pengfei created this revision.
pengfei added reviewers: asavonic, erichkeane, nickdesaulniers.
pengfei requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
We should match GCC's behavior which allows floating-point type for -mno-x87
option on 32-bits. https://godbolt.org/z/KrbhfWc9o
The previous block issues have partially been fixed by D112143
<https://reviews.llvm.org/D112143>.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D114162
Files:
clang/lib/Basic/Targets/X86.cpp
clang/test/Sema/x86-no-x87.cpp
clang/test/Sema/x86_64-no-x87.cpp
Index: clang/test/Sema/x86_64-no-x87.cpp
===================================================================
--- clang/test/Sema/x86_64-no-x87.cpp
+++ /dev/null
@@ -1,145 +0,0 @@
-// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu -target-feature -x87
-// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu -DNOERROR
-
-#ifdef NOERROR
-// expected-no-diagnostics
-#endif
-
-typedef long double long_double;
-
-// Declaration is fine, unless it is called or defined.
-double decl(long_double x, long_double y);
-
-template <typename T>
-T decl_ld_del(T);
-
-// No code is generated for deleted functions
-long_double decl_ld_del(long_double) = delete;
-double decl_ld_del(double) = delete;
-float decl_ld_del(float) = delete;
-
-#ifndef NOERROR
-// expected-error@+4{{'def' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-// expected-note@+3{{'def' defined here}}
-// expected-note@+2{{'x' defined here}}
-#endif
-int def(long_double x) {
-#ifndef NOERROR
-// expected-error@+2{{'x' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- return (int)x;
-}
-
-#ifndef NOERROR
-// expected-note@+3{{'ld_args' defined here}}
-// expected-note@+2{{'ld_args' defined here}}
-#endif
-int ld_args(long_double x, long_double y);
-
-int call1(float x, float y) {
-#ifndef NOERROR
- // expected-error@+2 2{{'ld_args' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- return ld_args(x, y);
-}
-
-#ifndef NOERROR
-// expected-note@+2{{'ld_ret' defined here}}
-#endif
-long_double ld_ret(double x, double y);
-
-int call2(float x, float y) {
-#ifndef NOERROR
- // expected-error@+2{{'ld_ret' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- return (int)ld_ret(x, y);
-}
-
-int binop(double x, double y) {
-#ifndef NOERROR
- // expected-error@+2 2{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- double z = (long_double)x * (long_double)y;
- return (int)z;
-}
-
-void assign1(long_double *ret, double x) {
-#ifndef NOERROR
- // expected-error@+2{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- *ret = x;
-}
-
-struct st_long_double1 {
-#ifndef NOERROR
- // expected-note@+2{{'ld' defined here}}
-#endif
- long_double ld;
-};
-
-struct st_long_double2 {
-#ifndef NOERROR
- // expected-note@+2{{'ld' defined here}}
-#endif
- long_double ld;
-};
-
-struct st_long_double3 {
-#ifndef NOERROR
- // expected-note@+2{{'ld' defined here}}
-#endif
- long_double ld;
-};
-
-void assign2() {
- struct st_long_double1 st;
-#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- st.ld = 0.42;
-}
-
-void assign3() {
- struct st_long_double2 st;
-#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- st.ld = 42;
-}
-
-void assign4(double d) {
- struct st_long_double3 st;
-#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
-#endif
- st.ld = d;
-}
-
-void assign5() {
- // unused variable declaration is fine
- long_double ld = 0.42;
-}
-
-// Double and Float return type on x86_64 do not use x87 registers
-double d_ret1(float x) {
- return 0.0;
-}
-
-double d_ret2(float x);
-
-int d_ret3(float x) {
- return (int)d_ret2(x);
-}
-
-float f_ret1(float x) {
- return 0.0f;
-}
-
-float f_ret2(float x);
-
-int f_ret3(float x) {
- return (int)f_ret2(x);
-}
Index: clang/test/Sema/x86-no-x87.cpp
===================================================================
--- clang/test/Sema/x86-no-x87.cpp
+++ clang/test/Sema/x86-no-x87.cpp
@@ -1,5 +1,6 @@
-// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i686-linux-gnu -target-feature -x87 -DRET_ERROR
-// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i686-linux-gnu -DNOERROR
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu -target-feature -x87
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu -DNOERROR
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i686-linux-gnu -target-feature -x87 -DNOERROR
