[compiler-rt] Add back ARM EABI aliases where legal.

r303188 removed all the uses of aliases for EABI functions from
compiler-rt, because some of them had mismatched calling conventions.
Obviously, we can't use aliases for functions which don't have the same
calling convention, but that's only an issue for floating-point
functions with the hardfloat ABI.  In other cases, the stubs increase
size and reduce performance for no benefit.

This patch adds back the aliases, with appropriate checks to make sure
they're only used in cases where the calling convention matches.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@314851 91177308-0d34-0410-b5e6-96231b3b80d8

40 files changed, 145 insertions, 82 deletions

diff --git a/lib/builtins/adddf3.c b/lib/builtins/adddf3.c
index c528e9e21..9a3901312 100644
--- a/lib/builtins/adddf3.c
+++ b/lib/builtins/adddf3.c
@@ -20,8 +20,11 @@ COMPILER_RT_ABI double __adddf3(double a, double b){
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI double __aeabi_dadd(double a, double b) {
   return __adddf3(a, b);
 }
+#else
+AEABI_RTABI double __aeabi_dadd(double a, double b) COMPILER_RT_ALIAS(__adddf3);
+#endif
 #endif
-
diff --git a/lib/builtins/addsf3.c b/lib/builtins/addsf3.c
index fe570687a..c5c1a41c3 100644
--- a/lib/builtins/addsf3.c
+++ b/lib/builtins/addsf3.c
@@ -20,8 +20,11 @@ COMPILER_RT_ABI float __addsf3(float a, float b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI float __aeabi_fadd(float a, float b) {
   return __addsf3(a, b);
 }
+#else
+AEABI_RTABI float __aeabi_fadd(float a, float b) COMPILER_RT_ALIAS(__addsf3);
+#endif
 #endif
-
diff --git a/lib/builtins/ashldi3.c b/lib/builtins/ashldi3.c
index fcb0abdb1..a5c183600 100644
--- a/lib/builtins/ashldi3.c
+++ b/lib/builtins/ashldi3.c
@@ -41,8 +41,5 @@ __ashldi3(di_int a, si_int b)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_llsl(di_int a, si_int b) {
-  return __ashldi3(a, b);
-}
+AEABI_RTABI di_int __aeabi_llsl(di_int a, si_int b) COMPILER_RT_ALIAS(__ashldi3);
 #endif
-
diff --git a/lib/builtins/ashrdi3.c b/lib/builtins/ashrdi3.c
index b4ab4c617..84619965e 100644
--- a/lib/builtins/ashrdi3.c
+++ b/lib/builtins/ashrdi3.c
@@ -42,8 +42,5 @@ __ashrdi3(di_int a, si_int b)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_lasr(di_int a, si_int b) {
-  return __ashrdi3(a, b);
-}
+AEABI_RTABI di_int __aeabi_lasr(di_int a, si_int b) COMPILER_RT_ALIAS(__ashrdi3);
 #endif
-
diff --git a/lib/builtins/comparedf2.c b/lib/builtins/comparedf2.c
index c5bb169d0..44e5d2b28 100644
--- a/lib/builtins/comparedf2.c
+++ b/lib/builtins/comparedf2.c
@@ -143,8 +143,11 @@ __gtdf2(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI int __aeabi_dcmpun(fp_t a, fp_t b) {
   return __unorddf2(a, b);
 }
+#else
+AEABI_RTABI int __aeabi_dcmpun(fp_t a, fp_t b) COMPILER_RT_ALIAS(__unorddf2);
+#endif
 #endif
-
diff --git a/lib/builtins/comparesf2.c b/lib/builtins/comparesf2.c
index 4badb5e1b..43cd6a6a7 100644
--- a/lib/builtins/comparesf2.c
+++ b/lib/builtins/comparesf2.c
