v2i64_a && 1; // expected-warning {{implicit conversion turns vector to scalar: 'v2i64' (vector of 2 'long long' values) to '_Bool'}} expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+ v2i64_r = v2i64_a || 1; // expected-warning {{implicit conversion turns vector to scalar: 'v2i64' (vector of 2 'long long' values) to '_Bool'}} expected-warning {{incompatible vector types assigning to 'v2i64' (vector of 2 'long long' values) from 'long __attribute__((ext_vector_type(2)))' (vector of 2 'long' values)}}
+
+ v2i64_r = v2i64_a << 1;
+ v2i64_r = v2i64_a >> 1;
+
+ v2i64_r = 1 << v2i64_a;
+ v2i64_r = 1 >> v2i64_a;
+
+ v2i64_a <<= 1;
+ v2i64_a >>= 1;
+}
+
+// For operations with floating point types, we check that interger constants
+// can be respresented, or failing that checking based on the integer types.
+void floatTestConstant(void) {
+ // Test that constants added to floats must be expressible as floating point
+ // numbers.
+ v4f32 v4f32_a = {0.4f, 0.4f, 0.4f, 0.4f};
+ v4f32_a = v4f32_a + 1;
+ v4f32_a = v4f32_a + 0xFFFFFF;
+ v4f32_a = v4f32_a + (-1567563LL);
+ v4f32_a = v4f32_a + (16777208);
+ v4f32_a = v4f32_a + (16777219); // expected-error {{cannot convert between scalar type 'int' and vector type 'v4f32' (vector of 4 'float' values) as implicit conversion would cause truncation}}
+}
+
+void floatTestUnsignedType(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d) {
+
+ v4f32 v4f32_a = {0.4f, 0.4f, 0.4f, 0.4f};
+ v4f64 v4f64_b = {0.4, 0.4, 0.4, 0.4};
+
+ v4f32_a = v4f32_a + a;
+ v4f32_a = v4f32_a + b;
+ v4f32_a = v4f32_a + c; // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'v4f32' (vector of 4 'float' values) as implicit conversion would cause truncation}}
+ v4f32_a = v4f32_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v4f32' (vector of 4 'float' values) as implicit conversion would cause truncation}}
+
+ v4f64_b = v4f64_b + a;
+ v4f64_b = v4f64_b + b;
+ v4f64_b = v4f64_b + c;
+ v4f64_b = v4f64_b + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v4f64' (vector of 4 'double' values) as implicit conversion would cause truncation}}
+}
+
+void floatTestSignedType(char a, short b, int c, long long d) {
+
+ v4f32 v4f32_a = {0.4f, 0.4f, 0.4f, 0.4f};
+ v4f64 v4f64_b = {0.4, 0.4, 0.4, 0.4};
+
+ v4f32_a = v4f32_a + a;
+ v4f32_a = v4f32_a + b;
+ v4f32_a = v4f32_a + c; // expected-error {{cannot convert between scalar type 'int' and vector type 'v4f32' (vector of 4 'float' values) as implicit conversion would cause truncation}}
+ v4f32_a = v4f32_a + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v4f32' (vector of 4 'float' values) as implicit conversion would cause truncation}}
+
+ v4f64_b = v4f64_b + a;
+ v4f64_b = v4f64_b + b;
+ v4f64_b = v4f64_b + c;
+ v4f64_b = v4f64_b + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v4f64' (vector of 4 'double' values) as implicit conversion would cause truncation}}
+}
+
+void intTestType(char a, short b, int c, long long d) {
+
+ v2i64 v2i64_a = {1, 2};
+ v2i32 v2i32_a = {1, 2};
+ v2i16 v2i16_a = {1, 2};
+ v2i8 v2i8_a = {1, 2};
+
+ v2i64_a = v2i64_a + d;
+ v2i64_a = v2i64_a + c;
+ v2i64_a = v2i64_a + b;
+ v2i64_a = v2i64_a + a;
+
+ v2i32_a = v2i32_a + d; // expected-warning {{implicit conversion loses integer precision: 'long long' to 'v2i32' (vector of 2 'int' values)}}
+ v2i32_a = v2i32_a + c;
+ v2i32_a = v2i32_a + b;
+ v2i32_a = v2i32_a + a;
+
+ v2i16_a = v2i16_a + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v2i16' (vector of 2 'short' values) as implicit conversion would cause truncation}}
+ v2i16_a = v2i16_a + c; // expected-warning {{implicit conversion loses integer precision: 'int' to 'v2i16' (vector of 2 'short' values)}}
