16e712e7c3
Allow directly storing an immediate instead of requiring that it first be moved into a register. This makes for more compact and readable PTX. An approach similar to this (using a ComplexPattern) this could be used for most PTX instructions to avoid the need for `_[ri]+` variants and boiler-plate.
119 lines
3.5 KiB
LLVM
119 lines
3.5 KiB
LLVM
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 | FileCheck %s --check-prefixes=CHECK,NOALIGN4
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; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 -nvptx-force-min-byval-param-align | FileCheck %s --check-prefixes=CHECK,ALIGN4
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; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
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; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 -nvptx-force-min-byval-param-align | %ptxas-verify %}
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;;; Need 4-byte alignment on ptr passed byval
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define ptx_device void @t1(ptr byval(float) %x) {
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; CHECK: .func t1
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; CHECK: .param .align 4 .b8 t1_param_0[4]
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ret void
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}
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;;; Need 8-byte alignment on ptr passed byval
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define ptx_device void @t2(ptr byval(double) %x) {
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; CHECK: .func t2
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; CHECK: .param .align 8 .b8 t2_param_0[8]
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ret void
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}
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;;; Need 4-byte alignment on float2* passed byval
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%struct.float2 = type { float, float }
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define ptx_device void @t3(ptr byval(%struct.float2) %x) {
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; CHECK: .func t3
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; CHECK: .param .align 4 .b8 t3_param_0[8]
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ret void
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}
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define ptx_device void @t4(ptr byval(i8) %x) {
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; CHECK: .func t4
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; NOALIGN4: .param .align 1 .b8 t4_param_0[1]
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; ALIGN4: .param .align 4 .b8 t4_param_0[1]
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ret void
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}
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;;; Make sure we adjust alignment at the call site as well.
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define ptx_device void @t5(ptr align 2 byval(i8) %x) {
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; CHECK: .func t5
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; NOALIGN4: .param .align 2 .b8 t5_param_0[1]
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; ALIGN4: .param .align 4 .b8 t5_param_0[1]
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; CHECK: {
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; NOALIGN4: .param .align 1 .b8 param0[1];
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; ALIGN4: .param .align 4 .b8 param0[1];
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; CHECK: call.uni
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call void @t4(ptr byval(i8) %x)
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ret void
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}
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;;; Make sure we adjust alignment for a function prototype
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;;; in case of an inderect call.
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declare ptr @getfp(i32 %n)
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%struct.half2 = type { half, half }
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define ptx_device void @t6() {
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; CHECK: .func t6
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%fp = call ptr @getfp(i32 0)
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; CHECK: prototype_2 : .callprototype ()_ (.param .align 8 .b8 _[8]);
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call void %fp(ptr byval(double) null);
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%fp2 = call ptr @getfp(i32 1)
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; NOALIGN4: prototype_4 : .callprototype ()_ (.param .align 2 .b8 _[4]);
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; ALIGN4: prototype_4 : .callprototype ()_ (.param .align 4 .b8 _[4]);
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call void %fp(ptr byval(%struct.half2) null);
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%fp3 = call ptr @getfp(i32 2)
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; NOALIGN4: prototype_6 : .callprototype ()_ (.param .align 1 .b8 _[1]);
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; ALIGN4: prototype_6 : .callprototype ()_ (.param .align 4 .b8 _[1]);
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call void %fp(ptr byval(i8) null);
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ret void
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}
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; CHECK-LABEL: .func check_ptr_align1(
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; CHECK: ld.param.b64 %rd1, [check_ptr_align1_param_0];
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; CHECK-NOT: ld.param.b8
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; CHECK: st.b8 [%rd1+3], 0;
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; CHECK: st.b8 [%rd1+2], 0;
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; CHECK: st.b8 [%rd1+1], 0;
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; CHECK: st.b8 [%rd1], 1;
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; CHECK: ret;
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define void @check_ptr_align1(ptr align 1 %_arg_ptr) {
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entry:
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store i32 1, ptr %_arg_ptr, align 1
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ret void
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}
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; CHECK-LABEL: .func check_ptr_align2(
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; CHECK: ld.param.b64 %rd1, [check_ptr_align2_param_0];
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; CHECK-NOT: ld.param.b16
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; CHECK: st.b16 [%rd1+2], 0;
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; CHECK: st.b16 [%rd1], 2;
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; CHECK: ret;
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define void @check_ptr_align2(ptr align 2 %_arg_ptr) {
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entry:
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store i32 2, ptr %_arg_ptr, align 2
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ret void
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}
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; CHECK-LABEL: .func check_ptr_align4(
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; CHECK: ld.param.b64 %rd1, [check_ptr_align4_param_0];
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; CHECK-NOT: ld.param.b32
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; CHECK: st.b32 [%rd1], 4;
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; CHECK: ret;
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define void @check_ptr_align4(ptr align 4 %_arg_ptr) {
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entry:
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store i32 4, ptr %_arg_ptr, align 4
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ret void
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}
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; CHECK-LABEL: .func check_ptr_align8(
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; CHECK: ld.param.b64 %rd1, [check_ptr_align8_param_0];
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; CHECK: st.b32 [%rd1], 8;
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; CHECK: ret;
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define void @check_ptr_align8(ptr align 8 %_arg_ptr) {
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entry:
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store i32 8, ptr %_arg_ptr, align 8
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ret void
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}
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