@@ -143,8 +143,11 @@ __gtsf2(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI int __aeabi_fcmpun(fp_t a, fp_t b) {
   return __unordsf2(a, b);
 }
+#else
+AEABI_RTABI int __aeabi_fcmpun(fp_t a, fp_t b) COMPILER_RT_ALIAS(__unordsf2);
+#endif
 #endif
-
diff --git a/lib/builtins/divdf3.c b/lib/builtins/divdf3.c
index 492e32b85..04a4dc557 100644
--- a/lib/builtins/divdf3.c
+++ b/lib/builtins/divdf3.c
@@ -183,8 +183,11 @@ __divdf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_ddiv(fp_t a, fp_t b) {
   return __divdf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_ddiv(fp_t a, fp_t b) COMPILER_RT_ALIAS(__divdf3);
+#endif
 #endif
-
diff --git a/lib/builtins/divsf3.c b/lib/builtins/divsf3.c
index aa6289a6d..65294d70f 100644
--- a/lib/builtins/divsf3.c
+++ b/lib/builtins/divsf3.c
@@ -167,8 +167,11 @@ __divsf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_fdiv(fp_t a, fp_t b) {
   return __divsf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_fdiv(fp_t a, fp_t b) COMPILER_RT_ALIAS(__divsf3);
+#endif
 #endif
-
diff --git a/lib/builtins/divsi3.c b/lib/builtins/divsi3.c
index 3852e3990..75aea008d 100644
--- a/lib/builtins/divsi3.c
+++ b/lib/builtins/divsi3.c
@@ -35,8 +35,5 @@ __divsi3(si_int a, si_int b)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI si_int __aeabi_idiv(si_int a, si_int b) {
-  return __divsi3(a, b);
-}
+AEABI_RTABI si_int __aeabi_idiv(si_int a, si_int b) COMPILER_RT_ALIAS(__divsi3);
 #endif
-
diff --git a/lib/builtins/extendhfsf2.c b/lib/builtins/extendhfsf2.c
index e7d9fde8a..d9c0db84b 100644
--- a/lib/builtins/extendhfsf2.c
+++ b/lib/builtins/extendhfsf2.c
@@ -23,8 +23,11 @@ COMPILER_RT_ABI float __gnu_h2f_ieee(uint16_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI float __aeabi_h2f(uint16_t a) {
   return __extendhfsf2(a);
 }
+#else
+AEABI_RTABI float __aeabi_h2f(uint16_t a) COMPILER_RT_ALIAS(__extendhfsf2);
+#endif
 #endif
-
diff --git a/lib/builtins/extendsfdf2.c b/lib/builtins/extendsfdf2.c
index b9e7a7471..3d84529a6 100644
--- a/lib/builtins/extendsfdf2.c
+++ b/lib/builtins/extendsfdf2.c
@@ -17,8 +17,11 @@ COMPILER_RT_ABI double __extendsfdf2(float a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI double __aeabi_f2d(float a) {
   return __extendsfdf2(a);
 }
+#else
+AEABI_RTABI double __aeabi_f2d(float a) COMPILER_RT_ALIAS(__extendsfdf2);
+#endif
 #endif
-
diff --git a/lib/builtins/fixdfdi.c b/lib/builtins/fixdfdi.c
index 31d76df28..54e312d3c 100644
--- a/lib/builtins/fixdfdi.c
+++ b/lib/builtins/fixdfdi.c
@@ -45,13 +45,11 @@ __fixdfdi(fp_t a) {
 #endif
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int
-#if defined(__SOFT_FP__)
-__aeabi_d2lz(fp_t a) {
-#else
-__aeabi_d2lz(double a) {
-#endif
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI di_int __aeabi_d2lz(fp_t a) {
   return __fixdfdi(a);
 }
+#else
+AEABI_RTABI di_int __aeabi_d2lz(fp_t a) COMPILER_RT_ALIAS(__fixdfdi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixdfsi.c b/lib/builtins/fixdfsi.c
index fc316dcd0..5b9588175 100644
--- a/lib/builtins/fixdfsi.c
+++ b/lib/builtins/fixdfsi.c
