ValueTracking: Add baseline tests for computeKnownFPClass fdiv handling

diff --git a/llvm/test/Transforms/Attributor/nofpclass-fdiv.ll b/llvm/test/Transforms/Attributor/nofpclass-fdiv.ll
new file mode 100644 (file)
index 0000000..8a31181
--- /dev/null
+++ b/llvm/test/Transforms/Attributor/nofpclass-fdiv.ll
@@ -0,0 +1,473 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
+
+define float @ret_fdiv_ieee(float %arg0, float %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee
+; CHECK-SAME: (float [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz(float %arg0, float %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz
+; CHECK-SAME: (float [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR1:[0-9]+]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_noinf_nozero__all(float nofpclass(inf zero) %arg0, float %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_noinf_nozero__all
+; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_nozero__all(float nofpclass(nan inf zero) %arg0, float %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_nozero__all
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_all__nonan_noinf_nozero(float %arg0, float nofpclass(nan inf zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_all__nonan_noinf_nozero
+; CHECK-SAME: (float [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan(float nofpclass(nan inf zero) %arg0, float nofpclass(nan) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan__nonan_noinf_nozero(float nofpclass(nan) %arg0, float nofpclass(nan inf zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_nozero__nonan_noinf(float nofpclass(nan zero) %arg0, float nofpclass(nan inf) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_nozero__nonan_noinf
+; CHECK-SAME: (float nofpclass(nan zero) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf__nonan_nozero(float nofpclass(nan inf) %arg0, float nofpclass(nan zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf__nonan_nozero
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_nonan_nozero__nonan_noinf(float nofpclass(nan zero) %arg0, float nofpclass(nan inf) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_nozero__nonan_noinf
+; CHECK-SAME: (float nofpclass(nan zero) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_nonan_noinf__nonan_nozero(float nofpclass(nan inf) %arg0, float nofpclass(nan zero) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf__nonan_nozero
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan zero) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_nonan_nozero_nosub__nonan_noinf(float nofpclass(nan zero sub) %arg0, float nofpclass(nan inf) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_nozero_nosub__nonan_noinf
+; CHECK-SAME: (float nofpclass(nan zero sub) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_nonan_noinf__nonan_nozero_nosub(float nofpclass(nan inf) %arg0, float nofpclass(nan zero sub) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf__nonan_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan zero sub) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf__nonan_noinf(float nofpclass(nan) %arg0, float nofpclass(nan) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf__nonan_noinf
+; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]], float nofpclass(nan) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_nonan_noinf_nozero__nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf zero) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf_nozero__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_dapz_nonan_noinf_nozero__nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf zero) %arg1) #2 {
+; CHECK-LABEL: define float @ret_fdiv_dapz_nonan_noinf_nozero__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR2:[0-9]+]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_dynamic_nonan_noinf_nozero__nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf zero) %arg1) #3 {
+; CHECK-LABEL: define float @ret_fdiv_dynamic_nonan_noinf_nozero__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR3:[0-9]+]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_noinf(float nofpclass(nan inf) %arg0, float nofpclass(nan inf) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_noinf
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan_noinf_noinf(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_nozero__nonan_noinf_noinf
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_nozero(float nofpclass(nan inf) %arg0, float nofpclass(nan inf zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_noposzero(float nofpclass(nan inf) %arg0, float nofpclass(nan pzero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_noinf__nonan_noinf_noposzero
+; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]], float nofpclass(nan pzero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_noposzero__nonan_noinf_noinf(float nofpclass(nan pzero) %arg0, float nofpclass(nan inf) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_noposzero__nonan_noinf_noinf
+; CHECK-SAME: (float nofpclass(nan pzero) [[ARG0:%.*]], float nofpclass(nan inf) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub(float nofpclass(nan inf zero sub) %arg0, float nofpclass(nan inf zero sub) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf zero sub) [[ARG0:%.*]], float nofpclass(nan inf zero sub) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+; Denormal mode doesn't matter because sources are nofpclass(sub)
+define float @ret_fdiv_daz_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub(float nofpclass(nan inf zero sub) %arg0, float nofpclass(nan inf zero sub) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf zero sub) [[ARG0:%.*]], float nofpclass(nan inf zero sub) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_dapz_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub(float nofpclass(nan inf zero sub) %arg0, float nofpclass(nan inf zero sub) %arg1) #2 {
+; CHECK-LABEL: define float @ret_fdiv_dapz_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf zero sub) [[ARG0:%.*]], float nofpclass(nan inf zero sub) [[ARG1:%.*]]) #[[ATTR2]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_dynamic_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub(float nofpclass(nan inf zero sub) %arg0, float nofpclass(nan inf zero sub) %arg1) #3 {