+ v2i16_a = v2i16_a + b;
+ v2i16_a = v2i16_a + a;
+
+ v2i8_a = v2i8_a + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+ v2i8_a = v2i8_a + c; // expected-error {{cannot convert between scalar type 'int' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+ v2i8_a = v2i8_a + b; // expected-warning {{implicit conversion loses integer precision: 'short' to 'v2i8' (vector of 2 'char' values)}}
+ v2i8_a = v2i8_a + a;
+}
+
+void intTestTypeUnsigned(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d) {
+
+ v2i64 v2i64_a = {1, 2};
+ v2i32 v2i32_a = {1, 2};
+ v2i16 v2i16_a = {1, 2};
+ v2i8 v2i8_a = {1, 2};
+
+ v2i64_a = v2i64_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v2i64' (vector of 2 'long long' values) as implicit conversion would cause truncation}}
+
+ v2i64_a = v2i64_a + c;
+ v2i64_a = v2i64_a + b;
+ v2i64_a = v2i64_a + a;
+
+ v2i32_a = v2i32_a + d; // expected-warning {{implicit conversion loses integer precision: 'unsigned long long' to 'v2i32' (vector of 2 'int' values)}}
+ v2i32_a = v2i32_a + c; // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'v2i32' (vector of 2 'int' values) as implicit conversion would cause truncation}}
+ v2i32_a = v2i32_a + b;
+ v2i32_a = v2i32_a + a;
+
+ v2i16_a = v2i16_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v2i16' (vector of 2 'short' values) as implicit conversion would cause truncation}}
+ v2i16_a = v2i16_a + c; // expected-warning {{implicit conversion loses integer precision: 'unsigned int' to 'v2i16' (vector of 2 'short' values)}}
+ v2i16_a = v2i16_a + b; // expected-error {{cannot convert between scalar type 'unsigned short' and vector type 'v2i16' (vector of 2 'short' values) as implicit conversion would cause truncation}}
+ v2i16_a = v2i16_a + a;
+
+ v2i8_a = v2i8_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+ v2i8_a = v2i8_a + c; // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+ v2i8_a = v2i8_a + b; // expected-warning {{implicit conversion loses integer precision: 'unsigned short' to 'v2i8' (vector of 2 'char' values)}}
+ v2i8_a = v2i8_a + a; // expected-error {{cannot convert between scalar type 'unsigned char' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+}
+
+void uintTestType(char a, short b, int c, long long d) {
+
+ v2u64 v2u64_a = {1, 2};
+ v2u32 v2u32_a = {1, 2};
+ v2u16 v2u16_a = {1, 2};
+ v2u8 v2u8_a = {1, 2};
+
+ v2u64_a = v2u64_a + d; // expected-warning {{implicit conversion changes signedness: 'long long' to 'v2u64' (vector of 2 'unsigned long long' values)}}
+ v2u64_a = v2u64_a + c; // expected-warning {{implicit conversion changes signedness: 'int' to 'v2u64' (vector of 2 'unsigned long long' values)}}
+ v2u64_a = v2u64_a + b; // expected-warning {{implicit conversion changes signedness: 'short' to 'v2u64' (vector of 2 'unsigned long long' values)}}
+ v2u64_a = v2u64_a + a; // expected-warning {{implicit conversion changes signedness: 'char' to 'v2u64' (vector of 2 'unsigned long long' values)}}
+
+ v2u32_a = v2u32_a + d; // expected-warning {{implicit conversion loses integer precision: 'long long' to 'v2u32' (vector of 2 'unsigned int' values)}}
+ v2u32_a = v2u32_a + c; // expected-warning {{implicit conversion changes signedness: 'int' to 'v2u32' (vector of 2 'unsigned int' values)}}
+ v2u32_a = v2u32_a + b; // expected-warning {{implicit conversion changes signedness: 'short' to 'v2u32' (vector of 2 'unsigned int' values)}}
+ v2u32_a = v2u32_a + a; // expected-warning {{implicit conversion changes signedness: 'char' to 'v2u32' (vector of 2 'unsigned int' values)}}
+