@@ -20,8 +20,11 @@ __fixdfsi(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI si_int __aeabi_d2iz(fp_t a) {
   return __fixdfsi(a);
 }
+#else
+AEABI_RTABI si_int __aeabi_d2iz(fp_t a) COMPILER_RT_ALIAS(__fixdfsi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixsfdi.c b/lib/builtins/fixsfdi.c
index c43473637..32e87c608 100644
--- a/lib/builtins/fixsfdi.c
+++ b/lib/builtins/fixsfdi.c
@@ -45,13 +45,11 @@ __fixsfdi(fp_t a) {
 #endif
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int
-#if defined(__SOFT_FP__)
-__aeabi_f2lz(fp_t a) {
-#else
-__aeabi_f2lz(float a) {
-#endif
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI di_int __aeabi_f2lz(fp_t a) {
   return __fixsfdi(a);
 }
+#else
+AEABI_RTABI di_int __aeabi_f2lz(fp_t a) COMPILER_RT_ALIAS(__fixsfdi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixsfsi.c b/lib/builtins/fixsfsi.c
index 3276df966..e94e5f3dc 100644
--- a/lib/builtins/fixsfsi.c
+++ b/lib/builtins/fixsfsi.c
@@ -20,8 +20,11 @@ __fixsfsi(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI si_int __aeabi_f2iz(fp_t a) {
   return __fixsfsi(a);
 }
+#else
+AEABI_RTABI si_int __aeabi_f2iz(fp_t a) COMPILER_RT_ALIAS(__fixsfsi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixunsdfdi.c b/lib/builtins/fixunsdfdi.c
index b73440970..bfe4dbb25 100644
--- a/lib/builtins/fixunsdfdi.c
+++ b/lib/builtins/fixunsdfdi.c
@@ -42,13 +42,11 @@ __fixunsdfdi(fp_t a) {
 #endif
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI du_int
-#if defined(__SOFT_FP__)
-__aeabi_d2ulz(fp_t a) {
-#else
-__aeabi_d2ulz(double a) {
-#endif
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI du_int __aeabi_d2ulz(fp_t a) {
   return __fixunsdfdi(a);
 }
+#else
+AEABI_RTABI du_int __aeabi_d2ulz(fp_t a) COMPILER_RT_ALIAS(__fixunsdfdi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixunsdfsi.c b/lib/builtins/fixunsdfsi.c
index bb3d8e0f8..3c5355bea 100644
--- a/lib/builtins/fixunsdfsi.c
+++ b/lib/builtins/fixunsdfsi.c
@@ -19,8 +19,11 @@ __fixunsdfsi(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI su_int __aeabi_d2uiz(fp_t a) {
   return __fixunsdfsi(a);
 }
+#else
+AEABI_RTABI su_int __aeabi_d2uiz(fp_t a) COMPILER_RT_ALIAS(__fixunsdfsi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixunssfdi.c b/lib/builtins/fixunssfdi.c
index 5d92245df..080a25bb1 100644
--- a/lib/builtins/fixunssfdi.c
+++ b/lib/builtins/fixunssfdi.c
@@ -43,13 +43,11 @@ __fixunssfdi(fp_t a) {
 #endif
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI du_int
-#if defined(__SOFT_FP__)
-__aeabi_f2ulz(fp_t a) {
-#else
-__aeabi_f2ulz(float a) {
-#endif
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI du_int __aeabi_f2ulz(fp_t a) {
   return __fixunssfdi(a);
 }
+#else
+AEABI_RTABI du_int __aeabi_f2ulz(fp_t a) COMPILER_RT_ALIAS(__fixunssfdi);
+#endif
 #endif
-
diff --git a/lib/builtins/fixunssfsi.c b/lib/builtins/fixunssfsi.c
index 91d5e8ae5..eca2916a5 100644
--- a/lib/builtins/fixunssfsi.c
+++ b/lib/builtins/fixunssfsi.c
@@ -23,8 +23,11 @@ __fixunssfsi(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI su_int __aeabi_f2uiz(fp_t a) {
