mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
2d8a36ee71
isNormalFp and isFiniteNonZeroFp should not assume vector operands can not be constant expressions. Patch by Pawel Jurek <pawel.jurek@intel.com> Differential Revision: http://reviews.llvm.org/D8053 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231359 91177308-0d34-0410-b5e6-96231b3b80d8
719 lines
20 KiB
LLVM
719 lines
20 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; testing-case "float fold(float a) { return 1.2f * a * 2.3f; }"
|
|
; 1.2f and 2.3f is supposed to be fold.
|
|
define float @fold(float %a) {
|
|
%mul = fmul fast float %a, 0x3FF3333340000000
|
|
%mul1 = fmul fast float %mul, 0x4002666660000000
|
|
ret float %mul1
|
|
; CHECK-LABEL: @fold(
|
|
; CHECK: fmul fast float %a, 0x4006147AE0000000
|
|
}
|
|
|
|
; Same testing-case as the one used in fold() except that the operators have
|
|
; fixed FP mode.
|
|
define float @notfold(float %a) {
|
|
; CHECK-LABEL: @notfold(
|
|
; CHECK: %mul = fmul fast float %a, 0x3FF3333340000000
|
|
%mul = fmul fast float %a, 0x3FF3333340000000
|
|
%mul1 = fmul float %mul, 0x4002666660000000
|
|
ret float %mul1
|
|
}
|
|
|
|
define float @fold2(float %a) {
|
|
; CHECK-LABEL: @fold2(
|
|
; CHECK: fmul fast float %a, 0x4006147AE0000000
|
|
%mul = fmul float %a, 0x3FF3333340000000
|
|
%mul1 = fmul fast float %mul, 0x4002666660000000
|
|
ret float %mul1
|
|
}
|
|
|
|
; C * f1 + f1 = (C+1) * f1
|
|
define double @fold3(double %f1) {
|
|
%t1 = fmul fast double 2.000000e+00, %f1
|
|
%t2 = fadd fast double %f1, %t1
|
|
ret double %t2
|
|
; CHECK-LABEL: @fold3(
|
|
; CHECK: fmul fast double %f1, 3.000000e+00
|
|
}
|
|
|
|
; (C1 - X) + (C2 - Y) => (C1+C2) - (X + Y)
|
|
define float @fold4(float %f1, float %f2) {
|
|
%sub = fsub float 4.000000e+00, %f1
|
|
%sub1 = fsub float 5.000000e+00, %f2
|
|
%add = fadd fast float %sub, %sub1
|
|
ret float %add
|
|
; CHECK-LABEL: @fold4(
|
|
; CHECK: %1 = fadd fast float %f1, %f2
|
|
; CHECK: fsub fast float 9.000000e+00, %1
|
|
}
|
|
|
|
; (X + C1) + C2 => X + (C1 + C2)
|
|
define float @fold5(float %f1, float %f2) {
|
|
%add = fadd float %f1, 4.000000e+00
|
|
%add1 = fadd fast float %add, 5.000000e+00
|
|
ret float %add1
|
|
; CHECK-LABEL: @fold5(
|
|
; CHECK: fadd fast float %f1, 9.000000e+00
|
|
}
|
|
|
|
; (X + X) + X => 3.0 * X
|
|
define float @fold6(float %f1) {
|
|
%t1 = fadd fast float %f1, %f1
|
|
%t2 = fadd fast float %f1, %t1
|
|
ret float %t2
|
|
; CHECK-LABEL: @fold6(
|
|
; CHECK: fmul fast float %f1, 3.000000e+00
|
|
}
|
|
|
|
; C1 * X + (X + X) = (C1 + 2) * X
|
|
define float @fold7(float %f1) {
|
|
%t1 = fmul fast float %f1, 5.000000e+00
|
|
%t2 = fadd fast float %f1, %f1
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fold7(
|
|
; CHECK: fmul fast float %f1, 7.000000e+00
|
|
}
|
|
|
|
; (X + X) + (X + X) => 4.0 * X
|
|
define float @fold8(float %f1) {
|
|
%t1 = fadd fast float %f1, %f1
|
|
%t2 = fadd fast float %f1, %f1
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fold8
|
|
; CHECK: fmul fast float %f1, 4.000000e+00
|
|
}
|
|
|
|
; X - (X + Y) => 0 - Y
|
|
define float @fold9(float %f1, float %f2) {
|
|
%t1 = fadd float %f1, %f2
|
|
%t3 = fsub fast float %f1, %t1
|
|
ret float %t3
|
|
|
|
; CHECK-LABEL: @fold9(
|
|
; CHECK: fsub fast float -0.000000e+00, %f2
|
|
}
|
|
|
|
; Let C3 = C1 + C2. (f1 + C1) + (f2 + C2) => (f1 + f2) + C3 instead of
|
|
; "(f1 + C3) + f2" or "(f2 + C3) + f1". Placing constant-addend at the
|
|
; top of resulting simplified expression tree may potentially reveal some
|
|
; optimization opportunities in the super-expression trees.
