Index: cfe/trunk/lib/Basic/Targets.cpp =================================================================== --- cfe/trunk/lib/Basic/Targets.cpp +++ cfe/trunk/lib/Basic/Targets.cpp @@ -1826,8 +1826,15 @@ } bool validateAsmConstraint(const char *&Name, - TargetInfo::ConstraintInfo &info) const override { - return true; + TargetInfo::ConstraintInfo &Info) const override { + switch (*Name) { + default: break; + case 'v': // vgpr + case 's': // sgpr + Info.setAllowsRegister(); + return true; + } + return false; } ArrayRef getTargetBuiltins() const override { Index: cfe/trunk/test/Sema/inline-asm-validate-amdgpu.cl =================================================================== --- cfe/trunk/test/Sema/inline-asm-validate-amdgpu.cl +++ cfe/trunk/test/Sema/inline-asm-validate-amdgpu.cl @@ -0,0 +1,14 @@ +// REQUIRES: amdgpu-registered-target +// RUN: %clang_cc1 -x cl -triple amdgcn -fsyntax-only %s +// expected-no-diagnostics + +kernel void test () { + + int sgpr = 0, vgpr = 0, imm = 0; + + // sgpr constraints + __asm__ ("s_mov_b32 %0, %1" : "=s" (sgpr) : "s" (imm) : ); + + // vgpr constraints + __asm__ ("v_mov_b32 %0, %1" : "=v" (vgpr) : "v" (imm) : ); +}