R600/SI: Fix multiple SGPR reads when using VCC.

No other SGPR operands are allowed, so if VCC is
used, move the other to a VGPR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195041 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 3 deletions

diff --git a/test/CodeGen/R600/add_i64.ll b/test/CodeGen/R600/add_i64.ll
index 1f846b4ed3..c5c2a11e62 100644
--- a/test/CodeGen/R600/add_i64.ll
+++ b/test/CodeGen/R600/add_i64.ll
@@ -18,13 +18,28 @@ define void @test_i64_vreg(i64 addrspace(1)* noalias %out, i64 addrspace(1)* noa
   ret void
 }
 
-; SI-LABEL: @test_i64_sreg:
-define void @test_i64_sreg(i64 addrspace(1)* noalias %out, i64 %a, i64 %b) {
-  %result = add i64 %a, %b
+; SI-LABEL: @one_sgpr:
+define void @one_sgpr(i64 addrspace(1)* noalias %out, i64 addrspace(1)* noalias %in, i64 addrspace(1)* noalias %in_bar, i64 %a) {
+  %foo = load i64 addrspace(1)* %in, align 8
+  %result = add i64 %foo, %a
   store i64 %result, i64 addrspace(1)* %out
   ret void
 }
 
+; FIXME: This case is broken
+;
+; Swap the arguments. Check that the SGPR -> VGPR copy works with the
+; SGPR as other operand.
+;
+; XXXSI-LABEL: @one_sgpr_reversed:
+; define void @one_sgpr_reversed(i64 addrspace(1)* noalias %out, i64 addrspace(1)* noalias %in, i64 %a) {
+;   %foo = load i64 addrspace(1)* %in, align 8
+;   %result = add i64 %a, %foo
+;   store i64 %result, i64 addrspace(1)* %out
+;   ret void
+; }
+
+
 ; SI-LABEL: @test_v2i64_sreg:
 define void @test_v2i64_sreg(<2 x i64> addrspace(1)* noalias %out, <2 x i64> %a, <2 x i64> %b) {
   %result = add <2 x i64> %a, %b