+ v2u16_a = v2u16_a + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v2u16' (vector of 2 'unsigned short' values) as implicit conversion would cause truncation}}
+ v2u16_a = v2u16_a + c; // expected-warning {{implicit conversion loses integer precision: 'int' to 'v2u16' (vector of 2 'unsigned short' values)}}
+ v2u16_a = v2u16_a + b; // expected-warning {{implicit conversion changes signedness: 'short' to 'v2u16' (vector of 2 'unsigned short' values)}}
+ v2u16_a = v2u16_a + a; // expected-warning {{implicit conversion changes signedness: 'char' to 'v2u16' (vector of 2 'unsigned short' values)}}
+
+ v2u8_a = v2u8_a + d; // expected-error {{cannot convert between scalar type 'long long' and vector type 'v2u8' (vector of 2 'unsigned char' values) as implicit conversion would cause truncation}}
+ v2u8_a = v2u8_a + c; // expected-error {{cannot convert between scalar type 'int' and vector type 'v2u8' (vector of 2 'unsigned char' values) as implicit conversion would cause truncation}}
+ v2u8_a = v2u8_a + b; // expected-warning {{implicit conversion loses integer precision: 'short' to 'v2u8' (vector of 2 'unsigned char' values)}}
+ v2u8_a = v2u8_a + a; // expected-warning {{implicit conversion changes signedness: 'char' to 'v2u8' (vector of 2 'unsigned char' values)}}
+}
+
+void uintTestTypeUnsigned(unsigned char a, unsigned short b, unsigned int c,
+ unsigned long long d) {
+
+ v2u64 v2u64_a = {1, 2};
+ v2u32 v2u32_a = {1, 2};
+ v2u16 v2u16_a = {1, 2};
+ v2u8 v2u8_a = {1, 2};
+
+ v2u64_a = v2u64_a + d;
+ v2u64_a = v2u64_a + c;
+ v2u64_a = v2u64_a + b;
+ v2u64_a = v2u64_a + a;
+
+ v2u32_a = v2u32_a + d; // expected-warning {{implicit conversion loses integer precision: 'unsigned long long' to 'v2u32' (vector of 2 'unsigned int' values)}}
+ v2u32_a = v2u32_a + c;
+ v2u32_a = v2u32_a + b;
+ v2u32_a = v2u32_a + a;
+
+ v2u16_a = v2u16_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v2u16' (vector of 2 'unsigned short' values) as implicit conversion would cause truncation}}
+ v2u16_a = v2u16_a + c; // expected-warning {{implicit conversion loses integer precision: 'unsigned int' to 'v2u16' (vector of 2 'unsigned short' values)}}
+ v2u16_a = v2u16_a + b;
+ v2u16_a = v2u16_a + a;
+
+ v2u8_a = v2u8_a + d; // expected-error {{cannot convert between scalar type 'unsigned long long' and vector type 'v2u8' (vector of 2 'unsigned char' values) as implicit conversion would cause truncation}}
+ v2u8_a = v2u8_a + c; // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'v2u8' (vector of 2 'unsigned char' values) as implicit conversion would cause truncation}}
+ v2u8_a = v2u8_a + b; // expected-warning {{implicit conversion loses integer precision: 'unsigned short' to 'v2u8' (vector of 2 'unsigned char' values)}}
+ v2u8_a = v2u8_a + a;
+}
+
+void uintTestConstant(v2u64 v2u64_a, v2u32 v2u32_a, v2u16 v2u16_a,
+ v2u8 v2u8_a) {
+
+ v2u64_a = v2u64_a + 0xFFFFFFFFFFFFFFFF;
+ v2u32_a = v2u32_a + 0xFFFFFFFF;
+ v2u16_a = v2u16_a + 0xFFFF;
+ v2u8_a = v2u8_a + 0xFF;
+
+ v2u32_a = v2u32_a + 0x1FFFFFFFF; // expected-warning {{implicit conversion from 'long' to 'v2u32' (vector of 2 'unsigned int' values) changes value from 8589934591 to 4294967295}}
+ v2u16_a = v2u16_a + 0x1FFFF; // expected-warning {{implicit conversion from 'int' to 'v2u16' (vector of 2 'unsigned short' values) changes value from 131071 to 65535}}
+ v2u8_a = v2u8_a + 0x1FF; // expected-error {{cannot convert between scalar type 'int' and vector type 'v2u8' (vector of 2 'unsigned char' values) as implicit conversion would cause truncation}}
+}
+
+void intTestConstant(v2i64 v2i64_a, v2i32 v2i32_a, v2i16 v2i16_a, v2i8 v2i8_a) {
+
+ // Legal upper bounds.
