[llvm] [SPIRV] Added support for the constrained arithmetic intrinsic (PR #157441)

[Matt Arsenault via llvm-commits]

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@@ -32,6 +35,7 @@ entry:
   %r4 = tail call float @llvm.experimental.constrained.fmul.f32(float %a, float %a, metadata !"round.downward", metadata !"fpexcept.strict")
   %r5 = tail call float @llvm.experimental.constrained.fma.f32(float %a, float %a, float %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
   %r6 = tail call float @llvm.experimental.constrained.frem.f32(float %a, float %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
+  %r7 = tail call float @llvm.experimental.constrained.fmuladd.f32(float %a, float %a, float %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
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arsenm wrote:

This style of test is annoying to maintain, have one case per function. Also test more types, like vectors 

https://github.com/llvm/llvm-project/pull/157441