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bd11ccb2b9
Summary:
For example, in
struct S {
int *x;
int *y;
};
__global__ void foo(S s) {
int *b = s.y;
// use b
}
"b" is guaranteed to point to global. NVPTX should emit ld.global/st.global for
accessing "b".
Reviewers: jholewinski
Subscribers: llvm-commits, jholewinski
Differential Revision: http://reviews.llvm.org/D11505
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243790 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.6 KiB
LLVM
48 lines
1.6 KiB
LLVM
; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
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target triple = "nvptx64-nvidia-cuda"
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; Verify that both %input and %output are converted to global pointers and then
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; addrspacecast'ed back to the original type.
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define void @kernel(float* %input, float* %output) {
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; CHECK-LABEL: .visible .entry kernel(
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; CHECK: cvta.to.global.u64
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; CHECK: cvta.to.global.u64
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%1 = load float, float* %input, align 4
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; CHECK: ld.global.f32
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store float %1, float* %output, align 4
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; CHECK: st.global.f32
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ret void
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}
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define void @kernel2(float addrspace(1)* %input, float addrspace(1)* %output) {
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; CHECK-LABEL: .visible .entry kernel2(
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; CHECK-NOT: cvta.to.global.u64
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%1 = load float, float addrspace(1)* %input, align 4
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; CHECK: ld.global.f32
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store float %1, float addrspace(1)* %output, align 4
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; CHECK: st.global.f32
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ret void
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}
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%struct.S = type { i32*, i32* }
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define void @ptr_in_byval(%struct.S* byval %input, i32* %output) {
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; CHECK-LABEL: .visible .entry ptr_in_byval(
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; CHECK: cvta.to.global.u64
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; CHECK: cvta.to.global.u64
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%b_ptr = getelementptr inbounds %struct.S, %struct.S* %input, i64 0, i32 1
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%b = load i32*, i32** %b_ptr, align 4
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%v = load i32, i32* %b, align 4
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; CHECK: ld.global.u32
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store i32 %v, i32* %output, align 4
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; CHECK: st.global.u32
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ret void
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}
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!nvvm.annotations = !{!0, !1, !2}
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!0 = !{void (float*, float*)* @kernel, !"kernel", i32 1}
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!1 = !{void (float addrspace(1)*, float addrspace(1)*)* @kernel2, !"kernel", i32 1}
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!2 = !{void (%struct.S*, i32*)* @ptr_in_byval, !"kernel", i32 1}
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