[HLSL] Add clang builtin for HLSL.
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Authored by python3kgae on May 2 2022, 4:28 PM.

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beanz
pow2clk
skc7
yaxunl
sameerds

Summary

Two directx specific clang builtins are introduced:

unsigned builtin_dx_umax_i3232(unsigned, unsigned);
unsigned builtin_dx_umin_i3232(unsigned, unsigned);

They're for https://github.com/Microsoft/DirectXShaderCompiler/blob/master/docs/DXIL.rst#umax and
https://github.com/Microsoft/DirectXShaderCompiler/blob/master/docs/DXIL.rst#umini.

These 2 builtins are translated into llvm umax/umin intrinsic in clang codeGen.

Diff Detail

Repository: rG LLVM Github Monorepo

Unit TestsFailed
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	Time	Test
	110 ms	x64 debian > Clang.CodeGen::debug-info-block-vars.c Script: -- : 'RUN: at line 1'; /var/lib/buildkite-agent/builds/llvm-project/build/bin/clang -cc1 -internal-isystem /var/lib/buildkite-agent/builds/llvm-project/build/lib/clang/15.0.0/include -nostdsysteminc -no-opaque-pointers -x c -std=c89 -fblocks -debug-info-kind=standalone -emit-llvm -O0 -triple x86_64-apple-darwin -o - /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGen/debug-info-block-vars.c \| /var/lib/buildkite-agent/builds/llvm-project/build/bin/FileCheck /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGen/debug-info-block-vars.c
	40 ms	x64 debian > Clang.CodeGenHLSL::umax_umin.hlsl Script: -- : 'RUN: at line 1'; /var/lib/buildkite-agent/builds/llvm-project/build/bin/clang --driver-mode=dxc -Tlib_6_7 -Fo - /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGenHLSL/umax_umin.hlsl \| /var/lib/buildkite-agent/builds/llvm-project/build/bin/FileCheck /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGenHLSL/umax_umin.hlsl
	90 ms	x64 debian > Clang.CodeGenObjCXX::nrvo.mm Script: -- : 'RUN: at line 1'; /var/lib/buildkite-agent/builds/llvm-project/build/bin/clang -cc1 -internal-isystem /var/lib/buildkite-agent/builds/llvm-project/build/lib/clang/15.0.0/include -nostdsysteminc -emit-llvm -o - -fblocks /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGenObjCXX/nrvo.mm -O1 -fno-inline-functions -triple x86_64-apple-darwin10.0.0 -fobjc-runtime=macosx-fragile-10.5 \| /var/lib/buildkite-agent/builds/llvm-project/build/bin/FileCheck /var/lib/buildkite-agent/builds/llvm-project/clang/test/CodeGenObjCXX/nrvo.mm