|
|
;
|
|
define float @fold10(float %f1, float %f2) {
|
|
%t1 = fadd fast float 2.000000e+00, %f1
|
|
%t2 = fsub fast float %f2, 3.000000e+00
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fold10(
|
|
; CHECK: %t3 = fadd fast float %t2, -1.000000e+00
|
|
; CHECK: ret float %t3
|
|
}
|
|
|
|
; once cause Crash/miscompilation
|
|
define float @fail1(float %f1, float %f2) {
|
|
%conv3 = fadd fast float %f1, -1.000000e+00
|
|
%add = fadd fast float %conv3, %conv3
|
|
%add2 = fadd fast float %add, %conv3
|
|
ret float %add2
|
|
; CHECK-LABEL: @fail1(
|
|
; CHECK: ret
|
|
}
|
|
|
|
define double @fail2(double %f1, double %f2) {
|
|
%t1 = fsub fast double %f1, %f2
|
|
%t2 = fadd fast double %f1, %f2
|
|
%t3 = fsub fast double %t1, %t2
|
|
ret double %t3
|
|
; CHECK-LABEL: @fail2(
|
|
; CHECK: ret
|
|
}
|
|
|
|
; c1 * x - x => (c1 - 1.0) * x
|
|
define float @fold13(float %x) {
|
|
%mul = fmul fast float %x, 7.000000e+00
|
|
%sub = fsub fast float %mul, %x
|
|
ret float %sub
|
|
; CHECK: fold13
|
|
; CHECK: fmul fast float %x, 6.000000e+00
|
|
; CHECK: ret
|
|
}
|
|
|
|
; -x + y => y - x
|
|
define float @fold14(float %x, float %y) {
|
|
%neg = fsub fast float -0.0, %x
|
|
%add = fadd fast float %neg, %y
|
|
ret float %add
|
|
; CHECK: fold14
|
|
; CHECK: fsub fast float %y, %x
|
|
; CHECK: ret
|
|
}
|
|
|
|
; x + -y => x - y
|
|
define float @fold15(float %x, float %y) {
|
|
%neg = fsub fast float -0.0, %y
|
|
%add = fadd fast float %x, %neg
|
|
ret float %add
|
|
; CHECK: fold15
|
|
; CHECK: fsub fast float %x, %y
|
|
; CHECK: ret
|
|
}
|
|
|
|
; (select X+Y, X-Y) => X + (select Y, -Y)
|
|
define float @fold16(float %x, float %y) {
|
|
%cmp = fcmp ogt float %x, %y
|
|
%plus = fadd fast float %x, %y
|
|
%minus = fsub fast float %x, %y
|
|
%r = select i1 %cmp, float %plus, float %minus
|
|
ret float %r
|
|
; CHECK: fold16
|
|
; CHECK: fsub fast float
|
|
; CHECK: select
|
|
; CHECK: fadd fast float
|
|
; CHECK: ret
|
|
}
|
|
|
|
|
|
|
|
; =========================================================================
|
|
;
|
|
; Testing-cases about fmul begin
|
|
;
|
|
; =========================================================================
|
|
|
|
; ((X*C1) + C2) * C3 => (X * (C1*C3)) + (C2*C3) (i.e. distribution)
|
|
define float @fmul_distribute1(float %f1) {
|
|
%t1 = fmul float %f1, 6.0e+3
|
|
%t2 = fadd float %t1, 2.0e+3
|
|
%t3 = fmul fast float %t2, 5.0e+3
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul_distribute1(
|
|
; CHECK: %1 = fmul fast float %f1, 3.000000e+07
|
|
; CHECK: %t3 = fadd fast float %1, 1.000000e+07
|
|
}
|
|
|
|
; (X/C1 + C2) * C3 => X/(C1/C3) + C2*C3
|
|
