[llvm] r226734 - R600: Add checks for urem/srem by a constant

[Matt Arsenault]

Author: arsenm
Date: Wed Jan 21 16:56:15 2015
New Revision: 226734

URL: http://llvm.org/viewvc/llvm-project?rev=226734&view=rev
Log:
R600: Add checks for urem/srem by a constant

Make sure this uses the faster expansion using magic constants
to avoid the full division path.

Modified:
    llvm/trunk/test/CodeGen/R600/srem.ll
    llvm/trunk/test/CodeGen/R600/urem.ll

Modified: llvm/trunk/test/CodeGen/R600/srem.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/R600/srem.ll?rev=226734&r1=226733&r2=226734&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/R600/srem.ll (original)
+++ llvm/trunk/test/CodeGen/R600/srem.ll Wed Jan 21 16:56:15 2015
@@ -1,4 +1,4 @@
-; RUN: llc -march=amdgcn -mcpu=SI < %s
+; RUN: llc -march=amdgcn -mcpu=SI < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
 ; RUN: llc -march=r600 -mcpu=redwood < %s
 
 define void @srem_i32(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
@@ -16,6 +16,19 @@ define void @srem_i32_4(i32 addrspace(1)
   store i32 %result, i32 addrspace(1)* %out
   ret void
 }
+
+; FUNC-LABEL: {{^}}srem_i32_7:
+; SI: v_mov_b32_e32 [[MAGIC:v[0-9]+]], 0x92492493
+; SI: v_mul_hi_i32 {{v[0-9]+}}, [[MAGIC]],
+; SI: v_mul_lo_i32
+; SI: v_sub_i32
+; SI: s_endpgm
+define void @srem_i32_7(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
+  %num = load i32 addrspace(1) * %in
+  %result = srem i32 %num, 7
+  store i32 %result, i32 addrspace(1)* %out
+  ret void
+}
 
 define void @srem_v2i32(<2 x i32> addrspace(1)* %out, <2 x i32> addrspace(1)* %in) {
   %den_ptr = getelementptr <2 x i32> addrspace(1)* %in, i32 1

Modified: llvm/trunk/test/CodeGen/R600/urem.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/R600/urem.ll?rev=226734&r1=226733&r2=226734&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/R600/urem.ll (original)
+++ llvm/trunk/test/CodeGen/R600/urem.ll Wed Jan 21 16:56:15 2015
@@ -17,6 +17,21 @@ define void @test_urem_i32(i32 addrspace
   ret void
 }
 
+; FUNC-LABEL: {{^}}test_urem_i32_7:
+; SI: v_mov_b32_e32 [[MAGIC:v[0-9]+]], 0x24924925
+; SI: v_mul_hi_u32 {{v[0-9]+}}, [[MAGIC]]
+; SI: v_subrev_i32
+; SI: v_mul_lo_i32
+; SI: v_sub_i32
+; SI: buffer_store_dword
+; SI: s_endpgm
+define void @test_urem_i32_7(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
+  %num = load i32 addrspace(1) * %in
+  %result = urem i32 %num, 7
+  store i32 %result, i32 addrspace(1)* %out
+  ret void
+}
+
 ; FUNC-LABEL: {{^}}test_urem_v2i32:
 ; SI: s_endpgm
 ; EG: CF_END