AMDGPU: Reduce number of copies emitted
Instead of always inserting a copy in case
the super register is itself a subregister,
only extract to the super reg class if this is
actually the case.
This shouldn't really change codegen, but
makes looking at the output of SIFixSGPRCopies
easier to read.
llvm-svn: 248467
diff --git a/llvm/test/CodeGen/AMDGPU/and.ll b/llvm/test/CodeGen/AMDGPU/and.ll
index 5672d47..8c7c1bc 100644
--- a/llvm/test/CodeGen/AMDGPU/and.ll
+++ b/llvm/test/CodeGen/AMDGPU/and.ll
@@ -147,9 +147,10 @@
ret void
}
+; FIXME: and 0 should be replaced witht copy
; FUNC-LABEL: {{^}}v_and_constant_i64:
; SI: v_and_b32_e32 {{v[0-9]+}}, {{s[0-9]+}}, {{v[0-9]+}}
-; SI: v_and_b32_e32 {{v[0-9]+}}, {{s[0-9]+}}, {{v[0-9]+}}
+; SI: v_and_b32_e32 {{v[0-9]+}}, 0, {{v[0-9]+}}
define void @v_and_constant_i64(i64 addrspace(1)* %out, i64 addrspace(1)* %aptr) {
%a = load i64, i64 addrspace(1)* %aptr, align 8
%and = and i64 %a, 1234567