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24 lines
645 B
24 lines
645 B
; RUN: llc < %s | FileCheck %s
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target triple = "nvptx64-nvidia-cuda"
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declare void @llvm.nvvm.barrier0()
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; Load a value, then syncthreads. Branch, and use the loaded value only on one
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; side of the branch. The load shouldn't be sunk beneath the call, because
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; syncthreads is modeled as maystore.
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define i32 @f(i32 %x, i32* %ptr, i1 %cond) {
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Start:
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; CHECK: ld.u32
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%ptr_val = load i32, i32* %ptr
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; CHECK: bar.sync
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call void @llvm.nvvm.barrier0()
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br i1 %cond, label %L1, label %L2
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L1:
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%ptr_val2 = add i32 %ptr_val, 100
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br label %L2
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L2:
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%v4 = phi i32 [ %x, %Start ], [ %ptr_val2, %L1 ]
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%v5 = add i32 %v4, 1000
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ret i32 %v5
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}
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