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