78 lines
4.0 KiB
LLVM
78 lines
4.0 KiB
LLVM
; RUN: not --crash llc -mtriple=amdgcn--amdhsa -mcpu=gfx900 -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s
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; This ends up needing to spill SGPRs to memory, and also does not
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; have any free SGPRs available to save the exec mask when doing so.
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; The register scavenger also needs to use the emergency stack slot,
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; which tries to place the scavenged register restore instruction as
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; far the block as possible, near the terminator. This places a
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; restore instruction between the condition and the conditional
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; branch, which gets expanded into a sequence involving s_not_b64 on
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; the exec mask, clobbering SCC value before the branch. We probably
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; have to stop relying on being able to flip and restore the exec
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; mask, and always require a free SGPR for saving exec.
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; CHECK: *** Bad machine code: Using an undefined physical register ***
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; CHECK-NEXT: - function: kernel0
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; CHECK-NEXT: - basic block: %bb.0
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; CHECK-NEXT: - instruction: S_CBRANCH_SCC1 %bb.2, implicit killed $scc
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; CHECK-NEXT: - operand 1: implicit killed $scc
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define amdgpu_kernel void @kernel0(i32 addrspace(1)* %out, i32 %in) #1 {
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call void asm sideeffect "", "~{v[0:7]}" () #0
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call void asm sideeffect "", "~{v[8:15]}" () #0
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call void asm sideeffect "", "~{v[16:19]}"() #0
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call void asm sideeffect "", "~{v[20:21]}"() #0
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call void asm sideeffect "", "~{v22}"() #0
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%val0 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
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%val1 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
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%val2 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
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%val3 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
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%val4 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
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%val5 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
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%val6 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
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%val7 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
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%val8 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
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%val9 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
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%val10 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
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%val11 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
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%val12 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
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%val13 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
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%val14 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
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%val15 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
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%val16 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
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%val17 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
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%val18 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
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%val19 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
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%cmp = icmp eq i32 %in, 0
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br i1 %cmp, label %bb0, label %ret
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bb0:
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call void asm sideeffect "; use $0", "s"(<2 x i32> %val0) #0
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call void asm sideeffect "; use $0", "s"(<4 x i32> %val1) #0
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call void asm sideeffect "; use $0", "s"(<8 x i32> %val2) #0
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call void asm sideeffect "; use $0", "s"(<16 x i32> %val3) #0
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call void asm sideeffect "; use $0", "s"(<2 x i32> %val4) #0
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call void asm sideeffect "; use $0", "s"(<4 x i32> %val5) #0
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call void asm sideeffect "; use $0", "s"(<8 x i32> %val6) #0
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call void asm sideeffect "; use $0", "s"(<16 x i32> %val7) #0
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call void asm sideeffect "; use $0", "s"(<2 x i32> %val8) #0
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call void asm sideeffect "; use $0", "s"(<4 x i32> %val9) #0
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call void asm sideeffect "; use $0", "s"(<8 x i32> %val10) #0
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call void asm sideeffect "; use $0", "s"(<16 x i32> %val11) #0
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call void asm sideeffect "; use $0", "s"(<2 x i32> %val12) #0
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call void asm sideeffect "; use $0", "s"(<4 x i32> %val13) #0
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call void asm sideeffect "; use $0", "s"(<8 x i32> %val14) #0
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call void asm sideeffect "; use $0", "s"(<16 x i32> %val15) #0
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call void asm sideeffect "; use $0", "s"(<2 x i32> %val16) #0
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call void asm sideeffect "; use $0", "s"(<4 x i32> %val17) #0
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call void asm sideeffect "; use $0", "s"(<8 x i32> %val18) #0
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call void asm sideeffect "; use $0", "s"(<16 x i32> %val19) #0
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br label %ret
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ret:
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ret void
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}
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attributes #0 = { nounwind }
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attributes #1 = { nounwind "amdgpu-waves-per-eu"="10,10" }
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