# RUN: llc -mtriple=amdgcn -run-pass register-coalescer -verify-machineinstrs -o - %s | FileCheck --check-prefix=GCN %s
#
# See bug http://llvm.org/PR33152 for details of the bug this test is checking
# for.
# This test will provoke a subrange join during simple register
# coalescing. Withough a fix for PR33152 this causes an unreachable in SubRange
# Join
#
# The lines where the problem exhibits are the last 2 copy instructions in the
# BB (bb.25)
#
# GCN-LABEL: bb.6:
# GCN: successors: %bb.7(0x{{[0-9]+}}), %bb.18(0x{{[0-9]+}})
# GCN: %{{[0-9]+}}:vreg_128 = BUFFER_LOAD_DWORDX4_OFFSET %{{[0-9]+}}, 0, 0, 0, 0, implicit $exec
#
--- |
target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5"
target triple = "amdgcn--amdpal"
define amdgpu_ps void @main() #0 {
ret void
}
attributes #0 = { "target-cpu"="gfx803" }
...
---
name: main
tracksRegLiveness: true
body: |
bb.0:
successors: %bb.2(0x40000000), %bb.1(0x40000000)
S_CBRANCH_SCC0 %bb.2, implicit undef $scc
bb.1:
successors: %bb.9(0x80000000)
%0:vreg_128 = IMPLICIT_DEF
S_BRANCH %bb.9
bb.2:
successors: %bb.4(0x40000000), %bb.3(0x40000000)
S_CBRANCH_SCC0 %bb.4, implicit undef $scc
bb.3:
successors: %bb.5(0x80000000)
%1:vreg_128 = IMPLICIT_DEF
S_BRANCH %bb.5
bb.4:
successors: %bb.6(0x80000000)
%2:sreg_64 = S_MOV_B64 0
%3:sreg_32_xm0 = S_MOV_B32 61440
%4:sreg_32_xm0 = S_MOV_B32 -1
%5:sreg_64 = COPY killed %2
%6:vreg_128 = IMPLICIT_DEF
S_BRANCH %bb.6
bb.5:
successors: %bb.9(0x80000000)
%7:vreg_128 = COPY killed %1
%8:vreg_128 = COPY killed %7
%0:vreg_128 = COPY killed %8
S_BRANCH %bb.9
bb.6:
successors: %bb.7(0x40000000), %bb.18(0x40000000)
%9:vreg_128 = COPY killed %6
%10:sreg_64 = COPY killed %5
undef %11.sub2:sgpr_128 = COPY %4
%11.sub3:sgpr_128 = COPY %3
%12:vreg_128 = BUFFER_LOAD_DWORDX4_OFFSET killed %11, 0, 0, 0, 0, implicit $exec
undef %13.sub1:vreg_128 = COPY %9.sub1
%13.sub2:vreg_128 = COPY %9.sub2
%14:sreg_64 = nofpexcept V_CMP_GT_F32_e64 0, target-flags(amdgpu-rel32-lo) 0, 0, killed %12.sub3, 0, implicit $mode, implicit $exec
%15:vgpr_32 = nofpexcept V_ADD_F32_e32 1065353216, undef %16:vgpr_32, implicit $mode, implicit $exec
%17:sreg_64 = nofpexcept V_CMP_GT_F32_e64 0, 0, 0, killed %15, 0, implicit $mode, implicit $exec
%18:sreg_64 = S_AND_B64 killed %17, killed %14, implicit-def dead $scc
%19:sreg_64 = COPY %10
%20:vreg_128 = COPY %13
%21:vreg_128 = IMPLICIT_DEF
%22:sreg_64 = COPY $exec, implicit-def $exec
%23:sreg_64 = S_AND_B64 %22, %18, implicit-def dead $scc
%24:sreg_64 = S_XOR_B64 %23, %22, implicit-def dead $scc
$exec = S_MOV_B64_term killed %23
S_CBRANCH_EXECZ %bb.7, implicit $exec
S_BRANCH %bb.18
bb.7:
successors: %bb.6(0x40000000), %bb.8(0x40000000)
$exec = S_OR_B64 $exec, %24, implicit-def $scc
%25:vreg_128 = COPY killed %21
%26:vreg_128 = COPY killed %20
%27:sreg_64 = COPY killed %19
%28:sreg_64 = S_OR_B64 %24, killed %27, implicit-def dead $scc
%5:sreg_64 = COPY %28
%6:vreg_128 = COPY killed %25
$exec = S_ANDN2_B64_term $exec, %28, implicit-def $scc
S_CBRANCH_EXECNZ %bb.6, implicit $exec
S_BRANCH %bb.8
bb.8:
successors: %bb.5(0x80000000)
$exec = S_OR_B64 $exec, killed %28, implicit-def $scc