+ v2i64_a = v2i64_a + (long long)0x7FFFFFFFFFFFFFFF;
+ v2i32_a = v2i32_a + (int)0x7FFFFFFF;
+ v2i16_a = v2i16_a + (short)0x7FFF;
+ v2i8_a = v2i8_a + (char)0x7F;
+
+ // Legal lower bounds.
+ v2i64_a = v2i64_a + (-9223372036854775807);
+ v2i32_a = v2i32_a + (-2147483648);
+ v2i16_a = v2i16_a + (-32768);
+ v2i8_a = v2i8_a + (-128);
+
+ // One increment/decrement more than the type can hold
+ v2i32_a = v2i32_a + 2147483648; // expected-warning {{implicit conversion from 'long' to 'v2i32' (vector of 2 'int' values) changes value from 2147483648 to -2147483648}}
+ v2i16_a = v2i16_a + 32768; // expected-warning {{implicit conversion from 'int' to 'v2i16' (vector of 2 'short' values) changes value from 32768 to -32768}}
+ v2i8_a = v2i8_a + 128; // expected-warning {{implicit conversion from 'int' to 'v2i8' (vector of 2 'char' values) changes value from 128 to -128}}
+
+ v2i32_a = v2i32_a + (-2147483649); // expected-warning {{implicit conversion from 'long' to 'v2i32' (vector of 2 'int' values) changes value from -2147483649 to 2147483647}}
+ v2i16_a = v2i16_a + (-32769); // expected-warning {{implicit conversion from 'int' to 'v2i16' (vector of 2 'short' values) changes value from -32769 to 32767}}
+ v2i8_a = v2i8_a + (-129); // expected-error {{cannot convert between scalar type 'int' and vector type 'v2i8' (vector of 2 'char' values) as implicit conversion would cause truncation}}
+}
Index: test/Sema/vector-cast.c
===================================================================
--- test/Sema/vector-cast.c
+++ test/Sema/vector-cast.c
@@ -53,9 +53,8 @@
float2 f2;
double d, a, b, c;
float64x2_t v = {0.0, 1.0};
- // FIXME: These diagnostics are inaccurate: should complain that 'double' to vector 'float2' involves truncation
- f2 += d; // expected-error {{cannot convert between vector values of different size ('float2' (vector of 2 'float' values) and 'double')}}
- d += f2; // expected-error {{cannot convert between vector values of different size}}
+ f2 += d; // expected-error {{cannot convert between scalar type 'double' and vector type 'float2' (vector of 2 'float' values) as implicit conversion would cause truncation}}
+ d += f2; // expected-error {{cannot convert between scalar type 'double' and vector type 'float2' (vector of 2 'float' values) as implicit conversion would cause truncation}}
a = 3.0 + vget_low_f64(v);
b = vget_low_f64(v) + 3.0;
c = vget_low_f64(v);
Index: lib/Sema/SemaExpr.cpp
===================================================================
--- lib/Sema/SemaExpr.cpp
+++ lib/Sema/SemaExpr.cpp
@@ -7957,6 +7957,139 @@
return false;
}
+/// Attempt to convert and splat Scalar into a vector whose types matches
+/// Vector following GCC conversion rules. The main rule is that implicit
+/// conversion occurs when Scalar can be casted to match Vector's element type
+/// without causing truncation of Scalar.
+static bool tryGCCVectorConvertAndSpalt(Sema &S, ExprResult *Scalar,
+ ExprResult *Vector) {
+ QualType ScalarTy = Scalar->get()->getType().getUnqualifiedType();
+ QualType VectorTy = Vector->get()->getType().getUnqualifiedType();
+ const VectorType *VT = VectorTy->getAs<VectorType>();
+ QualType VectorEltTy = VT->getElementType();
+
+ // Reject cases where the vector element type or the scalar element type are
+ // not integral or floating point types.
+ if (!VectorEltTy->isArithmeticType() || !ScalarTy->isArithmeticType())
+ return true;
+
+ // The conversion to apply to the scalar before splatting it,
+ // if necessary.
