derek.holloway
7502bf64a4
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38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc -mtriple=amdgcn -mcpu=gfx950 < %s | FileCheck %s
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; Check that the copy from s[2:3] to v[0:1] occurs inside the loop, not after it.
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define i64 @test_temporal_divergence(i32 %arg) #0 {
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; CHECK-LABEL: test_temporal_divergence:
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; CHECK: ; %bb.0: ; %entry
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; CHECK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; CHECK-NEXT: v_add_u32_e32 v2, 1, v0
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; CHECK-NEXT: s_mov_b64 s[2:3], 0
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; CHECK-NEXT: s_mov_b64 s[0:1], 0
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; CHECK-NEXT: .LBB0_1: ; %loop
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; CHECK-NEXT: ; =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: v_add_u32_e32 v2, -1, v2
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; CHECK-NEXT: v_cmp_eq_u32_e32 vcc, 0, v2
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; CHECK-NEXT: v_mov_b64_e32 v[0:1], s[2:3]
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; CHECK-NEXT: s_or_b64 s[0:1], vcc, s[0:1]
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; CHECK-NEXT: s_mov_b64 s[2:3], 1
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; CHECK-NEXT: s_andn2_b64 exec, exec, s[0:1]
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; CHECK-NEXT: s_cbranch_execnz .LBB0_1
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; CHECK-NEXT: ; %bb.2: ; %end
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; CHECK-NEXT: s_or_b64 exec, exec, s[0:1]
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; CHECK-NEXT: s_setpc_b64 s[30:31]
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entry:
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br label %loop
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loop:
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%i = phi i64 [ 1, %loop ], [ 0, %entry ]
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%count = phi i32 [ %inc, %loop ], [ 0, %entry ]
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%inc = add i32 %count, 1
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%cond = icmp eq i32 %count, %arg
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br i1 %cond, label %end, label %loop
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end:
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ret i64 %i
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}
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