   return __fixunssfsi(a);
 }
+#else
+AEABI_RTABI su_int __aeabi_f2uiz(fp_t a) COMPILER_RT_ALIAS(__fixunssfsi);
+#endif
 #endif
-
diff --git a/lib/builtins/floatdidf.c b/lib/builtins/floatdidf.c
index 681fecef9..36b856e07 100644
--- a/lib/builtins/floatdidf.c
+++ b/lib/builtins/floatdidf.c
@@ -105,8 +105,11 @@ __floatdidf(di_int a)
 #endif
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI double __aeabi_l2d(di_int a) {
   return __floatdidf(a);
 }
+#else
+AEABI_RTABI double __aeabi_l2d(di_int a) COMPILER_RT_ALIAS(__floatdidf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatdisf.c b/lib/builtins/floatdisf.c
index dd548165c..a2f09eb2e 100644
--- a/lib/builtins/floatdisf.c
+++ b/lib/builtins/floatdisf.c
@@ -78,8 +78,11 @@ __floatdisf(di_int a)
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI float __aeabi_l2f(di_int a) {
   return __floatdisf(a);
 }
+#else
+AEABI_RTABI float __aeabi_l2f(di_int a) COMPILER_RT_ALIAS(__floatdisf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatsidf.c b/lib/builtins/floatsidf.c
index 2ae395bdc..fe051123c 100644
--- a/lib/builtins/floatsidf.c
+++ b/lib/builtins/floatsidf.c
@@ -51,8 +51,11 @@ __floatsidf(int a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_i2d(int a) {
   return __floatsidf(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_i2d(int a) COMPILER_RT_ALIAS(__floatsidf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatsisf.c b/lib/builtins/floatsisf.c
index 08891fcdf..bf087ee3c 100644
--- a/lib/builtins/floatsisf.c
+++ b/lib/builtins/floatsisf.c
@@ -57,8 +57,11 @@ __floatsisf(int a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_i2f(int a) {
   return __floatsisf(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_i2f(int a) COMPILER_RT_ALIAS(__floatsisf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatundidf.c b/lib/builtins/floatundidf.c
index 6c1a931ef..8bc2a0963 100644
--- a/lib/builtins/floatundidf.c
+++ b/lib/builtins/floatundidf.c
@@ -104,8 +104,11 @@ __floatundidf(du_int a)
 #endif
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI double __aeabi_ul2d(du_int a) {
   return __floatundidf(a);
 }
+#else
+AEABI_RTABI double __aeabi_ul2d(du_int a) COMPILER_RT_ALIAS(__floatundidf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatundisf.c b/lib/builtins/floatundisf.c
index 86841a75d..844786ea7 100644
--- a/lib/builtins/floatundisf.c
+++ b/lib/builtins/floatundisf.c
@@ -75,8 +75,11 @@ __floatundisf(du_int a)
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI float __aeabi_ul2f(du_int a) {
   return __floatundisf(a);
 }
+#else
+AEABI_RTABI float __aeabi_ul2f(du_int a) COMPILER_RT_ALIAS(__floatundisf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatunsidf.c b/lib/builtins/floatunsidf.c
index 8d4807194..75cf6b917 100644
--- a/lib/builtins/floatunsidf.c
+++ b/lib/builtins/floatunsidf.c
@@ -40,8 +40,11 @@ __floatunsidf(unsigned int a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_ui2d(unsigned int a) {
   return __floatunsidf(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_ui2d(unsigned int a) COMPILER_RT_ALIAS(__floatunsidf);
