1 ; RUN: llc < %s -mtriple=arm64-eabi -enable-no-nans-fp-math | FileCheck %s
3 define double @test_direct(float %in) {
4 ; CHECK-LABEL: test_direct:
5 %cmp = fcmp nnan olt float %in, 0.000000e+00
6 %val = select i1 %cmp, float 0.000000e+00, float %in
7 %longer = fpext float %val to double
13 define double @test_cross(float %in) {
14 ; CHECK-LABEL: test_cross:
15 %cmp = fcmp nnan ult float %in, 0.000000e+00
16 %val = select i1 %cmp, float %in, float 0.000000e+00
17 %longer = fpext float %val to double
23 ; Same as previous, but with ordered comparison;
24 ; can't be converted in safe-math mode.
25 define double @test_cross_fail_nan(float %in) {
26 ; CHECK-LABEL: test_cross_fail_nan:
27 %cmp = fcmp nnan olt float %in, 0.000000e+00
28 %val = select i1 %cmp, float %in, float 0.000000e+00
29 %longer = fpext float %val to double
35 ; This isn't a min or a max, but passes the first condition for swapping the
36 ; results. Make sure they're put back before we resort to the normal fcsel.
37 define float @test_cross_fail(float %lhs, float %rhs) {
38 ; CHECK-LABEL: test_cross_fail:
39 %tst = fcmp nnan une float %lhs, %rhs
40 %res = select i1 %tst, float %rhs, float %lhs
43 ; The register allocator would have to decide to be deliberately obtuse before
44 ; other register were used.
45 ; CHECK: fcsel s0, s1, s0, ne
48 ; Make sure the transformation isn't triggered for integers
49 define i64 @test_integer(i64 %in) {
50 %cmp = icmp slt i64 %in, 0
51 %val = select i1 %cmp, i64 0, i64 %in
55 define float @test_f16(half %in) {
56 ; CHECK-LABEL: test_f16:
57 %cmp = fcmp nnan ult half %in, 0.000000e+00
58 %val = select i1 %cmp, half %in, half 0.000000e+00
59 %longer = fpext half %val to float
61 ; FIXME: It'd be nice for this to create an fmin instruction!