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[Analysis] Disable calls to *_finite and other glibc-only functions on Android.

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Since r322087, glibc's finite lib calls are generated when possible.
However, they are not supported on Android. This change also
disables other functions not available on Android.

Differential Revision: http://reviews.llvm.org/D42668

llvm-svn: 323898
This commit is contained in:
Chih-Hung Hsieh 2018-01-31 19:12:50 +00:00
parent 7892ae44b4
commit 60d1e79ffb
2 changed files with 30 additions and 12 deletions
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18
llvm/lib/Analysis/TargetLibraryInfo.cpp
View File

@ -397,24 +397,18 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
TLI.setUnavailable(LibFunc_flsll);
}
// Android uses bionic instead of glibc. So disable some finite
// lib calls in glibc for Android. The list of unsupported lib
// calls for Android may expand as the need arises.
if (T.isAndroid()) {
TLI.setUnavailable(LibFunc_exp_finite);
TLI.setUnavailable(LibFunc_exp2_finite);
TLI.setUnavailable(LibFunc_pow_finite);
}
// The following functions are available on at least Linux:
if (!T.isOSLinux()) {
// The following functions are available on Linux,
// but Android uses bionic instead of glibc.
if (!T.isOSLinux() || T.isAndroid()) {
TLI.setUnavailable(LibFunc_dunder_strdup);
TLI.setUnavailable(LibFunc_dunder_strtok_r);
TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
TLI.setUnavailable(LibFunc_under_IO_getc);
TLI.setUnavailable(LibFunc_under_IO_putc);
TLI.setUnavailable(LibFunc_memalign);
// But, Android has memalign.
if (!T.isAndroid())
TLI.setUnavailable(LibFunc_memalign);
TLI.setUnavailable(LibFunc_fopen64);
TLI.setUnavailable(LibFunc_fseeko64);
TLI.setUnavailable(LibFunc_fstat64);

24
llvm/test/CodeGen/AArch64/illegal-float-ops.ll
View File

@ -265,6 +265,30 @@ define void @test_exp2_finite(double %double) #0 {
ret void
}
define void @test_log_finite(double %double) #0 {
%logdouble = call double @llvm.log.f64(double %double)
store double %logdouble, double* @vardouble
; ANDROID-AARCH64-NOT: bl __log_finite
; CHECK: bl __log_finite
ret void
}
define void @test_log2_finite(double %double) #0 {
%log2double = call double @llvm.log2.f64(double %double)
store double %log2double, double* @vardouble
; ANDROID-AARCH64-NOT: bl __log2_finite
; CHECK: bl __log2_finite
ret void
}
define void @test_log10_finite(double %double) #0 {
%log10double = call double @llvm.log10.f64(double %double)
store double %log10double, double* @vardouble
; ANDROID-AARCH64-NOT: bl __log10_finite
; CHECK: bl __log10_finite
ret void
}
define void @test_pow_finite(double %double) #0 {
%powdouble = call double @llvm.pow.f64(double %double, double %double)
store double %powdouble, double* @vardouble