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ad99b9d4f8
If only a single field of a struct phi-argument is used, replace the argument by the field value.
br bb(%str)
bb(%phi):
%f = struct_extract %phi, #Field // the only use of %phi
use %f
is replaced with
%f = struct_extract %str, #Field
br bb(%f)
bb(%phi):
use %phi
This also works if the phi-argument is in a def-use cycle.
The new PhiExpansionPass is in the same file as the RedundantPhiEliminationPass. Therefore I renamed the source file to PhiArgumentOptimizations.cpp
116 lines
2.8 KiB
Plaintext
116 lines
2.8 KiB
Plaintext
// RUN: %target-sil-opt %s -phi-expansion | %FileCheck %s
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sil_stage canonical
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import Builtin
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import Swift
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import SwiftShims
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struct Mystruct {
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@_hasStorage var i: Int { get set }
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@_hasStorage var j: Int { get set }
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init(i: Int)
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}
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// CHECK-LABEL: sil @test_simple
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// CHECK: br bb3(%{{[0-9]*}} : $Int)
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// CHECK: bb3(%{{[0-9]*}} : $Int):
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// CHECK: } // end sil function 'test_simple'
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sil @test_simple : $@convention(thin) (Mystruct, Mystruct) -> Int {
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bb0(%0 : $Mystruct, %1 : $Mystruct):
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cond_br undef, bb1, bb2
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bb1:
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br bb3(%0 : $Mystruct)
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bb2:
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br bb3(%1 : $Mystruct)
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bb3(%5 : $Mystruct):
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%6 = struct_extract %5 : $Mystruct, #Mystruct.i
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return %6 : $Int
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}
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// CHECK-LABEL: sil @test_multiple_struct_extracts
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// CHECK: br bb3(%{{[0-9]*}} : $Int)
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// CHECK: bb3(%{{[0-9]*}} : $Int):
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// CHECK: } // end sil function 'test_multiple_struct_extracts'
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sil @test_multiple_struct_extracts : $@convention(thin) (Mystruct, Mystruct) -> (Int, Int) {
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bb0(%0 : $Mystruct, %1 : $Mystruct):
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cond_br undef, bb1, bb2
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bb1:
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br bb3(%0 : $Mystruct)
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bb2:
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br bb3(%1 : $Mystruct)
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bb3(%5 : $Mystruct):
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%6 = struct_extract %5 : $Mystruct, #Mystruct.i
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%7 = struct_extract %5 : $Mystruct, #Mystruct.i
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%8 = tuple (%6 : $Int, %7 : $Int)
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return %8 : $(Int, Int)
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}
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// CHECK-LABEL: sil @dont_transform_multiple_fields
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// CHECK: br bb3(%{{[0-9]*}} : $Mystruct)
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// CHECK: bb3(%{{[0-9]*}} : $Mystruct):
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// CHECK: } // end sil function 'dont_transform_multiple_fields'
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sil @dont_transform_multiple_fields : $@convention(thin) (Mystruct, Mystruct) -> (Int, Int) {
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bb0(%0 : $Mystruct, %1 : $Mystruct):
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cond_br undef, bb1, bb2
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bb1:
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br bb3(%0 : $Mystruct)
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bb2:
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br bb3(%1 : $Mystruct)
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bb3(%5 : $Mystruct):
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%6 = struct_extract %5 : $Mystruct, #Mystruct.i
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%7 = struct_extract %5 : $Mystruct, #Mystruct.j
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%8 = tuple (%6 : $Int, %7 : $Int)
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return %8 : $(Int, Int)
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}
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// CHECK-LABEL: sil @test_loop_with_br
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// CHECK: br bb1(%{{[0-9]*}} : $Int)
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// CHECK: bb1(%{{[0-9]*}} : $Int):
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// CHECK: br bb1(%{{[0-9]*}} : $Int)
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// CHECK: } // end sil function 'test_loop_with_br'
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sil @test_loop_with_br : $@convention(thin) (Mystruct) -> Int {
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bb0(%0 : $Mystruct):
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br bb1(%0 : $Mystruct)
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bb1(%2 : $Mystruct):
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%3 = struct_extract %2 : $Mystruct, #Mystruct.i
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cond_br undef, bb2, bb3
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bb2:
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br bb1(%2 : $Mystruct)
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bb3:
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return %3 : $Int
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}
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// CHECK-LABEL: sil @test_loop_with_cond_br
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// CHECK: br bb1(%{{[0-9]*}} : $Int)
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// CHECK: bb1(%{{[0-9]*}} : $Int):
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// CHECK: cond_br undef, bb1(%{{[0-9]*}} : $Int), bb2
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// CHECK: } // end sil function 'test_loop_with_cond_br'
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sil @test_loop_with_cond_br : $@convention(thin) (Mystruct) -> Int {
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bb0(%0 : $Mystruct):
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br bb1(%0 : $Mystruct)
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bb1(%2 : $Mystruct):
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%3 = struct_extract %2 : $Mystruct, #Mystruct.i
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cond_br undef, bb1(%2 : $Mystruct), bb2
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bb2:
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return %3 : $Int
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}
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