Add support for passing variables declared to use a xmm register to asm
statements using the "x" constraint.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122679 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 8ccd289..b86cdf8 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -938,7 +938,8 @@
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;
}
diff --git a/test/CodeGen/asm-variable.c b/test/CodeGen/asm-variable.c
index 7f74913..a37132d 100644
--- a/test/CodeGen/asm-variable.c
+++ b/test/CodeGen/asm-variable.c
@@ -25,3 +25,35 @@
}
// 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}