; 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) {
-fold:
%mul = fmul fast float %a, 0x3FF3333340000000
%mul1 = fmul fast float %mul, 0x4002666660000000
ret float %mul1
-; CHECK: fold
-; CHECK: fmul float %a, 0x4006147AE0000000
+; 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) {
-notfold:
-; CHECK: notfold
+; CHECK-LABEL: @notfold(
; CHECK: %mul = fmul fast float %a, 0x3FF3333340000000
%mul = fmul fast float %a, 0x3FF3333340000000
%mul1 = fmul float %mul, 0x4002666660000000
}
define float @fold2(float %a) {
-notfold2:
-; CHECK: fold2
-; CHECK: fmul float %a, 0x4006147AE0000000
+; 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.
+
+declare double @llvm.sqrt.f64(double)
+
+define double @sqrt_intrinsic_arg_squared(double %x) {
+ %mul = fmul fast double %x, %x
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_arg_squared(
+; CHECK-NEXT: %fabs = call fast 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) {
+ %mul = fmul fast double %y, %x
+ %mul2 = fmul fast double %mul, %x
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args1(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %x, %y
+ %mul2 = fmul fast double %mul, %x
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args2(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %x, %x
+ %mul2 = fmul fast double %mul, %y
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args3(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %y, %x
+ %mul2 = fmul fast double %x, %mul
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args4(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %x, %y
+ %mul2 = fmul fast double %x, %mul
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args5(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %x, %x
+ %mul2 = fmul fast double %y, %mul
+ %sqrt = call fast double @llvm.sqrt.f64(double %mul2)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_intrinsic_three_args6(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: %sqrt1 = call fast 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) {
+ %mul = fmul fast double %x, %x
+ %mul2 = fmul fast double %mul, %mul
+ %sqrt = call fast 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) {
+ %mul = fmul fast double %x, %x
+ %mul2 = fmul fast double %mul, %x
+ %mul3 = fmul fast double %mul2, %mul
+ %sqrt = call fast 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 fast 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) {
+ %mul = fmul fast float %x, %x
+ %sqrt = call fast float @sqrtf(float %mul)
+ ret float %sqrt
+
+; CHECK-LABEL: sqrt_call_squared_f32(
+; CHECK-NEXT: %fabs = call fast float @llvm.fabs.f32(float %x)
+; CHECK-NEXT: ret float %fabs
+}
+
+define double @sqrt_call_squared_f64(double %x) {
+ %mul = fmul fast double %x, %x
+ %sqrt = call fast double @sqrt(double %mul)
+ ret double %sqrt
+
+; CHECK-LABEL: sqrt_call_squared_f64(
+; CHECK-NEXT: %fabs = call fast double @llvm.fabs.f64(double %x)
+; CHECK-NEXT: ret double %fabs
+}
+
+define fp128 @sqrt_call_squared_f128(fp128 %x) {
+ %mul = fmul fast fp128 %x, %x
+ %sqrt = call fast fp128 @sqrtl(fp128 %mul)
+ ret fp128 %sqrt
+
+; CHECK-LABEL: sqrt_call_squared_f128(
+; CHECK-NEXT: %fabs = call fast fp128 @llvm.fabs.f128(fp128 %x)
+; CHECK-NEXT: ret fp128 %fabs
+}
+
+; =========================================================================
+;
+; Test-cases for fmin / fmax
+;
+; =========================================================================
+
+declare double @fmax(double, double)
+declare double @fmin(double, double)
+declare float @fmaxf(float, float)
+declare float @fminf(float, float)
+declare fp128 @fmaxl(fp128, fp128)
+declare fp128 @fminl(fp128, fp128)
+
+; No NaNs is the minimum requirement to replace these calls.
+; This should always be set when unsafe-fp-math is true, but
+; alternate the attributes for additional test coverage.
+; 'nsz' is implied by the definition of fmax or fmin itself.
+
+; Shrink and remove the call.
+define float @max1(float %a, float %b) {
+ %c = fpext float %a to double
+ %d = fpext float %b to double
+ %e = call fast double @fmax(double %c, double %d)
+ %f = fptrunc double %e to float
+ ret float %f
+
+; CHECK-LABEL: max1(
+; CHECK-NEXT: fcmp fast ogt float %a, %b
+; CHECK-NEXT: select {{.*}} float %a, float %b
+; CHECK-NEXT: ret
+}
+
+define float @max2(float %a, float %b) {
+ %c = call nnan float @fmaxf(float %a, float %b)
+ ret float %c
+
+; CHECK-LABEL: max2(
+; CHECK-NEXT: fcmp nnan nsz ogt float %a, %b
+; CHECK-NEXT: select {{.*}} float %a, float %b
+; CHECK-NEXT: ret
+}
+
+
+define double @max3(double %a, double %b) {
+ %c = call fast double @fmax(double %a, double %b)
+ ret double %c
+
+; CHECK-LABEL: max3(
+; CHECK-NEXT: fcmp fast ogt double %a, %b
+; CHECK-NEXT: select {{.*}} double %a, double %b
+; CHECK-NEXT: ret
+}
+
+define fp128 @max4(fp128 %a, fp128 %b) {
+ %c = call nnan fp128 @fmaxl(fp128 %a, fp128 %b)
+ ret fp128 %c
+
+; CHECK-LABEL: max4(
+; CHECK-NEXT: fcmp nnan nsz ogt fp128 %a, %b
+; CHECK-NEXT: select {{.*}} fp128 %a, fp128 %b
+; CHECK-NEXT: ret
+}
+
+; Shrink and remove the call.
+define float @min1(float %a, float %b) {
+ %c = fpext float %a to double
+ %d = fpext float %b to double
+ %e = call nnan double @fmin(double %c, double %d)
+ %f = fptrunc double %e to float
+ ret float %f
+
+; CHECK-LABEL: min1(
+; CHECK-NEXT: fcmp nnan nsz olt float %a, %b
+; CHECK-NEXT: select {{.*}} float %a, float %b
+; CHECK-NEXT: ret
+}
+
+define float @min2(float %a, float %b) {
+ %c = call fast float @fminf(float %a, float %b)
+ ret float %c
+
+; CHECK-LABEL: min2(
+; CHECK-NEXT: fcmp fast olt float %a, %b
+; CHECK-NEXT: select {{.*}} float %a, float %b
+; CHECK-NEXT: ret
+}
+
+define double @min3(double %a, double %b) {
+ %c = call nnan double @fmin(double %a, double %b)
+ ret double %c
+
+; CHECK-LABEL: min3(
+; CHECK-NEXT: fcmp nnan nsz olt double %a, %b
+; CHECK-NEXT: select {{.*}} double %a, double %b
+; CHECK-NEXT: ret
+}
+
+define fp128 @min4(fp128 %a, fp128 %b) {
+ %c = call fast fp128 @fminl(fp128 %a, fp128 %b)
+ ret fp128 %c
+
+; CHECK-LABEL: min4(
+; CHECK-NEXT: fcmp fast olt fp128 %a, %b
+; CHECK-NEXT: select {{.*}} fp128 %a, fp128 %b
+; CHECK-NEXT: ret
+}
projects / oota-llvm.git / blobdiff