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# 47fb21d2 23-Jun-2020 Zhi Zhuang <[email protected]>

fix test failure for clang/test/CodeGen/builtin-expect-with-probability.cpp

Fix test case added by D79830
Rewrite the test case, which did similar thing as builtin-expect.c
does(test generated llvm

fix test failure for clang/test/CodeGen/builtin-expect-with-probability.cpp

Fix test case added by D79830
Rewrite the test case, which did similar thing as builtin-expect.c
does(test generated llvm intrinsic instead of test branch weights).
Currently pass by "-disable-llvm-passes" option.

Differential Revision: https://reviews.llvm.org/D82403

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# 79ceda2e 23-Jun-2020 Erich Keane <[email protected]>

Fix test added by D79830

This clang test unfortunately depends on the actions of the optimizer,
which some of the buildbots hit.

This patch makes it so it cannot ignore the return value of 'f', so

Fix test added by D79830

This clang test unfortunately depends on the actions of the optimizer,
which some of the buildbots hit.

This patch makes it so it cannot ignore the return value of 'f', so it
won't do away with the implementation.

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# 37fb8603 22-Jun-2020 Zhi Zhuang <[email protected]>

Add support of __builtin_expect_with_probability

Add a new builtin-function __builtin_expect_with_probability and
intrinsic llvm.expect.with.probability.
The interface is __builtin_expect_with_proba

Add support of __builtin_expect_with_probability

Add a new builtin-function __builtin_expect_with_probability and
intrinsic llvm.expect.with.probability.
The interface is __builtin_expect_with_probability(long expr, long
expected, double probability).
It is mainly the same as __builtin_expect besides one more argument
indicating the probability of expression equal to expected value. The
probability should be a constant floating-point expression and be in
range [0.0, 1.0] inclusive.
It is similar to builtin-expect-with-probability function in GCC
built-in functions.

Differential Revision: https://reviews.llvm.org/D79830

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