define double @fmul_distribute2(double %f1, double %f2) {
|
|
%t1 = fdiv double %f1, 3.0e+0
|
|
%t2 = fadd double %t1, 5.0e+1
|
|
; 0x10000000000000 = DBL_MIN
|
|
%t3 = fmul fast double %t2, 0x10000000000000
|
|
ret double %t3
|
|
|
|
; CHECK-LABEL: @fmul_distribute2(
|
|
; CHECK: %1 = fdiv fast double %f1, 0x7FE8000000000000
|
|
; CHECK: fadd fast double %1, 0x69000000000000
|
|
}
|
|
|
|
; 5.0e-1 * DBL_MIN yields denormal, so "(f1*3.0 + 5.0e-1) * DBL_MIN" cannot
|
|
; be simplified into f1 * (3.0*DBL_MIN) + (5.0e-1*DBL_MIN)
|
|
define double @fmul_distribute3(double %f1) {
|
|
%t1 = fdiv double %f1, 3.0e+0
|
|
%t2 = fadd double %t1, 5.0e-1
|
|
%t3 = fmul fast double %t2, 0x10000000000000
|
|
ret double %t3
|
|
|
|
; CHECK-LABEL: @fmul_distribute3(
|
|
; CHECK: fmul fast double %t2, 0x10000000000000
|
|
}
|
|
|
|
; ((X*C1) + C2) * C3 => (X * (C1*C3)) + (C2*C3) (i.e. distribution)
|
|
define float @fmul_distribute4(float %f1) {
|
|
%t1 = fmul float %f1, 6.0e+3
|
|
%t2 = fsub float 2.0e+3, %t1
|
|
%t3 = fmul fast float %t2, 5.0e+3
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul_distribute4(
|
|
; CHECK: %1 = fmul fast float %f1, 3.000000e+07
|
|
; CHECK: %t3 = fsub fast float 1.000000e+07, %1
|
|
}
|
|
|
|
; C1/X * C2 => (C1*C2) / X
|
|
define float @fmul2(float %f1) {
|
|
%t1 = fdiv float 2.0e+3, %f1
|
|
%t3 = fmul fast float %t1, 6.0e+3
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul2(
|
|
; CHECK: fdiv fast float 1.200000e+07, %f1
|
|
}
|
|
|
|
; X/C1 * C2 => X * (C2/C1) is disabled if X/C1 has multiple uses
|
|
@fmul2_external = external global float
|
|
define float @fmul2_disable(float %f1) {
|
|
%div = fdiv fast float 1.000000e+00, %f1
|
|
store float %div, float* @fmul2_external
|
|
%mul = fmul fast float %div, 2.000000e+00
|
|
ret float %mul
|
|
; CHECK-LABEL: @fmul2_disable
|
|
; CHECK: store
|
|
; CHECK: fmul fast
|
|
}
|
|
|
|
; X/C1 * C2 => X * (C2/C1) (if C2/C1 is normal Fp)
|
|
define float @fmul3(float %f1, float %f2) {
|
|
%t1 = fdiv float %f1, 2.0e+3
|
|
%t3 = fmul fast float %t1, 6.0e+3
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul3(
|
|
; CHECK: fmul fast float %f1, 3.000000e+00
|
|
}
|
|
|
|
define <4 x float> @fmul3_vec(<4 x float> %f1, <4 x float> %f2) {
|
|
%t1 = fdiv <4 x float> %f1, <float 2.0e+3, float 3.0e+3, float 2.0e+3, float 1.0e+3>
|
|
%t3 = fmul fast <4 x float> %t1, <float 6.0e+3, float 6.0e+3, float 2.0e+3, float 1.0e+3>
|
|
ret <4 x float> %t3
|
|
; CHECK-LABEL: @fmul3_vec(
|
|
; CHECK: fmul fast <4 x float> %f1, <float 3.000000e+00, float 2.000000e+00, float 1.000000e+00, float 1.000000e+00>
|
|
}
|
|
|
|
; Make sure fmul with constant expression doesn't assert.