+; CHECK-LABEL: define float @ret_fdiv_dynamic_nonan_noinf_nozero_nosub__nonan_noinf_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf zero sub) [[ARG0:%.*]], float nofpclass(nan inf zero sub) [[ARG1:%.*]]) #[[ATTR3]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+; Missing no-subnormal on lhs
+define float @ret_fdiv_daz_nonan_noinf_nozero__nonan_noinf_nozero_nosub(float nofpclass(nan inf zero) %arg0, float nofpclass(nan inf zero sub) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf_nozero__nonan_noinf_nozero_nosub
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]], float nofpclass(nan inf zero sub) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+; Missing no-subnormal on lhs
+define float @ret_fdiv_daz_nonan_noinf_nozero_nosub__nonan_noinf_nozero(float nofpclass(nan inf zero sub) %arg0, float nofpclass(nan inf zero) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_nonan_noinf_nozero_nosub__nonan_noinf_nozero
+; CHECK-SAME: (float nofpclass(nan inf zero sub) [[ARG0:%.*]], float nofpclass(nan inf zero) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+; should be able to infer noinf
+define float @ret_fdiv_ieee_noinf__nozero(float nofpclass(inf) %arg0, float nofpclass(zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_noinf__nozero
+; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]], float nofpclass(zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_all__nozero(float %arg0, float nofpclass(zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_all__nozero
+; CHECK-SAME: (float [[ARG0:%.*]], float nofpclass(zero) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_noinf__all(float nofpclass(inf) %arg0, float %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_noinf__all
+; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_ieee_nozero__noinf(float nofpclass(zero) %arg0, float nofpclass(inf) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_ieee_nozero__noinf
+; CHECK-SAME: (float nofpclass(zero) [[ARG0:%.*]], float nofpclass(inf) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_noinf__nozero(float nofpclass(inf) %arg0, float nofpclass(zero) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_noinf__nozero
+; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]], float nofpclass(zero) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_daz_noinf__nozero_nosub(float nofpclass(inf) %arg0, float nofpclass(zero sub) %arg1) #1 {
+; CHECK-LABEL: define float @ret_fdiv_daz_noinf__nozero_nosub
+; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]], float nofpclass(zero sub) [[ARG1:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_same_operands(float %arg) #0 {
+; CHECK-LABEL: define float @ret_fdiv_same_operands
+; CHECK-SAME: (float [[ARG:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG]], [[ARG]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg, %arg
+  ret float %fdiv
+}
+
+define float @ret_fdiv_same_operands_nosnan(float nofpclass(snan) %arg) #0 {
+; CHECK-LABEL: define float @ret_fdiv_same_operands_nosnan
+; CHECK-SAME: (float nofpclass(snan) [[ARG:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG]], [[ARG]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg, %arg
+  ret float %fdiv
+}
+
+define float @ret_fdiv_same_operands_noqnan(float nofpclass(qnan) %arg) #0 {
+; CHECK-LABEL: define float @ret_fdiv_same_operands_noqnan
+; CHECK-SAME: (float nofpclass(qnan) [[ARG:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG]], [[ARG]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg, %arg
+  ret float %fdiv
+}
+
+define float @ret_fdiv_same_operands_nonan(float nofpclass(nan) %arg) #0 {
+; CHECK-LABEL: define float @ret_fdiv_same_operands_nonan
+; CHECK-SAME: (float nofpclass(nan) [[ARG:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG]], [[ARG]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg, %arg
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_lhs(float nofpclass(ninf nsub nnorm) %arg0, float %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_lhs
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], float [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_rhs(float %arg0, float nofpclass(ninf nsub nnorm) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_rhs
+; CHECK-SAME: (float [[ARG0:%.*]], float nofpclass(ninf nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_nzero_rhs(float %arg0, float nofpclass(ninf nsub nnorm nzero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_nzero_rhs
+; CHECK-SAME: (float [[ARG0:%.*]], float nofpclass(ninf nzero nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg(float nofpclass(ninf nsub nnorm) %arg0, float nofpclass(ninf nsub nnorm) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], float nofpclass(ninf nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_nzero(float nofpclass(ninf nsub nnorm nzero) %arg0, float nofpclass(ninf nsub nnorm nzero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_nzero
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], float nofpclass(ninf nzero nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_rhs_no_nzero(float nofpclass(ninf nsub nnorm) %arg0, float nofpclass(ninf nsub nnorm nzero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_rhs_no_nzero
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]], float nofpclass(ninf nzero nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+define float @ret_fdiv_no_neg_no_zero_rhs(float nofpclass(ninf nsub nnorm nzero) %arg0, float nofpclass(ninf nsub nnorm zero) %arg1) #0 {
+; CHECK-LABEL: define float @ret_fdiv_no_neg_no_zero_rhs
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]], float nofpclass(ninf zero nsub nnorm) [[ARG1:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:    [[FDIV:%.*]] = fdiv float [[ARG0]], [[ARG1]]
+; CHECK-NEXT:    ret float [[FDIV]]
+;
+  %fdiv = fdiv float %arg0, %arg1
+  ret float %fdiv
+}
+
+attributes #0 = { "denormal-fp-math"="ieee,ieee" }
+attributes #1 = { "denormal-fp-math"="ieee,preserve-sign" }
+attributes #2 = { "denormal-fp-math"="ieee,positive-zero" }
+attributes #3 = { "denormal-fp-math"="ieee,dynamic" }
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; TUNIT: {{.*}}