[NVPTX] Add baseline srl-shl-zext tests from #138290 #139878
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@llvm/pr-subscribers-backend-nvptx Author: Simon Pilgrim (RKSimon) ChangesFull diff: https://github.com/llvm/llvm-project/pull/139878.diff 1 Files Affected:
diff --git a/llvm/test/CodeGen/NVPTX/shift-opt.ll b/llvm/test/CodeGen/NVPTX/shift-opt.ll
new file mode 100644
index 0000000000000..5f5ad831cb148
--- /dev/null
+++ b/llvm/test/CodeGen/NVPTX/shift-opt.ll
@@ -0,0 +1,192 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc < %s -mtriple=nvptx64 | FileCheck %s
+
+; Fold: srl (or (x, shl(zext(y),c1)),c1) -> or(srl(x,c1), zext(y))
+; c1 <= leadingzeros(zext(y))
+define i64 @test_or(i64 %x, i32 %y) {
+; CHECK-LABEL: test_or(
+; CHECK: {
+; CHECK-NEXT: .reg .b32 %r<2>;
+; CHECK-NEXT: .reg .b64 %rd<5>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_or_param_0];
+; CHECK-NEXT: ld.param.b32 %r1, [test_or_param_1];
+; CHECK-NEXT: mul.wide.u32 %rd2, %r1, 32;
+; CHECK-NEXT: or.b64 %rd3, %rd1, %rd2;
+; CHECK-NEXT: shr.u64 %rd4, %rd3, 5;
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd4;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 5
+ %or = or i64 %x, %shl
+ %srl = lshr i64 %or, 5
+ ret i64 %srl
+}
+
+; Fold: srl (xor (x, shl(zext(y),c1)),c1) -> xor(srl(x,c1), zext(y))
+; c1 <= leadingzeros(zext(y))
+define i64 @test_xor(i64 %x, i32 %y) {
+; CHECK-LABEL: test_xor(
+; CHECK: {
+; CHECK-NEXT: .reg .b32 %r<2>;
+; CHECK-NEXT: .reg .b64 %rd<5>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_xor_param_0];
+; CHECK-NEXT: ld.param.b32 %r1, [test_xor_param_1];
+; CHECK-NEXT: mul.wide.u32 %rd2, %r1, 32;
+; CHECK-NEXT: xor.b64 %rd3, %rd1, %rd2;
+; CHECK-NEXT: shr.u64 %rd4, %rd3, 5;
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd4;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 5
+ %or = xor i64 %x, %shl
+ %srl = lshr i64 %or, 5
+ ret i64 %srl
+}
+
+; Fold: srl (and (x, shl(zext(y),c1)),c1) -> and(srl(x,c1), zext(y))
+; c1 <= leadingzeros(zext(y))
+define i64 @test_and(i64 %x, i32 %y) {
+; CHECK-LABEL: test_and(
+; CHECK: {
+; CHECK-NEXT: .reg .b32 %r<2>;
+; CHECK-NEXT: .reg .b64 %rd<5>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_and_param_0];
+; CHECK-NEXT: ld.param.b32 %r1, [test_and_param_1];
+; CHECK-NEXT: mul.wide.u32 %rd2, %r1, 32;
+; CHECK-NEXT: and.b64 %rd3, %rd1, %rd2;
+; CHECK-NEXT: shr.u64 %rd4, %rd3, 5;
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd4;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 5
+ %or = and i64 %x, %shl
+ %srl = lshr i64 %or, 5
+ ret i64 %srl
+}
+
+; Fold: srl (or (x, shl(zext(y),c1)),c1) -> or(srl(x,c1), zext(y))
+; c1 <= leadingzeros(zext(y))
+; x, y - vectors
+define <2 x i16> @test_vec(<2 x i16> %x, <2 x i8> %y) {
+; CHECK-LABEL: test_vec(
+; CHECK: {
+; CHECK-NEXT: .reg .b16 %rs<9>;
+; CHECK-NEXT: .reg .b32 %r<7>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b32 %r1, [test_vec_param_0];
+; CHECK-NEXT: ld.param.b32 %r2, [test_vec_param_1];
+; CHECK-NEXT: and.b32 %r3, %r2, 16711935;
+; CHECK-NEXT: mov.b32 {%rs1, %rs2}, %r3;
+; CHECK-NEXT: shl.b16 %rs3, %rs2, 5;
+; CHECK-NEXT: shl.b16 %rs4, %rs1, 5;
+; CHECK-NEXT: mov.b32 %r4, {%rs4, %rs3};
+; CHECK-NEXT: or.b32 %r5, %r1, %r4;
+; CHECK-NEXT: mov.b32 {%rs5, %rs6}, %r5;
+; CHECK-NEXT: shr.u16 %rs7, %rs6, 5;
+; CHECK-NEXT: shr.u16 %rs8, %rs5, 5;
+; CHECK-NEXT: mov.b32 %r6, {%rs8, %rs7};
+; CHECK-NEXT: st.param.b32 [func_retval0], %r6;
+; CHECK-NEXT: ret;
+ %ext = zext <2 x i8> %y to <2 x i16>
+ %shl = shl <2 x i16> %ext, splat(i16 5)
+ %or = or <2 x i16> %x, %shl
+ %srl = lshr <2 x i16> %or, splat(i16 5)
+ ret <2 x i16> %srl
+}
+
+; Do not fold: srl (or (x, shl(zext(y),c1)),c1) -> or(srl(x,c1), zext(y))
+; Reason: c1 > leadingzeros(zext(y)).