|
|
define <4 x float> @fmul3_vec_constexpr(<4 x float> %f1, <4 x float> %f2) {
|
|
%constExprMul = bitcast i128 trunc (i160 bitcast (<5 x float> <float 6.0e+3, float 6.0e+3, float 2.0e+3, float 1.0e+3, float undef> to i160) to i128) to <4 x float>
|
|
%t1 = fdiv <4 x float> %f1, <float 2.0e+3, float 3.0e+3, float 2.0e+3, float 1.0e+3>
|
|
%t3 = fmul fast <4 x float> %t1, %constExprMul
|
|
ret <4 x float> %t3
|
|
}
|
|
|
|
; Rule "X/C1 * C2 => X * (C2/C1) is not applicable if C2/C1 is either a special
|
|
; value of a denormal. The 0x3810000000000000 here take value FLT_MIN
|
|
;
|
|
define float @fmul4(float %f1, float %f2) {
|
|
%t1 = fdiv float %f1, 2.0e+3
|
|
%t3 = fmul fast float %t1, 0x3810000000000000
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul4(
|
|
; CHECK: fmul fast float %t1, 0x3810000000000000
|
|
}
|
|
|
|
; X / C1 * C2 => X / (C2/C1) if C1/C2 is either a special value of a denormal,
|
|
; and C2/C1 is a normal value.
|
|
;
|
|
define float @fmul5(float %f1, float %f2) {
|
|
%t1 = fdiv float %f1, 3.0e+0
|
|
%t3 = fmul fast float %t1, 0x3810000000000000
|
|
ret float %t3
|
|
; CHECK-LABEL: @fmul5(
|
|
; CHECK: fdiv fast float %f1, 0x47E8000000000000
|
|
}
|
|
|
|
; (X*Y) * X => (X*X) * Y
|
|
define float @fmul6(float %f1, float %f2) {
|
|
%mul = fmul float %f1, %f2
|
|
%mul1 = fmul fast float %mul, %f1
|
|
ret float %mul1
|
|
; CHECK-LABEL: @fmul6(
|
|
; CHECK: fmul fast float %f1, %f1
|
|
}
|
|
|
|
; "(X*Y) * X => (X*X) * Y" is disabled if "X*Y" has multiple uses
|
|
define float @fmul7(float %f1, float %f2) {
|
|
%mul = fmul float %f1, %f2
|
|
%mul1 = fmul fast float %mul, %f1
|
|
%add = fadd float %mul1, %mul
|
|
ret float %add
|
|
; CHECK-LABEL: @fmul7(
|
|
; CHECK: fmul fast float %mul, %f1
|
|
}
|
|
|
|
; =========================================================================
|
|
;
|
|
; Testing-cases about negation
|
|
;
|
|
; =========================================================================
|
|
define float @fneg1(float %f1, float %f2) {
|
|
%sub = fsub float -0.000000e+00, %f1
|
|
%sub1 = fsub nsz float 0.000000e+00, %f2
|
|
%mul = fmul float %sub, %sub1
|
|
ret float %mul
|
|
; CHECK-LABEL: @fneg1(
|
|
; CHECK: fmul float %f1, %f2
|
|
}
|
|
|
|
define float @fneg2(float %x) {
|
|
%sub = fsub nsz float 0.0, %x
|
|
ret float %sub
|
|
; CHECK-LABEL: @fneg2(
|
|
; CHECK-NEXT: fsub nsz float -0.000000e+00, %x
|
|
; CHECK-NEXT: ret float
|
|
}
|
|
|
|
; =========================================================================
|
|
;
|
|
; Testing-cases about div
|
|
;
|
|
; =========================================================================
|
|
|
|
; X/C1 / C2 => X * (1/(C2*C1))
|
|
define float @fdiv1(float %x) {
|
|
%div = fdiv float %x, 0x3FF3333340000000
|
|
%div1 = fdiv fast float %div, 0x4002666660000000
|
|
ret float %div1
|
|
; 0x3FF3333340000000 = 1.2f
|
|
; 0x4002666660000000 = 2.3f
|
|
; 0x3FD7303B60000000 = 0.36231884057971014492
|
|
; CHECK-LABEL: @fdiv1(
|
