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