1 ; RUN: not --crash llc -mtriple=amdgcn--amdhsa -mcpu=gfx900 -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s
3 ; This ends up needing to spill SGPRs to memory, and also does not
4 ; have any free SGPRs available to save the exec mask when doing so.
5 ; The register scavenger also needs to use the emergency stack slot,
6 ; which tries to place the scavenged register restore instruction as
7 ; far the block as possible, near the terminator. This places a
8 ; restore instruction between the condition and the conditional
9 ; branch, which gets expanded into a sequence involving s_not_b64 on
10 ; the exec mask, clobbering SCC value before the branch. We probably
11 ; have to stop relying on being able to flip and restore the exec
12 ; mask, and always require a free SGPR for saving exec.
14 ; CHECK: *** Bad machine code: Using an undefined physical register ***
15 ; CHECK-NEXT: - function: kernel0
16 ; CHECK-NEXT: - basic block: %bb.0
17 ; CHECK-NEXT: - instruction: S_CBRANCH_SCC1 %bb.2, implicit killed $scc
18 ; CHECK-NEXT: - operand 1: implicit killed $scc
19 define amdgpu_kernel void @kernel0(i32 addrspace(1)* %out, i32 %in) #1 {
20 call void asm sideeffect "", "~{v[0:7]}" () #0
21 call void asm sideeffect "", "~{v[8:15]}" () #0
22 call void asm sideeffect "", "~{v[16:19]}"() #0
23 call void asm sideeffect "", "~{v[20:21]}"() #0
24 call void asm sideeffect "", "~{v22}"() #0
26 %val0 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
27 %val1 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
28 %val2 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
29 %val3 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
30 %val4 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
31 %val5 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
32 %val6 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
33 %val7 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
34 %val8 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
35 %val9 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
36 %val10 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
37 %val11 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
38 %val12 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
39 %val13 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
40 %val14 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
41 %val15 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
42 %val16 = call <2 x i32> asm sideeffect "; def $0", "=s" () #0
43 %val17 = call <4 x i32> asm sideeffect "; def $0", "=s" () #0
44 %val18 = call <8 x i32> asm sideeffect "; def $0", "=s" () #0
45 %val19 = call <16 x i32> asm sideeffect "; def $0", "=s" () #0
46 %cmp = icmp eq i32 %in, 0
47 br i1 %cmp, label %bb0, label %ret
50 call void asm sideeffect "; use $0", "s"(<2 x i32> %val0) #0
51 call void asm sideeffect "; use $0", "s"(<4 x i32> %val1) #0
52 call void asm sideeffect "; use $0", "s"(<8 x i32> %val2) #0
53 call void asm sideeffect "; use $0", "s"(<16 x i32> %val3) #0
54 call void asm sideeffect "; use $0", "s"(<2 x i32> %val4) #0
55 call void asm sideeffect "; use $0", "s"(<4 x i32> %val5) #0
56 call void asm sideeffect "; use $0", "s"(<8 x i32> %val6) #0
57 call void asm sideeffect "; use $0", "s"(<16 x i32> %val7) #0
58 call void asm sideeffect "; use $0", "s"(<2 x i32> %val8) #0
59 call void asm sideeffect "; use $0", "s"(<4 x i32> %val9) #0
60 call void asm sideeffect "; use $0", "s"(<8 x i32> %val10) #0
61 call void asm sideeffect "; use $0", "s"(<16 x i32> %val11) #0
62 call void asm sideeffect "; use $0", "s"(<2 x i32> %val12) #0
63 call void asm sideeffect "; use $0", "s"(<4 x i32> %val13) #0
64 call void asm sideeffect "; use $0", "s"(<8 x i32> %val14) #0
65 call void asm sideeffect "; use $0", "s"(<16 x i32> %val15) #0
66 call void asm sideeffect "; use $0", "s"(<2 x i32> %val16) #0
67 call void asm sideeffect "; use $0", "s"(<4 x i32> %val17) #0
68 call void asm sideeffect "; use $0", "s"(<8 x i32> %val18) #0
69 call void asm sideeffect "; use $0", "s"(<16 x i32> %val19) #0
76 attributes #0 = { nounwind }
77 attributes #1 = { nounwind "amdgpu-waves-per-eu"="10,10" }