|
; CHECK: fmul fast float %x, 0x3FD7303B60000000
|
|
}
|
|
|
|
; X*C1 / C2 => X * (C1/C2)
|
|
define float @fdiv2(float %x) {
|
|
%mul = fmul float %x, 0x3FF3333340000000
|
|
%div1 = fdiv fast float %mul, 0x4002666660000000
|
|
ret float %div1
|
|
|
|
; 0x3FF3333340000000 = 1.2f
|
|
; 0x4002666660000000 = 2.3f
|
|
; 0x3FE0B21660000000 = 0.52173918485641479492
|
|
; CHECK-LABEL: @fdiv2(
|
|
; CHECK: fmul fast float %x, 0x3FE0B21660000000
|
|
}
|
|
|
|
define <2 x float> @fdiv2_vec(<2 x float> %x) {
|
|
%mul = fmul <2 x float> %x, <float 6.0, float 9.0>
|
|
%div1 = fdiv fast <2 x float> %mul, <float 2.0, float 3.0>
|
|
ret <2 x float> %div1
|
|
|
|
; CHECK-LABEL: @fdiv2_vec(
|
|
; CHECK: fmul fast <2 x float> %x, <float 3.000000e+00, float 3.000000e+00>
|
|
}
|
|
|
|
; "X/C1 / C2 => X * (1/(C2*C1))" is disabled (for now) is C2/C1 is a denormal
|
|
;
|
|
define float @fdiv3(float %x) {
|
|
%div = fdiv float %x, 0x47EFFFFFE0000000
|
|
%div1 = fdiv fast float %div, 0x4002666660000000
|
|
ret float %div1
|
|
; CHECK-LABEL: @fdiv3(
|
|
; CHECK: fdiv float %x, 0x47EFFFFFE0000000
|
|
}
|
|
|
|
; "X*C1 / C2 => X * (C1/C2)" is disabled if C1/C2 is a denormal
|
|
define float @fdiv4(float %x) {
|
|
%mul = fmul float %x, 0x47EFFFFFE0000000
|
|
%div = fdiv float %mul, 0x3FC99999A0000000
|
|
ret float %div
|
|
; CHECK-LABEL: @fdiv4(
|
|
; CHECK: fmul float %x, 0x47EFFFFFE0000000
|
|
}
|
|
|
|
; (X/Y)/Z = > X/(Y*Z)
|
|
define float @fdiv5(float %f1, float %f2, float %f3) {
|
|
%t1 = fdiv float %f1, %f2
|
|
%t2 = fdiv fast float %t1, %f3
|
|
ret float %t2
|
|
; CHECK-LABEL: @fdiv5(
|
|
; CHECK: fmul float %f2, %f3
|
|
}
|
|
|
|
; Z/(X/Y) = > (Z*Y)/X
|
|
define float @fdiv6(float %f1, float %f2, float %f3) {
|
|
%t1 = fdiv float %f1, %f2
|
|
%t2 = fdiv fast float %f3, %t1
|
|
ret float %t2
|
|
; CHECK-LABEL: @fdiv6(
|
|
; CHECK: fmul float %f3, %f2
|
|
}
|
|
|
|
; C1/(X*C2) => (C1/C2) / X
|
|
define float @fdiv7(float %x) {
|
|
%t1 = fmul float %x, 3.0e0
|
|
%t2 = fdiv fast float 15.0e0, %t1
|
|
ret float %t2
|
|
; CHECK-LABEL: @fdiv7(
|
|
; CHECK: fdiv fast float 5.000000e+00, %x
|
|
}
|
|
|
|
; C1/(X/C2) => (C1*C2) / X
|
|
define float @fdiv8(float %x) {
|
|
%t1 = fdiv float %x, 3.0e0
|
|
%t2 = fdiv fast float 15.0e0, %t1
|
|
ret float %t2
|
|
; CHECK-LABEL: @fdiv8(
|
|
; CHECK: fdiv fast float 4.500000e+01, %x
|
|
}
|
|
|
|
; C1/(C2/X) => (C1/C2) * X
|
|
define float @fdiv9(float %x) {
|
|
%t1 = fdiv float 3.0e0, %x
|
|
%t2 = fdiv fast float 15.0e0, %t1
|
|
ret float %t2
|
|
; CHECK-LABEL: @fdiv9(
|
|
; CHECK: fmul fast float %x, 5.000000e+00
|
|
}
|
|
|
|
; =========================================================================
|
|
;
|
|
; Testing-cases about factorization
|
|
;
|
|
; =========================================================================
|
|
; x*z + y*z => (x+y) * z
|
|
define float @fact_mul1(float %x, float %y, float %z) {
|
|
%t1 = fmul fast float %x, %z
|
|
%t2 = fmul fast float %y, %z
