Summary: This is how it appears to be handled in GCC and it prevents a
"Unknown mismatch" error in the SelectionDAGBuilder.
Reviewers: venkatra, jyknight, jrtc27
Reviewed By: jyknight, jrtc27
Subscribers: eraman, fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D49218
llvm-svn: 337370
if (Constraint.size() == 1) {
switch (Constraint[0]) {
case 'r':
- if (VT == MVT::v2i32)
+ if (VT == MVT::v2i32 || VT == MVT::f64)
return std::make_pair(0U, &SP::IntPairRegClass);
else
return std::make_pair(0U, &SP::IntRegsRegClass);
tail call void asm sideeffect "faddd $0,$1,$2", "{f20},{f20},{f20}"(double 9.0, double 10.0, double 11.0)
ret void
}
+
+; CHECK-LABEL: test_constraint_r_f64:
+; CHECK: std %o0, [%sp+96]
+; CHECK: ldd [%sp+96], %f0
+define double @test_constraint_r_f64() {
+entry:
+ %0 = call double asm sideeffect "", "=r"()
+ ret double %0
+}