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; RUN: llc < %s -mtriple=arm64-eabi -enable-no-nans-fp-math | FileCheck %s
define double @test_direct(float %in) {
; CHECK-LABEL: test_direct:
%cmp = fcmp nnan olt float %in, 0.000000e+00
%val = select i1 %cmp, float 0.000000e+00, float %in
%longer = fpext float %val to double
ret double %longer
; CHECK: fmax
}
define double @test_cross(float %in) {
; CHECK-LABEL: test_cross:
%cmp = fcmp nnan ult float %in, 0.000000e+00
%val = select i1 %cmp, float %in, float 0.000000e+00
%longer = fpext float %val to double
ret double %longer
; CHECK: fmin
}
; Same as previous, but with ordered comparison;
; can't be converted in safe-math mode.
define double @test_cross_fail_nan(float %in) {
; CHECK-LABEL: test_cross_fail_nan:
%cmp = fcmp nnan olt float %in, 0.000000e+00
%val = select i1 %cmp, float %in, float 0.000000e+00
%longer = fpext float %val to double
ret double %longer
; CHECK: fmin
}
; This isn't a min or a max, but passes the first condition for swapping the
; results. Make sure they're put back before we resort to the normal fcsel.
define float @test_cross_fail(float %lhs, float %rhs) {
; CHECK-LABEL: test_cross_fail:
%tst = fcmp nnan une float %lhs, %rhs
%res = select i1 %tst, float %rhs, float %lhs
ret float %res
; The register allocator would have to decide to be deliberately obtuse before
; other register were used.
; CHECK: fcsel s0, s1, s0, ne
}
; Make sure the transformation isn't triggered for integers
define i64 @test_integer(i64 %in) {
%cmp = icmp slt i64 %in, 0
%val = select i1 %cmp, i64 0, i64 %in
ret i64 %val
}
define float @test_f16(half %in) {
; CHECK-LABEL: test_f16:
%cmp = fcmp nnan ult half %in, 0.000000e+00
%val = select i1 %cmp, half %in, half 0.000000e+00
%longer = fpext half %val to float
ret float %longer
; FIXME: It'd be nice for this to create an fmin instruction!
; CHECK: fcvt
; CHECK: fcsel
}
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