Revert "Do materialize for floating point"

1) The commit was made despite profound lack of understanding:

   "I did not understand the comment about using dyn_cast instead of isa. I will
   commit as is and make the update after. You can explain what you meant to me."

   Commit first, understand later isn't OK.

2) Review comments were simply ignored:

   "Can you edit the summary to describe what the patch is for? It appears to be
   a list of commits at the moment."

3) The patch got LGTM'd off-list without any indication of readiness.

4) The public mailing list was excluded from patch review so all of this was
   hidden from the community.

This reverts commit r210414.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210424 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/Mips/Fast-ISel/simplestorefp1.ll

@@ -1,39 +0,0 @@
-; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \
-; RUN:     < %s | FileCheck %s
-
-@f = common global float 0.000000e+00, align 4
-@de = common global double 0.000000e+00, align 8
-
-; Function Attrs: nounwind
-define void @f1() #0 {
-entry:
-  store float 0x3FFA76C8C0000000, float* @f, align 4
-  ret void
-; CHECK:	.ent	f1
-; CHECK:	lui	$[[REG1:[0-9]+]], 16339
-; CHECK:	ori	$[[REG2:[0-9]+]], $[[REG1]], 46662
-; CHECK:	mtc1	$[[REG2]], $f[[REG3:[0-9]+]]
-; CHECK:	lw	$[[REG4:[0-9]+]], %got(f)(${{[0-9]+}})
-; CHECK:	swc1	$f[[REG3]], 0($[[REG4]])
-; CHECK: 	.end	f1
-
-}
-
-; Function Attrs: nounwind
-define void @d1() #0 {
-entry:
-  store double 1.234567e+00, double* @de, align 8
-; CHECK:	.ent	d1
-; CHECK:	lui	$[[REG1a:[0-9]+]], 16371
-; CHECK:	ori	$[[REG2a:[0-9]+]], $[[REG1a]], 49353
-; CHECK:	lui	$[[REG1b:[0-9]+]], 21403
-; CHECK:	ori	$[[REG2b:[0-9]+]], $[[REG1b]], 34951
-; CHECK:	mtc1	$[[REG2b]], $f[[REG3b:[0-9]+]]
-; CHECK:	mtc1	$[[REG2a]], $f[[REG3a:[0-9]+]]
-; CHECK:	sdc1	$f[[REG3b]], 0(${{[0-9]+}})
-; CHECK:	.end	d1
-  ret void
-}
-
-attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-