#ifdef NOERROR
// expected-no-diagnostics
@@ -19,13 +20,13 @@
float decl_ld_del(float) = delete;
#ifndef NOERROR
-// expected-error@+4{{'def' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+// expected-error@+4{{'def' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
// expected-note@+3{{'def' defined here}}
// expected-note@+2{{'x' defined here}}
#endif
int def(long_double x) {
#ifndef NOERROR
-// expected-error@+2{{'x' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+// expected-error@+2{{'x' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
return (int)x;
}
@@ -38,7 +39,7 @@
int call1(float x, float y) {
#ifndef NOERROR
- // expected-error@+2 2{{'ld_args' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+2 2{{'ld_args' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
return ld_args(x, y);
}
@@ -50,14 +51,14 @@
int call2(float x, float y) {
#ifndef NOERROR
- // expected-error@+2{{'ld_ret' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+2{{'ld_ret' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
return (int)ld_ret(x, y);
}
int binop(double x, double y) {
#ifndef NOERROR
- // expected-error@+2 2{{expression requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+2 2{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
double z = (long_double)x * (long_double)y;
return (int)z;
@@ -65,7 +66,7 @@
void assign1(long_double *ret, double x) {
#ifndef NOERROR
- // expected-error@+2{{expression requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+2{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
*ret = x;
}
@@ -94,8 +95,8 @@
void assign2() {
struct st_long_double1 st;
#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
+ // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
st.ld = 0.42;
}
@@ -103,8 +104,8 @@
void assign3() {
struct st_long_double2 st;
#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
+ // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
st.ld = 42;
}
@@ -112,8 +113,8 @@
void assign4(double d) {
struct st_long_double3 st;
#ifndef NOERROR
- // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
- // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'i686-unknown-linux-gnu' does not support it}}
+ // expected-error@+3{{expression requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
+ // expected-error@+2{{'ld' requires 'long_double' (aka 'long double') type support, but target 'x86_64-unknown-linux-gnu' does not support it}}
#endif
st.ld = d;
}
@@ -123,42 +124,23 @@
long_double ld = 0.42;
}
-#ifndef NOERROR
-// expected-note@+3{{'d_ret1' defined here}}
-// expected-error@+2{{'d_ret1' requires 'double' return type support, but target 'i686-unknown-linux-gnu' does not support it}}
-#endif
+// Double and Float return type on x86_64 do not use x87 registers
double d_ret1(float x) {
return 0.0;
}
-#ifndef NOERROR
-// expected-note@+2{{'d_ret2' defined here}}
-#endif
double d_ret2(float x);
int d_ret3(float x) {
-#ifndef NOERROR
- // expected-error@+2{{'d_ret2' requires 'double' return type support, but target 'i686-unknown-linux-gnu' does not support it}}
-#endif
return (int)d_ret2(x);
}
-#ifndef NOERROR
-// expected-note@+3{{'f_ret1' defined here}}
-// expected-error@+2{{'f_ret1' requires 'float' return type support, but target 'i686-unknown-linux-gnu' does not support it}}
-#endif
float f_ret1(float x) {
return 0.0f;
}
-#ifndef NOERROR
-// expected-note@+2{{'f_ret2' defined here}}
-#endif
float f_ret2(float x);
int f_ret3(float x) {
-#ifndef NOERROR
- // expected-error@+2{{'f_ret2' requires 'float' return type support, but target 'i686-unknown-linux-gnu' does not support it}}
-#endif
return (int)f_ret2(x);
}
Index: clang/lib/Basic/Targets/X86.cpp
===================================================================
--- clang/lib/Basic/Targets/X86.cpp
+++ clang/lib/Basic/Targets/X86.cpp
@@ -382,12 +382,9 @@
SimdDefaultAlign =
hasFeature("avx512f") ? 512 : hasFeature("avx") ? 256 : 128;
- if (!HasX87) {
- if (LongDoubleFormat == &llvm::APFloat::x87DoubleExtended())
- HasLongDouble = false;
- if (getTriple().getArch() == llvm::Triple::x86)
- HasFPReturn = false;
- }
+ if (!HasX87 && getTriple().getArch() == llvm::Triple::x86_64 &&
+ LongDoubleFormat == &llvm::APFloat::x87DoubleExtended())
+ HasLongDouble = false;
return true;
}
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