[llvm] [DAGCombiner] Remove all `UnsafeFPMath` references (PR #146295)

[Simon Pilgrim via llvm-commits]

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@@ -1672,9 +1672,9 @@ define <4 x float> @test_v4f32_fma_x_c1_fmul_x_c2(<4 x float> %x) #0 {
 ; AVX512:       # %bb.0:
 ; AVX512-NEXT:    vmulps {{\.?LCPI[0-9]+_[0-9]+}}(%rip){1to4}, %xmm0, %xmm0
 ; AVX512-NEXT:    retq
-  %m0 = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
-  %m1 = fmul <4 x float> %x, <float 4.0, float 3.0, float 2.0, float 1.0>
-  %a  = fadd <4 x float> %m0, %m1
+  %m0 = fmul contract reassoc <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
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RKSimon wrote:

remove the #0 attribute from the all these tests?

https://github.com/llvm/llvm-project/pull/146295