%29:vreg_128 = COPY killed %26
%1:vreg_128 = COPY killed %29
S_BRANCH %bb.5
bb.9:
successors: %bb.10(0x80000000)
%30:vreg_128 = COPY killed %0
S_BRANCH %bb.10
bb.10:
successors: %bb.12(0x40000000), %bb.11(0x40000000)
S_CBRANCH_SCC0 %bb.12, implicit undef $scc
bb.11:
successors: %bb.14(0x80000000)
%31:vreg_128 = IMPLICIT_DEF
S_BRANCH %bb.14
bb.12:
successors: %bb.13(0x80000000)
S_CBRANCH_SCC1 %bb.13, implicit undef $scc
S_BRANCH %bb.13
bb.13:
successors: %bb.14(0x80000000)
%32:vgpr_32 = nofpexcept V_MUL_F32_e32 undef %33:vgpr_32, killed %30.sub1, implicit $mode, implicit $exec
%34:vgpr_32 = nofpexcept V_MUL_F32_e32 undef %35:vgpr_32, killed %32, implicit $mode, implicit $exec
undef %36.sub0:vreg_128 = COPY %34
%31:vreg_128 = COPY killed %36
bb.14:
successors: %bb.16(0x40000000), %bb.15(0x40000000)
%37:vreg_128 = COPY killed %31
S_CBRANCH_SCC0 %bb.16, implicit undef $scc
bb.15:
successors: %bb.17(0x80000000)
%38:vreg_128 = IMPLICIT_DEF
S_BRANCH %bb.17
bb.16:
successors: %bb.17(0x80000000)
%39:vgpr_32 = nofpexcept V_FMA_F32_e64 0, undef %40:vgpr_32, 0, killed %37.sub0, 0, undef %41:vgpr_32, 0, 0, implicit $mode, implicit $exec
%42:vgpr_32 = nofpexcept V_FMA_F32_e64 0, undef %43:vgpr_32, 0, undef %44:vgpr_32, 0, killed %39, 0, 0, implicit $mode, implicit $exec
%45:vgpr_32 = nofpexcept V_FMA_F32_e64 0, undef %46:vgpr_32, 0, undef %47:vgpr_32, 0, killed %42, 0, 0, implicit $mode, implicit $exec
dead %48:vgpr_32 = nofpexcept V_MUL_F32_e32 undef %49:vgpr_32, killed %45, implicit $mode, implicit $exec
%50:vgpr_32 = nofpexcept V_MUL_F32_e32 undef %51:vgpr_32, undef %52:vgpr_32, implicit $mode, implicit $exec
undef %53.sub1:vreg_128 = COPY %50
%38:vreg_128 = COPY killed %53
bb.17:
%54:vreg_128 = COPY killed %38
%55:vgpr_32 = nofpexcept V_FMA_F32_e64 0, killed %54.sub1, 0, target-flags(amdgpu-gotprel32-lo) 1056964608, 0, 1056964608, 0, 0, implicit $mode, implicit $exec
EXP 1, undef %56:vgpr_32, killed %55, undef %57:vgpr_32, undef %58:vgpr_32, -1, 0, 15, implicit $exec
S_ENDPGM 0
bb.18:
successors: %bb.7(0x80000000)
dead %59:vgpr_32 = nofpexcept V_FMA_F32_e64 0, killed %9.sub2, 0, undef %60:vgpr_32, 0, undef %61:vgpr_32, 0, 0, implicit $mode, implicit $exec
dead %62:vgpr_32 = BUFFER_LOAD_DWORD_OFFEN undef %63:vgpr_32, undef %64:sgpr_128, undef %65:sreg_32, 0, 0, 0, implicit $exec
undef %66.sub1:vreg_128 = COPY %13.sub1
%66.sub2:vreg_128 = COPY %13.sub2
%67:sreg_64 = nofpexcept V_CMP_NGT_F32_e64 0, 0, 0, undef %68:vgpr_32, 0, implicit $mode, implicit $exec
%69:vgpr_32 = nofpexcept V_ADD_F32_e32 1065353216, undef %70:vgpr_32, implicit $mode, implicit $exec
%71:vgpr_32 = nofpexcept V_ADD_F32_e32 1065353216, killed %69, implicit $mode, implicit $exec
%72:sreg_64 = nofpexcept V_CMP_NGT_F32_e64 0, 0, 0, killed %71, 0, implicit $mode, implicit $exec
%73:sreg_64 = S_OR_B64 killed %72, killed %67, implicit-def dead $scc
%74:sreg_64 = S_OR_B64 killed %73, killed %10, implicit-def dead $scc
%19:sreg_64 = COPY killed %74
%20:vreg_128 = COPY %66
%21:vreg_128 = COPY killed %66
S_BRANCH %bb.7
...
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