9796b0e9f9
This PR is to add support for the 'freeze' instruction: https://llvm.org/docs/LangRef.html#freeze-instruction There is no way to implement `freeze` correctly without support on SPIR-V standard side, but we may at least address a simple (static) case when undef/poison value presence is obvious. The main benefit of even incomplete `freeze` support is preventing of translation from crashing due to lack of support on legalization and instruction selection steps.
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s
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; TODO: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
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; CHECK: OpName %[[Arg1:.*]] "arg1"
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; CHECK: OpName %[[Arg2:.*]] "arg2"
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; CHECK: OpName %[[NotAStaticPoison:.*]] "poison1"
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; CHECK: OpName %[[NotAStaticPoison]] "nil0"
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; CHECK: OpName %[[StaticPoisonIntFreeze:.*]] "nil1"
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; CHECK: OpName %[[StaticPoisonFloatFreeze:.*]] "nil2"
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; CHECK: OpName %[[Arg1]] "val1"
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; CHECK: OpName %[[Const100:.*]] "val2"
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; CHECK: OpName %[[Const100]] "val3"
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; CHECK: OpDecorate
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; CHECK-DAG: %[[FloatTy:.*]] = OpTypeFloat 32
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; CHECK-DAG: %[[ShortTy:.*]] = OpTypeInt 16 0
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; CHECK-DAG: %[[IntTy:.*]] = OpTypeInt 32 0
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; CHECK-DAG: %[[Undef:.*]] = OpUndef %[[ShortTy]]
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; CHECK-DAG: %[[Const100]] = OpConstant %[[IntTy]] 100
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; CHECK-DAG: %[[StaticPoisonIntFreeze]] = OpConstantNull %[[IntTy]]
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; CHECK-DAG: %[[StaticPoisonFloatFreeze]] = OpConstantNull %[[FloatTy]]
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; CHECK: %[[Arg1]] = OpFunctionParameter %[[FloatTy]]
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; CHECK: %[[NotAStaticPoison]] = OpIAdd %[[ShortTy]] %[[Arg2]] %[[Undef]]
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target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-n8:16:32:64"
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target triple = "spir64-unknown-unknown"
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define spir_func void @foo(float %arg1, i16 %arg2) {
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entry:
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%poison1 = add i16 %arg2, undef
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%nil0 = freeze i16 %poison1
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%nil1 = freeze i32 undef
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%nil2 = freeze float poison
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%val1 = freeze float %arg1
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%val2 = freeze i32 100
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%val3 = freeze i32 %val2
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ret void
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}
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