+#endif
 #endif
-
diff --git a/lib/builtins/floatunsisf.c b/lib/builtins/floatunsisf.c
index f194c046d..29525cced 100644
--- a/lib/builtins/floatunsisf.c
+++ b/lib/builtins/floatunsisf.c
@@ -48,8 +48,11 @@ __floatunsisf(unsigned int a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_ui2f(unsigned int a) {
   return __floatunsisf(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_ui2f(unsigned int a) COMPILER_RT_ALIAS(__floatunsisf);
+#endif
 #endif
-
diff --git a/lib/builtins/int_lib.h b/lib/builtins/int_lib.h
index 9a8092d50..9d09e2dc9 100644
--- a/lib/builtins/int_lib.h
+++ b/lib/builtins/int_lib.h
@@ -22,9 +22,11 @@
 
 #if defined(__ELF__)
 #define FNALIAS(alias_name, original_name) \
-  void alias_name() __attribute__((alias(#original_name)))
+  void alias_name() __attribute__((__alias__(#original_name)))
+#define COMPILER_RT_ALIAS(aliasee) __attribute__((__alias__(#aliasee)))
 #else
 #define FNALIAS(alias, name) _Pragma("GCC error(\"alias unsupported on this file format\")")
+#define COMPILER_RT_ALIAS(aliasee) _Pragma("GCC error(\"alias unsupported on this file format\")")
 #endif
 
 /* ABI macro definitions */
diff --git a/lib/builtins/lshrdi3.c b/lib/builtins/lshrdi3.c
index becbbef4e..67b2a7668 100644
--- a/lib/builtins/lshrdi3.c
+++ b/lib/builtins/lshrdi3.c
@@ -41,8 +41,5 @@ __lshrdi3(di_int a, si_int b)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_llsr(di_int a, si_int b) {
-  return __lshrdi3(a, b);
-}
+AEABI_RTABI di_int __aeabi_llsr(di_int a, si_int b) COMPILER_RT_ALIAS(__lshrdi3);
 #endif
-
diff --git a/lib/builtins/muldf3.c b/lib/builtins/muldf3.c
index 59a60190e..1bb103e38 100644
--- a/lib/builtins/muldf3.c
+++ b/lib/builtins/muldf3.c
@@ -20,8 +20,11 @@ COMPILER_RT_ABI fp_t __muldf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_dmul(fp_t a, fp_t b) {
   return __muldf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_dmul(fp_t a, fp_t b) COMPILER_RT_ALIAS(__muldf3);
+#endif
 #endif
-
diff --git a/lib/builtins/muldi3.c b/lib/builtins/muldi3.c
index 6818a9e2f..a187315e9 100644
--- a/lib/builtins/muldi3.c
+++ b/lib/builtins/muldi3.c
@@ -54,8 +54,5 @@ __muldi3(di_int a, di_int b)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_lmul(di_int a, di_int b) {
-  return __muldi3(a, b);
-}
+AEABI_RTABI di_int __aeabi_lmul(di_int a, di_int b) COMPILER_RT_ALIAS(__muldi3);
 #endif
-
diff --git a/lib/builtins/mulsf3.c b/lib/builtins/mulsf3.c
index f141af1ac..1e2cf3e71 100644
--- a/lib/builtins/mulsf3.c
+++ b/lib/builtins/mulsf3.c
@@ -20,8 +20,11 @@ COMPILER_RT_ABI fp_t __mulsf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_fmul(fp_t a, fp_t b) {
   return __mulsf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_fmul(fp_t a, fp_t b) COMPILER_RT_ALIAS(__mulsf3);
+#endif
 #endif
-
diff --git a/lib/builtins/negdf2.c b/lib/builtins/negdf2.c
index 5e2544cdb..f0bfaad24 100644
--- a/lib/builtins/negdf2.c
+++ b/lib/builtins/negdf2.c
@@ -20,8 +20,11 @@ __negdf2(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_dneg(fp_t a) {