+ CastKind ScalarCast = CK_Invalid;
+
+ // Accept cases where the vector elements are integers and the scalar is
+ // an integer.
+ // FIXME: Notionally if the scalar was a floating point value with a precise
+ // integral representation, we could cast it to an appropriate integer
+ // type and then perform the rest of the checks here. GCC as of
+ // pre-release 7.0 does not accept this though.
+ if (VectorEltTy->isIntegralType(S.Context) &&
+ ScalarTy->isIntegralType(S.Context) &&
+ S.Context.getIntegerTypeOrder(VectorEltTy, ScalarTy)) {
+
+ // Reject cases where the value of the scalar is unknown as that would
+ // possibly cause truncation, but accept cases where the scalar can be
+ // demoted without loss of precision.
+ llvm::APSInt Result;
+ bool CstScalar = Scalar->get()->EvaluateAsInt(Result, S.Context);
+ int Order = S.Context.getIntegerTypeOrder(VectorEltTy, ScalarTy);
+ bool ScalarSigned = ScalarTy->hasSignedIntegerRepresentation();
+ bool VectorSigned = VectorTy->hasSignedIntegerRepresentation();
+
+ if (CstScalar) {
+ // If the scalar is constant and is of a higher order and has more active
+ // bits that the vector element type, reject it.
+ unsigned NumBits = ScalarSigned
+ ? (Result.isNegative() ? Result.getMinSignedBits()
+ : Result.getActiveBits())
+ : Result.getActiveBits();
+ if (Order < 0 && S.Context.getIntWidth(VectorEltTy) < NumBits)
+ return true;
+
+ // If the signedness of the scalar type and the vector element type
+ // differs and the number of bits is greater than that of the vector
+ // element reject it.
+ if (ScalarSigned != VectorSigned &&
+ NumBits > S.Context.getIntWidth(VectorEltTy))
+ return true;
+ } else {
+
+ // Reject cases where the value of the scalar is not constant and it's
+ // order is greater than that of the vector element type.
+ if (Order < 0)
+ return true;
+ }
+
+ ScalarCast = CK_IntegralCast;
+ } else if (VectorEltTy->isRealFloatingType()) {
+ if (ScalarTy->isRealFloatingType()) {
+
+ // Reject cases where the scalar type is not a constant and has a higher
+ // Order than the vector element type.
+ llvm::APFloat Result(0.0);
+ bool CstScalar = Scalar->get()->EvaluateAsFloat(Result, S.Context);
+ int Order = S.Context.getFloatingTypeOrder(VectorEltTy, ScalarTy);
+ if (!CstScalar && Order < 0)
+ return true;
+
+ // If the scalar cannot be safely casted to the vector element type,
+ // reject it.
+ if (CstScalar) {
+ bool Truncated = false;
+ Result.convert(S.Context.getFloatTypeSemantics(VectorEltTy),
+ llvm::APFloat::rmNearestTiesToEven, &Truncated);
+ if (Truncated)
+ return true;
+ }
+
+ ScalarCast = CK_FloatingCast;
+ } else if (ScalarTy->isIntegralType(S.Context)) {
+ // Determine if the integer constant can be expressed as a floating point
+ // number of the appropiate type.
+ llvm::APSInt Result;
+ bool CstScalar = Scalar->get()->EvaluateAsInt(Result, S.Context);
+ uint64_t Bits = 0;
+ if (CstScalar) {
+ // Reject constants that would be truncated if they were converted to
+ // the floating point type. Test by simple to/from conversion.
+ // FIXME: Ideally the conversion to an APFloat and from an APFloat
+ // could be avoided if there was a convertFromAPInt method
+ // which could signal back if implicit truncation occurred.
+ llvm::APFloat Float(S.Context.getFloatTypeSemantics(VectorEltTy));
+ Float.convertFromAPInt(Result,
+ ScalarTy->hasSignedIntegerRepresentation(),
+ llvm::APFloat::rmTowardZero);
+ llvm::APSInt ConvertBack(S.Context.getIntWidth(ScalarTy),
+ !ScalarTy->hasSignedIntegerRepresentation());
+ bool ignored = false;
+ Float.convertToInteger(
+ ConvertBack, llvm::APFloat::rmNearestTiesToEven, &ignored);
+ if (Result != ConvertBack)
+ return true;
+ } else {
+ // Reject types that cannot be fully encoded into the mantissa of
+ // the float.
