[llvm] SelectionDAG: Support nofpclass (PR #108350)

[Matt Arsenault via llvm-commits]

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@@ -127,6 +402,53 @@ define double @minimumnum_double_nnan(double %x, double %y) {
 ; MIPS32R6:       # %bb.0:
 ; MIPS32R6-NEXT:    jr $ra
 ; MIPS32R6-NEXT:    min.d $f0, $f12, $f14
+;
+; MIPS64-LABEL: minimumnum_double_nnan:
+; MIPS64:       # %bb.0:
+; MIPS64-NEXT:    c.olt.d $f12, $f13
+; MIPS64-NEXT:    mov.d $f0, $f13
+; MIPS64-NEXT:    movt.d $f0, $f12, $fcc0
+; MIPS64-NEXT:    daddiu $1, $zero, 1
+; MIPS64-NEXT:    dsll $1, $1, 63
+; MIPS64-NEXT:    dmfc1 $2, $f12
+; MIPS64-NEXT:    xor $2, $2, $1
+; MIPS64-NEXT:    mov.d $f1, $f0
+; MIPS64-NEXT:    movz.d $f1, $f12, $2
+; MIPS64-NEXT:    dmfc1 $2, $f13
+; MIPS64-NEXT:    xor $1, $2, $1
+; MIPS64-NEXT:    movz.d $f1, $f13, $1
+; MIPS64-NEXT:    dmtc1 $zero, $f2
+; MIPS64-NEXT:    c.eq.d $f0, $f2
+; MIPS64-NEXT:    jr $ra
+; MIPS64-NEXT:    movt.d $f0, $f1, $fcc0
+  %z = call nnan double @llvm.minimumnum.f64(double %x, double %y)
+  ret double %z
+}
+
+define double @minimumnum_double_nnan_arg(double nofpclass(nan) %x, double nofpclass(nan) %y) {
+; MIPS32R6-LABEL: minimumnum_double_nnan_arg:
+; MIPS32R6:       # %bb.0:
+; MIPS32R6-NEXT:    jr $ra
+; MIPS32R6-NEXT:    min.d $f0, $f12, $f14
+;
+; MIPS64-LABEL: minimumnum_double_nnan_arg:
+; MIPS64:       # %bb.0:
+; MIPS64-NEXT:    c.olt.d $f12, $f13
+; MIPS64-NEXT:    mov.d $f0, $f13
+; MIPS64-NEXT:    movt.d $f0, $f12, $fcc0
+; MIPS64-NEXT:    daddiu $1, $zero, 1
+; MIPS64-NEXT:    dsll $1, $1, 63
+; MIPS64-NEXT:    dmfc1 $2, $f12
+; MIPS64-NEXT:    xor $2, $2, $1
+; MIPS64-NEXT:    mov.d $f1, $f0
+; MIPS64-NEXT:    movz.d $f1, $f12, $2
+; MIPS64-NEXT:    dmfc1 $2, $f13
+; MIPS64-NEXT:    xor $1, $2, $1
+; MIPS64-NEXT:    movz.d $f1, $f13, $1
+; MIPS64-NEXT:    dmtc1 $zero, $f2
+; MIPS64-NEXT:    c.eq.d $f0, $f2
+; MIPS64-NEXT:    jr $ra
+; MIPS64-NEXT:    movt.d $f0, $f1, $fcc0
   %z = call nnan double @llvm.minimumnum.f64(double %x, double %y)
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arsenm wrote:

If the intent of the test is to check the effect of the nofpclass attribute, the nnan flag will hide it 

https://github.com/llvm/llvm-project/pull/108350