derek.holloway
7502bf64a4
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76 lines
3.2 KiB
C++
76 lines
3.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsyntax-only -DCHECK_ERROR %s -verify
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float function_scope(float a) {
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#pragma float_control(precise, on) junk // expected-warning {{extra tokens at end of '#pragma float_control' - ignored}}
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return a;
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}
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// Ok, at namespace scope.
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namespace foo {
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#pragma float_control(push)
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#pragma float_control(pop)
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}
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// Ok, within a language linkage specification.
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extern "C" {
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#pragma float_control(push)
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#pragma float_control(pop)
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}
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// Same.
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extern "C++" {
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#pragma float_control(push)
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#pragma float_control(pop)
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}
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#ifdef CHECK_ERROR
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// Ok at file scope.
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#pragma float_control(push)
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#pragma float_control(pop)
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#pragma float_control(precise, on, push)
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void check_stack() {
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// Not okay within a function declaration.
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#pragma float_control(push) // expected-error {{can only appear at file or namespace scope or within a language linkage specification}}
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#pragma float_control(pop) // expected-error {{can only appear at file or namespace scope or within a language linkage specification}}
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#pragma float_control(precise, on, push) // expected-error {{can only appear at file or namespace scope or within a language linkage specification}}
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#pragma float_control(except, on, push) // expected-error {{can only appear at file or namespace scope or within a language linkage specification}}
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#pragma float_control(except, on, push, junk) // expected-error {{float_control is malformed}}
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return;
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}
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#endif
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -fdenormal-fp-math=preserve-sign,preserve-sign -fsyntax-only %s -DDEFAULT -verify
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsyntax-only %s -ffp-contract=fast -DPRECISE -verify
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsyntax-only %s -ffp-contract=off -frounding-math -ffp-exception-behavior=strict -DSTRICT -verify
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// RUN: %clang_cc1 -triple x86_64-linux-gnu -menable-no-infs -menable-no-nans -funsafe-math-optimizations -fno-signed-zeros -mreassociate -freciprocal-math -ffp-contract=fast -ffast-math -ffinite-math-only -fsyntax-only %s -DFAST -verify
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double a = 0.0;
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double b = 1.0;
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#ifdef STRICT
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#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
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#else
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#ifndef FAST
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#pragma STDC FENV_ACCESS ON
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#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
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#endif
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#endif
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#pragma float_control(precise, on)
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#pragma float_control(except, on) // OK
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#ifndef STRICT
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#pragma float_control(except, on)
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#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
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#endif
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int main() {
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#ifdef STRICT
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#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
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#else
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#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
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#endif
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#pragma float_control(except, on)
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// error: '#pragma float_control(except, on)' is illegal when precise is disabled
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double x = b / a; // only used for fp flag setting
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if (a == a) // only used for fp flag setting
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return 0; //(int)x;
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}
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