; RUN: llc -O3 -mtriple=x86_64-pc-linux < %s | FileCheck --check-prefix=COMMON --check-prefix=NO-FMA --check-prefix=FMACALL64 --check-prefix=FMACALL32 %s
; RUN: llc -O3 -mtriple=x86_64-pc-linux -mattr=+fma < %s | FileCheck -check-prefix=COMMON --check-prefix=HAS-FMA --check-prefix=FMA64 --check-prefix=FMA32 %s
; Verify that constants aren't folded to inexact results when the rounding mode
; is unknown.
;
; double f1() {
; // Because 0.1 cannot be represented exactly, this shouldn't be folded.
; return 1.0/10.0;
; }
;
; CHECK-LABEL: f1
; COMMON: divsd
define double @f1() {
entry:
%div = call double @llvm.experimental.constrained.fdiv.f64(
double 1.000000e+00,
double 1.000000e+01,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %div
}
; Verify that 'a - 0' isn't simplified to 'a' when the rounding mode is unknown.
;
; double f2(double a) {
; // Because the result of '0 - 0' is negative zero if rounding mode is
; // downward, this shouldn't be simplified.
; return a - 0;
; }
;
; CHECK-LABEL: f2
; COMMON: subsd
define double @f2(double %a) {
entry:
%sub = call double @llvm.experimental.constrained.fsub.f64(
double %a,
double 0.000000e+00,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %sub
}
; Verify that '-((-a)*b)' isn't simplified to 'a*b' when the rounding mode is
; unknown.
;
; double f3(double a, double b) {
; // Because the intermediate value involved in this calculation may require
; // rounding, this shouldn't be simplified.
; return -((-a)*b);
; }
;
; CHECK-LABEL: f3:
; COMMON: subsd
; COMMON: mulsd
; COMMON: subsd
define double @f3(double %a, double %b) {
entry:
%sub = call double @llvm.experimental.constrained.fsub.f64(
double -0.000000e+00, double %a,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
%mul = call double @llvm.experimental.constrained.fmul.f64(
double %sub, double %b,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
%ret = call double @llvm.experimental.constrained.fsub.f64(
double -0.000000e+00,
double %mul,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %ret
}
; Verify that FP operations are not performed speculatively when FP exceptions
; are not being ignored.
;
; double f4(int n, double a) {
; // Because a + 1 may overflow, this should not be simplified.
; if (n > 0)
; return a + 1.0;
; return a;
; }
;
;
; CHECK-LABEL: f4:
; COMMON: testl
; COMMON: jle
; COMMON: addsd
define double @f4(i32 %n, double %a) {
entry:
%cmp = icmp sgt i32 %n, 0
br i1 %cmp, label %if.then, label %if.end
if.then:
%add = call double @llvm.experimental.constrained.fadd.f64(
double 1.000000e+00, double %a,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
br label %if.end
if.end:
%a.0 = phi double [%add, %if.then], [ %a, %entry ]
ret double %a.0
}
; Verify that sqrt(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f5
; COMMON: sqrtsd
define double @f5() {
entry:
%result = call double @llvm.experimental.constrained.sqrt.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that pow(42.1, 3.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f6
; COMMON: pow
define double @f6() {
entry:
%result = call double @llvm.experimental.constrained.pow.f64(double 42.1,
double 3.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that powi(42.1, 3) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f7
; COMMON: powi
define double @f7() {
entry:
%result = call double @llvm.experimental.constrained.powi.f64(double 42.1,
i32 3,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that sin(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f8
; COMMON: sin
define double @f8() {
entry:
%result = call double @llvm.experimental.constrained.sin.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that cos(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f9
; COMMON: cos
define double @f9() {
entry:
%result = call double @llvm.experimental.constrained.cos.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that exp(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f10
; COMMON: exp
define double @f10() {
entry:
%result = call double @llvm.experimental.constrained.exp.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that exp2(42.1) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f11
; COMMON: exp2
define double @f11() {
entry:
%result = call double @llvm.experimental.constrained.exp2.f64(double 42.1,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that log(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f12
; COMMON: log
define double @f12() {
entry:
%result = call double @llvm.experimental.constrained.log.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that log10(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f13
; COMMON: log10
define double @f13() {
entry:
%result = call double @llvm.experimental.constrained.log10.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that log2(42.0) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f14
; COMMON: log2
define double @f14() {
entry:
%result = call double @llvm.experimental.constrained.log2.f64(double 42.0,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that rint(42.1) isn't simplified when the rounding mode is unknown.
; CHECK-LABEL: f15
; NO-FMA: rint
; HAS-FMA: vroundsd
define double @f15() {
entry:
%result = call double @llvm.experimental.constrained.rint.f64(double 42.1,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that nearbyint(42.1) isn't simplified when the rounding mode is
; unknown.
; CHECK-LABEL: f16
; NO-FMA: nearbyint
; HAS-FMA: vroundsd
define double @f16() {
entry:
%result = call double @llvm.experimental.constrained.nearbyint.f64(
double 42.1,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
; Verify that fma(3.5) isn't simplified when the rounding mode is
; unknown.
; CHECK-LABEL: f17
; FMACALL32: jmp fmaf # TAILCALL
; FMA32: vfmadd213ss
define float @f17() {
entry:
%result = call float @llvm.experimental.constrained.fma.f32(
float 3.5,
float 3.5,
float 3.5,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret float %result
}
; Verify that fma(42.1) isn't simplified when the rounding mode is
; unknown.
; CHECK-LABEL: f18
; FMACALL64: jmp fma # TAILCALL
; FMA64: vfmadd213sd
define double @f18() {
entry:
%result = call double @llvm.experimental.constrained.fma.f64(
double 42.1,
double 42.1,
double 42.1,
metadata !"round.dynamic",
metadata !"fpexcept.strict")
ret double %result
}
@llvm.fp.env = thread_local global i8 zeroinitializer, section "llvm.metadata"
declare double @llvm.experimental.constrained.fdiv.f64(double, double, metadata, metadata)
declare double @llvm.experimental.constrained.fmul.f64(double, double, metadata, metadata)
declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata)
declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata)
declare double @llvm.experimental.constrained.sqrt.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.pow.f64(double, double, metadata, metadata)
declare double @llvm.experimental.constrained.powi.f64(double, i32, metadata, metadata)
declare double @llvm.experimental.constrained.sin.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.cos.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.exp.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.exp2.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.log.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.log10.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.log2.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.rint.f64(double, metadata, metadata)
declare double @llvm.experimental.constrained.nearbyint.f64(double, metadata, metadata)
declare float @llvm.experimental.constrained.fma.f32(float, float, float, metadata, metadata)
declare double @llvm.experimental.constrained.fma.f64(double, double, double, metadata, metadata)