maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Add support for passing variables declared to use a xmm register to asm 

statements using the "x" constraint.

llvm-svn: 122679
This commit is contained in:
Rafael Espindola 2011-01-02 03:59:13 +00:00
parent 85b6d81d41
commit 47731fe3f1
2 changed files with 34 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
clang/lib/CodeGen/CGStmt.cpp
View File

@ -938,7 +938,8 @@ AddVariableConstraints(const std::string &Constraint, const Expr &AsmExpr,
return Constraint;
llvm::StringRef Register = Attr->getLabel();
assert(Target.isValidGCCRegisterName(Register));
if (Constraint != "r") {
// FIXME: We should check which registers are compatible with "r" or "x".
if (Constraint != "r" && Constraint != "x") {
CGM.ErrorUnsupported(&Stmt, "__asm__");
return Constraint;
}

32
clang/test/CodeGen/asm-variable.c
View File

@ -25,3 +25,35 @@ unsigned long long foo(unsigned long long addr, unsigned long long a0,
}
// CHECK: call i64 asm "call *$1", "={rax},r,{rdi},{rsi},{rdx},{rcx},{r8},{r9},~{dirflag},~{fpsr},~{flags}"
unsigned long long foo2(unsigned long long addr, double a0,
double a1, double a2,
double a3, double a4,
double a5, double a6, double a7) {
register double b0 asm("xmm0");
register double b1 asm("xmm1");
register double b2 asm("xmm2");
register double b3 asm("xmm3");
register double b4 asm("xmm4");
register double b5 asm("xmm5");
register double b6 asm("xmm6");
register double b7 asm("xmm7");
register unsigned long long result asm("rax");
b0 = a0;
b1 = a1;
b2 = a2;
b3 = a3;
b4 = a4;
b5 = a5;
b6 = a6;
b7 = a7;
asm("call *%1" : "=r" (result)
: "r"(addr), "x" (b0), "x" (b1), "x" (b2), "x" (b3), "x" (b4), "x" (b5), "x" (b6),
"x" (b7));
return result;
}
// CHECK: call i64 asm "call *$1", "={rax},r,{xmm0},{xmm1},{xmm2},{xmm3},{xmm4},{xmm5},{xmm6},{xmm7},~{dirflag},~{fpsr},~{flags}