+define i64 @test_negative_c(i64 %x, i32 %y) {
+; CHECK-LABEL: test_negative_c(
+; CHECK: {
+; CHECK-NEXT: .reg .b64 %rd<6>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_negative_c_param_0];
+; CHECK-NEXT: ld.param.b32 %rd2, [test_negative_c_param_1];
+; CHECK-NEXT: shl.b64 %rd3, %rd2, 33;
+; CHECK-NEXT: or.b64 %rd4, %rd1, %rd3;
+; CHECK-NEXT: shr.u64 %rd5, %rd4, 33;
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd5;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 33
+ %or = or i64 %x, %shl
+ %srl = lshr i64 %or, 33
+ ret i64 %srl
+}
+
+declare void @use(i64)
+
+; Do not fold: srl (or (x, shl(zext(y),c1)),c1) -> or(srl(x,c1), zext(y))
+; Reason: multiple usage of "or"
+define i64 @test_negative_use_lop(i64 %x, i32 %y) {
+; CHECK-LABEL: test_negative_use_lop(
+; CHECK: {
+; CHECK-NEXT: .reg .b32 %r<2>;
+; CHECK-NEXT: .reg .b64 %rd<5>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_negative_use_lop_param_0];
+; CHECK-NEXT: ld.param.b32 %r1, [test_negative_use_lop_param_1];
+; CHECK-NEXT: mul.wide.u32 %rd2, %r1, 32;
+; CHECK-NEXT: or.b64 %rd3, %rd1, %rd2;
+; CHECK-NEXT: shr.u64 %rd4, %rd3, 5;
+; CHECK-NEXT: { // callseq 0, 0
+; CHECK-NEXT: .param .b64 param0;
+; CHECK-NEXT: st.param.b64 [param0], %rd3;
+; CHECK-NEXT: call.uni
+; CHECK-NEXT: use,
+; CHECK-NEXT: (
+; CHECK-NEXT: param0
+; CHECK-NEXT: );
+; CHECK-NEXT: } // callseq 0
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd4;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 5
+ %or = or i64 %x, %shl
+ %srl = lshr i64 %or, 5
+ call void @use(i64 %or)
+ ret i64 %srl
+}
+
+; Do not fold: srl (or (x, shl(zext(y),c1)),c1) -> or(srl(x,c1), zext(y))
+; Reason: multiple usage of "shl"
+define i64 @test_negative_use_shl(i64 %x, i32 %y) {
+; CHECK-LABEL: test_negative_use_shl(
+; CHECK: {
+; CHECK-NEXT: .reg .b32 %r<2>;
+; CHECK-NEXT: .reg .b64 %rd<5>;
+; CHECK-EMPTY:
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: ld.param.b64 %rd1, [test_negative_use_shl_param_0];
+; CHECK-NEXT: ld.param.b32 %r1, [test_negative_use_shl_param_1];
+; CHECK-NEXT: mul.wide.u32 %rd2, %r1, 32;
+; CHECK-NEXT: or.b64 %rd3, %rd1, %rd2;
+; CHECK-NEXT: shr.u64 %rd4, %rd3, 5;
+; CHECK-NEXT: { // callseq 1, 0
+; CHECK-NEXT: .param .b64 param0;
+; CHECK-NEXT: st.param.b64 [param0], %rd2;
+; CHECK-NEXT: call.uni
+; CHECK-NEXT: use,
+; CHECK-NEXT: (
+; CHECK-NEXT: param0
+; CHECK-NEXT: );
+; CHECK-NEXT: } // callseq 1
+; CHECK-NEXT: st.param.b64 [func_retval0], %rd4;
+; CHECK-NEXT: ret;
+ %ext = zext i32 %y to i64
+ %shl = shl i64 %ext, 5
+ %or = or i64 %x, %shl
+ %srl = lshr i64 %or, 5
+ call void @use(i64 %shl)
+ ret i64 %srl
+}
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RKSimon
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