1 files changed, 286 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/R600/shl_add_ptr.ll b/llvm/test/CodeGen/R600/shl_add_ptr.ll
new file mode 100644
index 00000000000..b6197c9932c
--- /dev/null
+++ b/llvm/test/CodeGen/R600/shl_add_ptr.ll
@@ -0,0 +1,286 @@
+; XFAIL: *
+; Enable when patch to perform shl + add constant generic DAG combiner patch is in.
+
+; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+
+; Test that doing a shift of a pointer with a constant add will be
+; folded into the constant offset addressing mode even if the add has
+; multiple uses. This is relevant to accessing 2 separate, adjacent
+; LDS globals.
+
+
+declare i32 @llvm.r600.read.tidig.x() #1
+
+@lds0 = addrspace(3) global [512 x float] zeroinitializer, align 4
+@lds1 = addrspace(3) global [512 x float] zeroinitializer, align 4
+
+
+; Make sure the (add tid, 2) << 2 gets folded into the ds's offset as (tid << 2) + 8
+
+; SI-LABEL: @load_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_READ_B32 {{v[0-9]+}}, [[PTR]], 0x8, [M0]
+; SI: S_ENDPGM
+define void @load_shl_base_lds_0(float addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
+  %val0 = load float addrspace(3)* %arrayidx0, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  store float %val0, float addrspace(1)* %out
+  ret void
+}
+
+; Make sure once the first use is folded into the addressing mode, the
+; remaining add use goes through the normal shl + add constant fold.
+
+; SI-LABEL: @load_shl_base_lds_1
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_READ_B32 [[RESULT:v[0-9]+]], [[PTR]], 0x8, [M0]
+; SI: V_ADD_I32_e32 [[ADDUSE:v[0-9]+]], 8, v{{[0-9]+}}
+; SI-DAG: BUFFER_STORE_DWORD [[RESULT]]
+; SI-DAG: BUFFER_STORE_DWORD [[ADDUSE]]
+; SI: S_ENDPGM
+define void @load_shl_base_lds_1(float addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
+  %val0 = load float addrspace(3)* %arrayidx0, align 4
+  %shl_add_use = shl i32 %idx.0, 2
+  store i32 %shl_add_use, i32 addrspace(1)* %add_use, align 4
+  store float %val0, float addrspace(1)* %out
+  ret void
+}
+
+@maxlds = addrspace(3) global [65536 x i8] zeroinitializer, align 4
+
+; SI-LABEL: @load_shl_base_lds_max_offset
+; SI: DS_READ_U8 v{{[0-9]+}}, v{{[0-9]+}}, 0xffff
+; SI: S_ENDPGM
+define void @load_shl_base_lds_max_offset(i8 addrspace(1)* %out, i8 addrspace(3)* %lds, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 65535
+  %arrayidx0 = getelementptr inbounds [65536 x i8] addrspace(3)* @maxlds, i32 0, i32 %idx.0
+  %val0 = load i8 addrspace(3)* %arrayidx0
+  store i32 %idx.0, i32 addrspace(1)* %add_use
+  store i8 %val0, i8 addrspace(1)* %out
+  ret void
+}
+
+; The two globals are placed adjacent in memory, so the same base
+; pointer can be used with an offset into the second one.
+
+; SI-LABEL: @load_shl_base_lds_2
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI-NEXT: DS_READ_B32 {{v[0-9]+}}, [[PTR]], 0x100, [M0]
+; SI-NEXT: DS_READ_B32 {{v[0-9]+}}, [[PTR]], 0x900, [M0]
+; SI: S_ENDPGM
+define void @load_shl_base_lds_2(float addrspace(1)* %out) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 64
+  %arrayidx0 = getelementptr inbounds [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
+  %val0 = load float addrspace(3)* %arrayidx0, align 4
+  %arrayidx1 = getelementptr inbounds [512 x float] addrspace(3)* @lds1, i32 0, i32 %idx.0
+  %val1 = load float addrspace(3)* %arrayidx1, align 4
+  %sum = fadd float %val0, %val1
+  store float %sum, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; SI-LABEL: @store_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_WRITE_B32 [[PTR]], {{v[0-9]+}}, 0x8 [M0]
+; SI: S_ENDPGM
+define void @store_shl_base_lds_0(float addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x float] addrspace(3)* @lds0, i32 0, i32 %idx.0
+  store float 1.0, float addrspace(3)* %arrayidx0, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+
+; --------------------------------------------------------------------------------
+; Atomics.
+
+@lds2 = addrspace(3) global [512 x i32] zeroinitializer, align 4
+
+; define void @atomic_load_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+;   %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+;   %idx.0 = add nsw i32 %tid.x, 2
+;   %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+;   %val = load atomic i32 addrspace(3)* %arrayidx0 seq_cst, align 4
+;   store i32 %val, i32 addrspace(1)* %out, align 4
+;   store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+;   ret void
+; }
+
+
+; SI-LABEL: @atomic_cmpxchg_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_CMPST_RTN_B32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_cmpxchg_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use, i32 %swap) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %pair = cmpxchg i32 addrspace(3)* %arrayidx0, i32 7, i32 %swap seq_cst monotonic
+  %result = extractvalue { i32, i1 } %pair, 0
+  store i32 %result, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_swap_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_WRXCHG_RTN_B32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_swap_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw xchg i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_add_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_ADD_RTN_U32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_add_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw add i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_sub_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_SUB_RTN_U32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_sub_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw sub i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_and_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_AND_RTN_B32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_and_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw and i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_or_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_OR_RTN_B32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_or_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw or i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_xor_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_XOR_RTN_B32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_xor_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw xor i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; define void @atomic_nand_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+;   %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+;   %idx.0 = add nsw i32 %tid.x, 2
+;   %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+;   %val = atomicrmw nand i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+;   store i32 %val, i32 addrspace(1)* %out, align 4
+;   store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+;   ret void
+; }
+
+; SI-LABEL: @atomic_min_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_MIN_RTN_I32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_min_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw min i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_max_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_MAX_RTN_I32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_max_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw max i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_umin_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_MIN_RTN_U32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_umin_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw umin i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+; SI-LABEL: @atomic_umax_shl_base_lds_0
+; SI: V_LSHLREV_B32_e32 [[PTR:v[0-9]+]], 2, {{v[0-9]+}}
+; SI: DS_MAX_RTN_U32 {{v[0-9]+}}, [[PTR]], {{v[0-9]+}}, 0x8
+; SI: S_ENDPGM
+define void @atomic_umax_shl_base_lds_0(i32 addrspace(1)* %out, i32 addrspace(1)* %add_use) #0 {
+  %tid.x = tail call i32 @llvm.r600.read.tidig.x() #1
+  %idx.0 = add nsw i32 %tid.x, 2
+  %arrayidx0 = getelementptr inbounds [512 x i32] addrspace(3)* @lds2, i32 0, i32 %idx.0
+  %val = atomicrmw umax i32 addrspace(3)* %arrayidx0, i32 3 seq_cst
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i32 %idx.0, i32 addrspace(1)* %add_use, align 4
+  ret void
+}
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone }