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llvm-project/llvm/test/CodeGen/WebAssembly/f64.ll
valadaptive cdc6a84c14 TargetLowering: Allow FMINNUM/FMAXNUM to lower to FMINIMUM/FMAXIMUM even without nsz (#177828) 
This restriction was originally added in
https://reviews.llvm.org/D143256, with the given justification:

> Currently, in TargetLowering, if the target does not support fminnum,
we lower to fminimum if neither operand could be a NaN. But this isn't
quite correct because fminnum and fminimum treat +/-0 differently; so,
we need to prove that one of the operands isn't a zero.

As far as I can tell, this was never correct. Before
https://github.com/llvm/llvm-project/pull/172012, `minnum` and `maxnum`
were nondeterministic with regards to signed zero, so it's always been
perfectly legal to lower them to operations that order signed zeroes.
2026-01-25 18:24:12 -05:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck %s
; Test that basic 64-bit floating-point operations assemble as expected.
target triple = "wasm32-unknown-unknown"
declare double @llvm.fabs.f64(double)
declare double @llvm.copysign.f64(double, double)
declare double @llvm.sqrt.f64(double)
declare double @llvm.ceil.f64(double)
declare double @llvm.floor.f64(double)
declare double @llvm.trunc.f64(double)
declare double @llvm.nearbyint.f64(double)
declare double @llvm.rint.f64(double)
declare double @llvm.roundeven.f64(double)
declare double @llvm.fma.f64(double, double, double)
define double @fadd64(double %x, double %y) {
; CHECK-LABEL: fadd64:
; CHECK: .functype fadd64 (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.add $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = fadd double %x, %y
ret double %a
}
define double @fsub64(double %x, double %y) {
; CHECK-LABEL: fsub64:
; CHECK: .functype fsub64 (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.sub $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = fsub double %x, %y
ret double %a
}
define double @fmul64(double %x, double %y) {
; CHECK-LABEL: fmul64:
; CHECK: .functype fmul64 (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.mul $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = fmul double %x, %y
ret double %a
}
define double @fdiv64(double %x, double %y) {
; CHECK-LABEL: fdiv64:
; CHECK: .functype fdiv64 (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.div $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = fdiv double %x, %y
ret double %a
}
define double @fabs64(double %x) {
; CHECK-LABEL: fabs64:
; CHECK: .functype fabs64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.abs $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.fabs.f64(double %x)
ret double %a
}
define double @fneg64(double %x) {
; CHECK-LABEL: fneg64:
; CHECK: .functype fneg64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.neg $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = fsub double -0., %x
ret double %a
}
define double @copysign64(double %x, double %y) {
; CHECK-LABEL: copysign64:
; CHECK: .functype copysign64 (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.copysign $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.copysign.f64(double %x, double %y)
ret double %a
}
define double @sqrt64(double %x) {
; CHECK-LABEL: sqrt64:
; CHECK: .functype sqrt64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.sqrt $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.sqrt.f64(double %x)
ret double %a
}
define double @ceil64(double %x) {
; CHECK-LABEL: ceil64:
; CHECK: .functype ceil64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.ceil $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.ceil.f64(double %x)
ret double %a
}
define double @floor64(double %x) {
; CHECK-LABEL: floor64:
; CHECK: .functype floor64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.floor $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.floor.f64(double %x)
ret double %a
}
define double @trunc64(double %x) {
; CHECK-LABEL: trunc64:
; CHECK: .functype trunc64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.trunc $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.trunc.f64(double %x)
ret double %a
}
define double @nearest64(double %x) {
; CHECK-LABEL: nearest64:
; CHECK: .functype nearest64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.nearest $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.nearbyint.f64(double %x)
ret double %a
}
define double @nearest64_via_rint(double %x) {
; CHECK-LABEL: nearest64_via_rint:
; CHECK: .functype nearest64_via_rint (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.nearest $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.rint.f64(double %x)
ret double %a
}
define double @nearest64_via_roundeven(double %x) {
; CHECK-LABEL: nearest64_via_roundeven:
; CHECK: .functype nearest64_via_roundeven (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push1=, 0
; CHECK-NEXT: f64.nearest $push0=, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.roundeven.f64(double %x)
ret double %a
}
; This is not "minimum" because a -0.0 input returns +0.0.
define double @fmin64(double %x) {
; CHECK-LABEL: fmin64:
; CHECK: .functype fmin64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: f64.const $push0=, 0x0p0
; CHECK-NEXT: local.get $push5=, 0
; CHECK-NEXT: local.get $push4=, 0
; CHECK-NEXT: f64.const $push3=, 0x0p0
; CHECK-NEXT: f64.ge $push1=, $pop4, $pop3
; CHECK-NEXT: f64.select $push2=, $pop0, $pop5, $pop1
; CHECK-NEXT: return $pop2
%a = fcmp ult double %x, 0.0
%b = select i1 %a, double %x, double 0.0
ret double %b
}
; This is not "maximum" because a -0.0 input returns +0.0.
