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[X86, inlineasm] Do not allow using constraint 'x' for a variable larger than 

128-bit unless the target CPU supports AVX.

rdar://problem/11846140


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218082 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2014-09-18 21:58:54 +00:00
parent dba2234b1b
commit 7877b51ba4
2 changed files with 11 additions and 3 deletions
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3
lib/Basic/Targets.cpp
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@ -3084,7 +3084,8 @@ bool X86TargetInfo::validateOperandSize(StringRef Constraint,
case 'u':
return Size <= 128;
case 'x':
return Size <= 256;
// 256-bit ymm registers can be used if target supports AVX.
return Size <= (SSELevel >= AVX ? 256 : 128);
}
return true;

11
test/CodeGen/x86_32-inline-asm.c
View File

@ -1,4 +1,5 @@
// RUN: %clang_cc1 -triple i386-apple-darwin9 -verify %s
// RUN: %clang_cc1 -triple i386-apple-darwin9 -target-feature +avx -verify %s
// <rdar://problem/12415959>
// rdar://problem/11846140
@ -45,7 +46,6 @@ int func1() {
__asm__ volatile("foo1 %0" : : "f" (val256)); // expected-error {{invalid input size for constraint 'f'}}
__asm__ volatile("foo1 %0" : : "t" (val256)); // expected-error {{invalid input size for constraint 't'}}
__asm__ volatile("foo1 %0" : : "u" (val256)); // expected-error {{invalid input size for constraint 'u'}}
__asm__ volatile("foo1 %0" : : "x" (val256)); // No error.
__asm__ volatile("foo1 %0" : : "x" (val512)); // expected-error {{invalid input size for constraint 'x'}}
__asm__ volatile("foo1 %0" : "=R" (val)); // expected-error {{invalid output size for constraint '=R'}}
@ -60,6 +60,13 @@ int func1() {
__asm__ volatile("foo1 %0" : "=A" (val128)); // expected-error {{invalid output size for constraint '=A'}}
__asm__ volatile("foo1 %0" : "=t" (val256)); // expected-error {{invalid output size for constraint '=t'}}
__asm__ volatile("foo1 %0" : "=u" (val256)); // expected-error {{invalid output size for constraint '=u'}}
__asm__ volatile("foo1 %0" : "=x" (val256)); // No error.
__asm__ volatile("foo1 %0" : "=x" (val512)); // expected-error {{invalid output size for constraint '=x'}}
#ifdef __AVX__
__asm__ volatile("foo1 %0" : : "x" (val256)); // No error.
__asm__ volatile("foo1 %0" : "=x" (val256)); // No error.
#else
__asm__ volatile("foo1 %0" : : "x" (val256)); // expected-error {{invalid input size for constraint 'x'}}
__asm__ volatile("foo1 %0" : "=x" (val256)); // expected-error {{invalid output size for constraint '=x'}}
#endif
}