24 lines
541 B
C
24 lines
541 B
C
// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
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void foo(int x)
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{
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_Atomic(int) i = 0;
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_Atomic(short) j = 0;
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// Check that multiply / divides on atomics produce a cmpxchg loop
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i *= 2;
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// CHECK: mul nsw i32
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// CHECK: cmpxchg i32*
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i /= 2;
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// CHECK: sdiv i32
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// CHECK: cmpxchg i32*
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j /= x;
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// CHECK: sdiv i32
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// CHECK: cmpxchg i16*
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// These should be emitting atomicrmw instructions, but they aren't yet
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i += 2; // CHECK: cmpxchg
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i -= 2; // CHECK: cmpxchg
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i++; // CHECK: cmpxchg
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i--; // CHECK: cmpxchg
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}
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