bc6955f18c
At the moment, the emergency spill slot is a fixed object for entry
functions and chain functions, and a regular stack object otherwise.
This patch adopts the latter behaviour for entry/chain functions too. It
seems this was always the intention [1] and it will also save us a bit
of stack space in cases where the first stack object has a large
alignment.
[1]
34c8b835b1
45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; RUN: llc -O0 -mtriple=amdgcn -verify-machineinstrs < %s | FileCheck %s
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; Test that the alignment of kernel arguments does not impact the
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; alignment of the stack
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; CHECK-LABEL: {{^}}no_args:
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; CHECK: ScratchSize: 8{{$}}
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define amdgpu_kernel void @no_args() {
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%alloca = alloca i8, addrspace(5)
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store volatile i8 0, ptr addrspace(5) %alloca
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ret void
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}
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; CHECK-LABEL: {{^}}force_align32:
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; CHECK: ScratchSize: 8{{$}}
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define amdgpu_kernel void @force_align32(<8 x i32>) {
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%alloca = alloca i8, addrspace(5)
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store volatile i8 0, ptr addrspace(5) %alloca
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ret void
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}
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; CHECK-LABEL: {{^}}force_align64:
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; CHECK: ScratchSize: 8{{$}}
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define amdgpu_kernel void @force_align64(<16 x i32>) {
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%alloca = alloca i8, addrspace(5)
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store volatile i8 0, ptr addrspace(5) %alloca
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ret void
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}
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; CHECK-LABEL: {{^}}force_align128:
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; CHECK: ScratchSize: 8{{$}}
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define amdgpu_kernel void @force_align128(<32 x i32>) {
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%alloca = alloca i8, addrspace(5)
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store volatile i8 0, ptr addrspace(5) %alloca
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ret void
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}
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; CHECK-LABEL: {{^}}force_align256:
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; CHECK: ScratchSize: 8{{$}}
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define amdgpu_kernel void @force_align256(<64 x i32>) {
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%alloca = alloca i8, addrspace(5)
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store volatile i8 0, ptr addrspace(5) %alloca
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ret void
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}
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