define double @fmax64(double %x) {
; CHECK-LABEL: fmax64:
; CHECK: .functype fmax64 (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: f64.const $push0=, 0x0p0
; CHECK-NEXT: local.get $push5=, 0
; CHECK-NEXT: local.get $push4=, 0
; CHECK-NEXT: f64.const $push3=, 0x0p0
; CHECK-NEXT: f64.le $push1=, $pop4, $pop3
; CHECK-NEXT: f64.select $push2=, $pop0, $pop5, $pop1
; CHECK-NEXT: return $pop2
%a = fcmp ugt double %x, 0.0
%b = select i1 %a, double %x, double 0.0
ret double %b
}
declare double @llvm.minimum.f64(double, double)
define double @fmin64_intrinsic(double %x, double %y) {
; CHECK-LABEL: fmin64_intrinsic:
; CHECK: .functype fmin64_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.min $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.minimum.f64(double %x, double %y)
ret double %a
}
declare double @llvm.minnum.f64(double, double)
define double @fminnum64_intrinsic(double %x, double %y) {
; CHECK-LABEL: fminnum64_intrinsic:
; CHECK: .functype fminnum64_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.min $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call nnan double @llvm.minnum.f64(double %x, double %y)
ret double %a
}
define double @fminnum64_nsz_intrinsic(double %x, double %y) {
; CHECK-LABEL: fminnum64_nsz_intrinsic:
; CHECK: .functype fminnum64_nsz_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.min $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call nnan nsz double @llvm.minnum.f64(double %x, double %y)
ret double %a
}
define double @fminnum64_zero_intrinsic(double %x) {
; CHECK-LABEL: fminnum64_zero_intrinsic:
; CHECK: .functype fminnum64_zero_intrinsic (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: f64.const $push0=, -0x0p0
; CHECK-NEXT: f64.min $push1=, $pop2, $pop0
; CHECK-NEXT: return $pop1
%a = call nnan double @llvm.minnum.f64(double %x, double -0.0)
ret double %a
}
define double @fminnum64_non_zero_intrinsic(double %x) {
; CHECK-LABEL: fminnum64_non_zero_intrinsic:
; CHECK: .functype fminnum64_non_zero_intrinsic (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: f64.const $push0=, -0x1p0
; CHECK-NEXT: f64.min $push1=, $pop2, $pop0
; CHECK-NEXT: return $pop1
%a = call nnan double @llvm.minnum.f64(double %x, double -1.0)
ret double %a
}
declare double @llvm.maximum.f64(double, double)
define double @fmax64_intrinsic(double %x, double %y) {
; CHECK-LABEL: fmax64_intrinsic:
; CHECK: .functype fmax64_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.max $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call double @llvm.maximum.f64(double %x, double %y)
ret double %a
}
declare double @llvm.maxnum.f64(double, double)
define double@fmaxnum64_intrinsic(double %x, double %y) {
; CHECK-LABEL: fmaxnum64_intrinsic:
; CHECK: .functype fmaxnum64_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.max $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call nnan double @llvm.maxnum.f64(double %x, double %y)
ret double %a
}
define double@fmaxnum64_nsz_intrinsic(double %x, double %y) {
; CHECK-LABEL: fmaxnum64_nsz_intrinsic:
; CHECK: .functype fmaxnum64_nsz_intrinsic (f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: local.get $push1=, 1
; CHECK-NEXT: f64.max $push0=, $pop2, $pop1
; CHECK-NEXT: return $pop0
%a = call nnan nsz double @llvm.maxnum.f64(double %x, double %y)
ret double %a
}
define double @fmaxnum64_zero_intrinsic(double %x) {
; CHECK-LABEL: fmaxnum64_zero_intrinsic:
; CHECK: .functype fmaxnum64_zero_intrinsic (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: f64.const $push0=, 0x0p0
; CHECK-NEXT: f64.max $push1=, $pop2, $pop0
; CHECK-NEXT: return $pop1
%a = call nnan double @llvm.maxnum.f64(double %x, double 0.0)
ret double %a
}
define double @fmaxnum64_non_zero_intrinsic(double %x) {
; CHECK-LABEL: fmaxnum64_non_zero_intrinsic:
; CHECK: .functype fmaxnum64_non_zero_intrinsic (f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push2=, 0
; CHECK-NEXT: f64.const $push0=, 0x1p0
; CHECK-NEXT: f64.max $push1=, $pop2, $pop0
; CHECK-NEXT: return $pop1
%a = call nnan double @llvm.maxnum.f64(double %x, double 1.0)
ret double %a
}
define double @fma64(double %a, double %b, double %c) {
; CHECK-LABEL: fma64:
; CHECK: .functype fma64 (f64, f64, f64) -> (f64)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get $push3=, 0
; CHECK-NEXT: local.get $push2=, 1
; CHECK-NEXT: local.get $push1=, 2
; CHECK-NEXT: call $push0=, fma, $pop3, $pop2, $pop1
; CHECK-NEXT: return $pop0
%d = call double @llvm.fma.f64(double %a, double %b, double %c)
ret double %d
}
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