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The "noduplicate" function attribute exists to prevent certain optimizations from duplicating calls to the function. This is important on platforms where certain function call duplications are unsafe (for example execution barriers for CUDA and OpenCL). This patch makes it possible to specify intrinsics as "noduplicate" and translates that to the appropriate function attribute. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204200 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
2.6 KiB
LLVM
75 lines
2.6 KiB
LLVM
; RUN: opt < %s -O3 -S | FileCheck %s
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; Make sure the call to syncthreads is not duplicate here by the LLVM
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; optimizations, because it has the noduplicate attribute set.
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; CHECK: call void @llvm.cuda.syncthreads
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; CHECK-NOT: call void @llvm.cuda.syncthreads
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; Function Attrs: nounwind
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define void @foo(float* %output) #1 {
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entry:
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%output.addr = alloca float*, align 8
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store float* %output, float** %output.addr, align 8
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%0 = load float** %output.addr, align 8
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%arrayidx = getelementptr inbounds float* %0, i64 0
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%1 = load float* %arrayidx, align 4
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%conv = fpext float %1 to double
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%cmp = fcmp olt double %conv, 1.000000e+01
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%2 = load float** %output.addr, align 8
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%3 = load float* %2, align 4
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%conv1 = fpext float %3 to double
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%add = fadd double %conv1, 1.000000e+00
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%conv2 = fptrunc double %add to float
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store float %conv2, float* %2, align 4
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br label %if.end
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if.else: ; preds = %entry
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%4 = load float** %output.addr, align 8
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%5 = load float* %4, align 4
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%conv3 = fpext float %5 to double
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%add4 = fadd double %conv3, 2.000000e+00
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%conv5 = fptrunc double %add4 to float
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store float %conv5, float* %4, align 4
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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call void @llvm.cuda.syncthreads()
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%6 = load float** %output.addr, align 8
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%arrayidx6 = getelementptr inbounds float* %6, i64 0
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%7 = load float* %arrayidx6, align 4
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%conv7 = fpext float %7 to double
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%cmp8 = fcmp olt double %conv7, 1.000000e+01
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br i1 %cmp8, label %if.then9, label %if.else13
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if.then9: ; preds = %if.end
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%8 = load float** %output.addr, align 8
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%9 = load float* %8, align 4
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%conv10 = fpext float %9 to double
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%add11 = fadd double %conv10, 3.000000e+00
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%conv12 = fptrunc double %add11 to float
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store float %conv12, float* %8, align 4
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br label %if.end17
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if.else13: ; preds = %if.end
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%10 = load float** %output.addr, align 8
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%11 = load float* %10, align 4
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%conv14 = fpext float %11 to double
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%add15 = fadd double %conv14, 4.000000e+00
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%conv16 = fptrunc double %add15 to float
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store float %conv16, float* %10, align 4
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br label %if.end17
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if.end17: ; preds = %if.else13, %if.then9
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ret void
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}
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; Function Attrs: noduplicate nounwind
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declare void @llvm.cuda.syncthreads() #2
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!0 = metadata !{void (float*)* @foo, metadata !"kernel", i32 1}
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!1 = metadata !{null, metadata !"align", i32 8}
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