+ Bits = S.Context.getTypeSize(ScalarTy);
+ unsigned FloatPrec = llvm::APFloat::semanticsPrecision(
+ S.Context.getFloatTypeSemantics(VectorEltTy));
+ if (Bits > FloatPrec)
+ return true;
+ }
+
+ ScalarCast = CK_IntegralToFloating;
+ } else
+ return true;
+ }
+
+ // Adjust scalar if desired.
+ if (Scalar) {
+ if (ScalarCast != CK_Invalid)
+ *Scalar = S.ImpCastExprToType(Scalar->get(), VectorEltTy, ScalarCast);
+ *Scalar = S.ImpCastExprToType(Scalar->get(), VectorTy, CK_VectorSplat);
+ }
+ return false;
+}
+
QualType Sema::CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
SourceLocation Loc, bool IsCompAssign,
bool AllowBothBool,
@@ -8025,19 +8158,28 @@
}
}
- // If there's an ext-vector type and a scalar, try to convert the scalar to
+ // If there's an vector type and a scalar, try to convert the scalar to
// the vector element type and splat.
- // FIXME: this should also work for regular vector types as supported in GCC.
- if (!RHSVecType && isa<ExtVectorType>(LHSVecType)) {
- if (!tryVectorConvertAndSplat(*this, &RHS, RHSType,
- LHSVecType->getElementType(), LHSType))
- return LHSType;
+ if (!RHSVecType) {
+ if (isa<ExtVectorType>(LHSVecType)) {
+ if (!tryVectorConvertAndSplat(*this, &RHS, RHSType,
+ LHSVecType->getElementType(), LHSType))
+ return LHSType;
+ } else {
+ if (!tryGCCVectorConvertAndSpalt(*this, &RHS, &LHS))
+ return LHSType;
+ }
}
- if (!LHSVecType && isa<ExtVectorType>(RHSVecType)) {
- if (!tryVectorConvertAndSplat(*this, (IsCompAssign ? nullptr : &LHS),
- LHSType, RHSVecType->getElementType(),
- RHSType))
- return RHSType;
+ if (!LHSVecType) {
+ if (isa<ExtVectorType>(RHSVecType)) {
+ if (!tryVectorConvertAndSplat(*this, (IsCompAssign ? nullptr : &LHS),
+ LHSType, RHSVecType->getElementType(),
+ RHSType))
+ return RHSType;
+ } else {
+ if (!tryGCCVectorConvertAndSpalt(*this, &LHS, &RHS))
+ return RHSType;
+ }
}
// FIXME: The code below also handles convertion between vectors and
@@ -8090,6 +8232,22 @@
return QualType();
}
+
+ // If there is a vector type that is not a ExtVector and a sclar, we reach
+ // this point if scalar could not be converted to the vector's element type
+ // without truncation.
+ if ((RHSVecType && !isa<ExtVectorType>(RHSVecType)) ||
+ (LHSVecType && !isa<ExtVectorType>(LHSVecType))) {
+ QualType Scalar = LHSVecType ? RHSType : LHSType;
+ QualType Vector = LHSVecType ? LHSType : RHSType;
+ unsigned ScalarOrVector = LHSVecType && RHSVecType ? 1 : 0;
+ Diag(Loc,
+ diag::err_typecheck_vector_not_convertable_implict_truncation)
+ << ScalarOrVector << Scalar << Vector;
+
+ return QualType();
+ }
+
// Otherwise, use the generic diagnostic.
Diag(Loc, diag::err_typecheck_vector_not_convertable)
<< LHSType << RHSType
Index: include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- include/clang/Basic/DiagnosticSemaKinds.td
+++ include/clang/Basic/DiagnosticSemaKinds.td
@@ -2322,6 +2322,9 @@
"vector size not an integral multiple of component size">;
def err_attribute_zero_size : Error<"zero vector size">;
def err_attribute_size_too_large : Error<"vector size too large">;
+def err_typecheck_vector_not_convertable_implict_truncation : Error<
+ "cannot convert between %select{scalar|vector}0 type %1 and vector type"
+ " %2 as implicit conversion would cause truncation">;
def err_typecheck_vector_not_convertable : Error<
"cannot convert between vector values of different size (%0 and %1)">;
def err_typecheck_vector_not_convertable_non_scalar : Error<
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