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fact_mul1(
|
|
; CHECK: fmul fast float %1, %z
|
|
}
|
|
|
|
; z*x + y*z => (x+y) * z
|
|
define float @fact_mul2(float %x, float %y, float %z) {
|
|
%t1 = fmul fast float %z, %x
|
|
%t2 = fmul fast float %y, %z
|
|
%t3 = fsub fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fact_mul2(
|
|
; CHECK: fmul fast float %1, %z
|
|
}
|
|
|
|
; z*x - z*y => (x-y) * z
|
|
define float @fact_mul3(float %x, float %y, float %z) {
|
|
%t2 = fmul fast float %z, %y
|
|
%t1 = fmul fast float %z, %x
|
|
%t3 = fsub fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fact_mul3(
|
|
; CHECK: fmul fast float %1, %z
|
|
}
|
|
|
|
; x*z - z*y => (x-y) * z
|
|
define float @fact_mul4(float %x, float %y, float %z) {
|
|
%t1 = fmul fast float %x, %z
|
|
%t2 = fmul fast float %z, %y
|
|
%t3 = fsub fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK-LABEL: @fact_mul4(
|
|
; CHECK: fmul fast float %1, %z
|
|
}
|
|
|
|
; x/y + x/z, no xform
|
|
define float @fact_div1(float %x, float %y, float %z) {
|
|
%t1 = fdiv fast float %x, %y
|
|
%t2 = fdiv fast float %x, %z
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div1
|
|
; CHECK: fadd fast float %t1, %t2
|
|
}
|
|
|
|
; x/y + z/x; no xform
|
|
define float @fact_div2(float %x, float %y, float %z) {
|
|
%t1 = fdiv fast float %x, %y
|
|
%t2 = fdiv fast float %z, %x
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div2
|
|
; CHECK: fadd fast float %t1, %t2
|
|
}
|
|
|
|
; y/x + z/x => (y+z)/x
|
|
define float @fact_div3(float %x, float %y, float %z) {
|
|
%t1 = fdiv fast float %y, %x
|
|
%t2 = fdiv fast float %z, %x
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div3
|
|
; CHECK: fdiv fast float %1, %x
|
|
}
|
|
|
|
; y/x - z/x => (y-z)/x
|
|
define float @fact_div4(float %x, float %y, float %z) {
|
|
%t1 = fdiv fast float %y, %x
|
|
%t2 = fdiv fast float %z, %x
|
|
%t3 = fsub fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div4
|
|
; CHECK: fdiv fast float %1, %x
|
|
}
|
|
|
|
; y/x - z/x => (y-z)/x is disabled if y-z is denormal.
|
|
define float @fact_div5(float %x) {
|
|
%t1 = fdiv fast float 0x3810000000000000, %x
|
|
%t2 = fdiv fast float 0x3800000000000000, %x
|
|
%t3 = fadd fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div5
|
|
; CHECK: fdiv fast float 0x3818000000000000, %x
|
|
}
|
|
|
|
; y/x - z/x => (y-z)/x is disabled if y-z is denormal.
|
|
define float @fact_div6(float %x) {
|
|
%t1 = fdiv fast float 0x3810000000000000, %x
|
|
%t2 = fdiv fast float 0x3800000000000000, %x
|
|
%t3 = fsub fast float %t1, %t2
|
|
ret float %t3
|
|
; CHECK: fact_div6
|
|
; CHECK: %t3 = fsub fast float %t1, %t2
|
|
}
|
|
|
|
; =========================================================================
|
|
;
|
|
; Test-cases for square root
|
|
;
|
|
; =========================================================================
|
|
|
|
; A squared factor fed into a square root intrinsic should be hoisted out
|
|
; as a fabs() value.
