186bea3750
MSVC's pragma optimize turns optimizations on or off based on the list
passed. At the moment, we only support an empty optimization list.
i.e. `#pragma optimize("", on | off)`
From MSVC's docs:
| Parameter | Type of optimization |
|-----------|--------------------------------------------------|
| g | Enable global optimizations. Deprecated |
| s or t | Specify short or fast sequences of machine code |
| y | Generate frame pointers on the program stack |
https://docs.microsoft.com/en-us/cpp/preprocessor/optimize?view=msvc-170
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D125723
21 lines
550 B
C
21 lines
550 B
C
// RUN: %clang_cc1 -O2 -emit-llvm -fms-extensions -o - %s | FileCheck %s
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#pragma optimize("", off)
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// CHECK: define{{.*}} void @f0(){{.*}} #[[OPTNONE:[0-9]+]]
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void f0() {}
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// CHECK: define{{.*}} void @f1(){{.*}} #[[OPTNONE]]
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void f1() {}
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#pragma optimize("", on)
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// CHECK: define{{.*}} void @f2(){{.*}} #[[NO_OPTNONE:[0-9]+]]
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void f2() {}
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// CHECK: define{{.*}} void @f3(){{.*}} #[[NO_OPTNONE]]
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void f3() {}
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// CHECK: attributes #[[OPTNONE]] = {{{.*}}optnone{{.*}}}
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// CHECK-NOT: attributes #[[NO_OPTNONE]] = {{{.*}}optnone{{.*}}}
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