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29483b3dae
Enable a bunch of types2-related error tests to run successfully, so they no longer have to be disabled in run.go. - directive.go: split it into directive.go and directive2.go, since the possible errors are now split across the parser and noder2, so they can't all be reported in one file. - linkname2.go: similarly, split it into linkname2.go and linkname3.go for the same reason. - issue16428.go, issue17645.go, issue47201.dir/bo.go: handle slightly different wording by types2 - issue5609.go: handle slight different error (array length must be integer vs. array bound too large). - float_lit3.go: handle slightly different wording (overflows float vs cannot convert to float) I purposely didn't try to fix tests yet where there are extra or missing errors on different lines, since that is not easy to make work for both -G=3 and -G=0. In a later change, will flip to make the types2 version match correctly, vs. the -G=0 version. Change-Id: I6079ff258e3b90146335b9995764e3b1b56cda59 Reviewed-on: https://go-review.googlesource.com/c/go/+/368455 Trust: Dan Scales <danscales@google.com> Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
48 lines
1.7 KiB
Go
48 lines
1.7 KiB
Go
// errorcheck
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// Check flagging of invalid conversion of constant to float32/float64 near min/max boundaries.
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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// See float_lit2.go for motivation for these values.
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const (
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two24 = 1.0 * (1 << 24)
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two53 = 1.0 * (1 << 53)
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two64 = 1.0 * (1 << 64)
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two128 = two64 * two64
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two256 = two128 * two128
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two512 = two256 * two256
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two768 = two512 * two256
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two1024 = two512 * two512
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ulp32 = two128 / two24
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max32 = two128 - ulp32
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ulp64 = two1024 / two53
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max64 = two1024 - ulp64
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)
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var x = []interface{}{
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float32(max32 + ulp32/2 - 1), // ok
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float32(max32 + ulp32/2 - two128/two256), // ok
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float32(max32 + ulp32/2), // ERROR "constant 3\.40282e\+38 overflows float32|cannot convert.*to type float32"
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float32(-max32 - ulp32/2 + 1), // ok
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float32(-max32 - ulp32/2 + two128/two256), // ok
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float32(-max32 - ulp32/2), // ERROR "constant -3\.40282e\+38 overflows float32|cannot convert.*to type float32"
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// If the compiler's internal floating point representation
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// is shorter than 1024 bits, it cannot distinguish max64+ulp64/2-1 and max64+ulp64/2.
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float64(max64 + ulp64/2 - two1024/two256), // ok
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float64(max64 + ulp64/2 - 1), // ok
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float64(max64 + ulp64/2), // ERROR "constant 1\.79769e\+308 overflows float64|cannot convert.*to type float64"
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float64(-max64 - ulp64/2 + two1024/two256), // ok
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float64(-max64 - ulp64/2 + 1), // ok
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float64(-max64 - ulp64/2), // ERROR "constant -1\.79769e\+308 overflows float64|cannot convert.*to type float64"
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}
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