[AMDGPU] [DAGCombiner] Precommit test for D133584

Change-Id: I488ac9b23718f8d0b28db034c4cc455ae736e785

diff --git a/llvm/test/CodeGen/AMDGPU/combine-vload-extract.ll b/llvm/test/CodeGen/AMDGPU/combine-vload-extract.ll
new file mode 100644 (file)
index 0000000..e977a71
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/combine-vload-extract.ll
@@ -0,0 +1,81 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -march=amdgcn -mcpu=gfx90a -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
+
+define amdgpu_kernel void @vectorLoadCombine(<4 x i8>* %in, i32* %out) {
+; GCN-LABEL: vectorLoadCombine:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x24
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    v_mov_b32_e32 v0, s0
+; GCN-NEXT:    v_mov_b32_e32 v1, s1
+; GCN-NEXT:    flat_load_dword v2, v[0:1]
+; GCN-NEXT:    s_mov_b32 s0, 0x6050400
+; GCN-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-NEXT:    v_mov_b32_e32 v1, s3
+; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_bfe_u32 v3, v2, 8, 8
+; GCN-NEXT:    v_and_b32_e32 v4, 0xff0000, v2
+; GCN-NEXT:    v_perm_b32 v3, v3, v2, s0
+; GCN-NEXT:    v_and_b32_e32 v2, 0xff000000, v2
+; GCN-NEXT:    v_or3_b32 v2, v3, v4, v2
+; GCN-NEXT:    flat_store_dword v[0:1], v2
+; GCN-NEXT:    s_endpgm
+entry:
+  %0 = load <4 x i8>, <4 x i8>* %in, align 4
+  %1 = extractelement <4 x i8> %0, i32 0
+  %2 = extractelement <4 x i8> %0, i32 1
+  %3 = extractelement <4 x i8> %0, i32 2
+  %4 = extractelement <4 x i8> %0, i32 3
+  %zext0 = zext i8 %1 to i32
+  %zext1 = zext i8 %2 to i32
+  %shift1 = shl nuw nsw i32 %zext1, 8
+  %insert1 = or i32 %shift1, %zext0
+  %zext2 = zext i8 %3 to i32
+  %shift2 = shl nuw nsw i32 %zext2, 16
+  %insert2 = or i32 %insert1, %shift2
+  %zext3 = zext i8 %4 to i32
+  %shift3 = shl nuw i32 %zext3, 24
+  %insert3 = or i32 %insert2, %shift3
+  store i32 %insert3, i32* %out
+  ret void
+}
+
+define amdgpu_kernel void @vectorLoadShuffle(<4 x i8>* %in, i32* %out) {
+; GCN-LABEL: vectorLoadShuffle:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x24
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    v_mov_b32_e32 v0, s0
+; GCN-NEXT:    v_mov_b32_e32 v1, s1
+; GCN-NEXT:    flat_load_dword v2, v[0:1]
+; GCN-NEXT:    s_mov_b32 s0, 0x6050400
+; GCN-NEXT:    v_mov_b32_e32 v0, s2
+; GCN-NEXT:    v_mov_b32_e32 v1, s3
+; GCN-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_bfe_u32 v3, v2, 16, 8
+; GCN-NEXT:    v_lshlrev_b32_e32 v4, 8, v2
+; GCN-NEXT:    v_perm_b32 v3, v3, v2, s0
+; GCN-NEXT:    v_and_b32_e32 v4, 0xff0000, v4
+; GCN-NEXT:    v_and_b32_e32 v2, 0xff000000, v2
+; GCN-NEXT:    v_or3_b32 v2, v3, v4, v2
+; GCN-NEXT:    flat_store_dword v[0:1], v2
+; GCN-NEXT:    s_endpgm
+entry:
+  %0 = load <4 x i8>, <4 x i8>* %in, align 4
+  %1 = extractelement <4 x i8> %0, i32 0
+  %2 = extractelement <4 x i8> %0, i32 1
+  %3 = extractelement <4 x i8> %0, i32 2
+  %4 = extractelement <4 x i8> %0, i32 3
+  %zext0 = zext i8 %1 to i32
+  %zext1 = zext i8 %3 to i32
+  %shift1 = shl nuw nsw i32 %zext1, 8
+  %insert1 = or i32 %shift1, %zext0
+  %zext2 = zext i8 %2 to i32
+  %shift2 = shl nuw nsw i32 %zext2, 16
+  %insert2 = or i32 %insert1, %shift2
+  %zext3 = zext i8 %4 to i32
+  %shift3 = shl nuw i32 %zext3, 24
+  %insert3 = or i32 %insert2, %shift3
+  store i32 %insert3, i32* %out
+  ret void
+}