   return __negdf2(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_dneg(fp_t a) COMPILER_RT_ALIAS(__negdf2);
+#endif
 #endif
-
diff --git a/lib/builtins/negsf2.c b/lib/builtins/negsf2.c
index f90b34335..05c97d4d5 100644
--- a/lib/builtins/negsf2.c
+++ b/lib/builtins/negsf2.c
@@ -20,8 +20,11 @@ __negsf2(fp_t a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_fneg(fp_t a) {
   return __negsf2(a);
 }
+#else
+AEABI_RTABI fp_t __aeabi_fneg(fp_t a) COMPILER_RT_ALIAS(__negsf2);
+#endif
 #endif
-
diff --git a/lib/builtins/subdf3.c b/lib/builtins/subdf3.c
index 38340dfab..a892fa603 100644
--- a/lib/builtins/subdf3.c
+++ b/lib/builtins/subdf3.c
@@ -22,8 +22,11 @@ __subdf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) {
   return __subdf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) COMPILER_RT_ALIAS(__subdf3);
+#endif
 #endif
-
diff --git a/lib/builtins/subsf3.c b/lib/builtins/subsf3.c
index 34276b144..4b2786177 100644
--- a/lib/builtins/subsf3.c
+++ b/lib/builtins/subsf3.c
@@ -22,8 +22,11 @@ __subsf3(fp_t a, fp_t b) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) {
   return __subsf3(a, b);
 }
+#else
+AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) COMPILER_RT_ALIAS(__subsf3);
+#endif
 #endif
-
diff --git a/lib/builtins/truncdfhf2.c b/lib/builtins/truncdfhf2.c
index 4bb71aa17..8354a41b8 100644
--- a/lib/builtins/truncdfhf2.c
+++ b/lib/builtins/truncdfhf2.c
@@ -16,8 +16,11 @@ COMPILER_RT_ABI uint16_t __truncdfhf2(double a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI uint16_t __aeabi_d2h(double a) {
   return __truncdfhf2(a);
 }
+#else
+AEABI_RTABI uint16_t __aeabi_d2h(double a) COMPILER_RT_ALIAS(__truncdfhf2);
+#endif
 #endif
-
diff --git a/lib/builtins/truncdfsf2.c b/lib/builtins/truncdfsf2.c
index 8bf58bb23..195d3e065 100644
--- a/lib/builtins/truncdfsf2.c
+++ b/lib/builtins/truncdfsf2.c
@@ -16,8 +16,11 @@ COMPILER_RT_ABI float __truncdfsf2(double a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI float __aeabi_d2f(double a) {
   return __truncdfsf2(a);
 }
+#else
+AEABI_RTABI float __aeabi_d2f(double a) COMPILER_RT_ALIAS(__truncdfsf2);
+#endif
 #endif
-
diff --git a/lib/builtins/truncsfhf2.c b/lib/builtins/truncsfhf2.c
index f6ce1fa1d..9c84ab4f9 100644
--- a/lib/builtins/truncsfhf2.c
+++ b/lib/builtins/truncsfhf2.c
@@ -22,8 +22,11 @@ COMPILER_RT_ABI uint16_t __gnu_f2h_ieee(float a) {
 }
 
 #if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
 AEABI_RTABI uint16_t __aeabi_f2h(float a) {
   return __truncsfhf2(a);
 }
+#else
+AEABI_RTABI uint16_t __aeabi_f2h(float a) COMPILER_RT_ALIAS(__truncsfhf2);
+#endif
 #endif
-
diff --git a/lib/builtins/udivsi3.c b/lib/builtins/udivsi3.c
index 8eccf102c..bb720f8c3 100644
--- a/lib/builtins/udivsi3.c
+++ b/lib/builtins/udivsi3.c
@@ -64,8 +64,5 @@ __udivsi3(su_int n, su_int d)
 }
 
 #if defined(__ARM_EABI__)
-AEABI_RTABI su_int __aeabi_uidiv(su_int n, su_int d) {
-  return __udivsi3(n, d);
-}
+AEABI_RTABI su_int __aeabi_uidiv(su_int n, su_int d) COMPILER_RT_ALIAS(__udivsi3);
 #endif
-