|
|
; We have to rely on a function-level attribute to enable this optimization
|
|
; because intrinsics don't currently have access to IR-level fast-math
|
|
; flags. If that changes, we can relax the requirement on all of these
|
|
; tests to just specify 'fast' on the sqrt.
|
|
|
|
attributes #0 = { "unsafe-fp-math" = "true" }
|
|
|
|
declare double @llvm.sqrt.f64(double)
|
|
|
|
define double @sqrt_intrinsic_arg_squared(double %x) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_arg_squared(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: ret double %fabs
|
|
}
|
|
|
|
; Check all 6 combinations of a 3-way multiplication tree where
|
|
; one factor is repeated.
|
|
|
|
define double @sqrt_intrinsic_three_args1(double %x, double %y) #0 {
|
|
%mul = fmul fast double %y, %x
|
|
%mul2 = fmul fast double %mul, %x
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args1(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_three_args2(double %x, double %y) #0 {
|
|
%mul = fmul fast double %x, %y
|
|
%mul2 = fmul fast double %mul, %x
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args2(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_three_args3(double %x, double %y) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%mul2 = fmul fast double %mul, %y
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args3(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_three_args4(double %x, double %y) #0 {
|
|
%mul = fmul fast double %y, %x
|
|
%mul2 = fmul fast double %x, %mul
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args4(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_three_args5(double %x, double %y) #0 {
|
|
%mul = fmul fast double %x, %y
|
|
%mul2 = fmul fast double %x, %mul
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args5(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_three_args6(double %x, double %y) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%mul2 = fmul fast double %y, %mul
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_three_args6(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %y)
|
|
; CHECK-NEXT: %1 = fmul fast double %fabs, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
define double @sqrt_intrinsic_arg_4th(double %x) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%mul2 = fmul fast double %mul, %mul
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul2)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_arg_4th(
|
|
; CHECK-NEXT: %mul = fmul fast double %x, %x
|
|
; CHECK-NEXT: ret double %mul
|
|
}
|
|
|
|
define double @sqrt_intrinsic_arg_5th(double %x) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%mul2 = fmul fast double %mul, %x
|
|
%mul3 = fmul fast double %mul2, %mul
|
|
%sqrt = call double @llvm.sqrt.f64(double %mul3)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_intrinsic_arg_5th(
|
|
; CHECK-NEXT: %mul = fmul fast double %x, %x
|
|
; CHECK-NEXT: %sqrt1 = call double @llvm.sqrt.f64(double %x)
|
|
; CHECK-NEXT: %1 = fmul fast double %mul, %sqrt1
|
|
; CHECK-NEXT: ret double %1
|
|
}
|
|
|
|
; Check that square root calls have the same behavior.
|
|
|
|
declare float @sqrtf(float)
|
|
declare double @sqrt(double)
|
|
declare fp128 @sqrtl(fp128)
|
|
|
|
define float @sqrt_call_squared_f32(float %x) #0 {
|
|
%mul = fmul fast float %x, %x
|
|
%sqrt = call float @sqrtf(float %mul)
|
|
ret float %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_call_squared_f32(
|
|
; CHECK-NEXT: %fabs = call float @llvm.fabs.f32(float %x)
|
|
; CHECK-NEXT: ret float %fabs
|
|
}
|
|
|
|
define double @sqrt_call_squared_f64(double %x) #0 {
|
|
%mul = fmul fast double %x, %x
|
|
%sqrt = call double @sqrt(double %mul)
|
|
ret double %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_call_squared_f64(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: ret double %fabs
|
|
}
|
|
|
|
define fp128 @sqrt_call_squared_f128(fp128 %x) #0 {
|
|
%mul = fmul fast fp128 %x, %x
|
|
%sqrt = call fp128 @sqrtl(fp128 %mul)
|
|
ret fp128 %sqrt
|
|
|
|
; CHECK-LABEL: sqrt_call_squared_f128(
|
|
; CHECK-NEXT: %fabs = call fp128 @llvm.fabs.f128(fp128 %x)
|
|
; CHECK-NEXT: ret fp128 %fabs
|
|
}
|
|
|