[compiler-rt] Add libgcc compatibility aliases for __cmp{s,d,f}f2.

Reviewers: compnerd

Subscribers: asl, llvm-commits

Differential Revision: http://reviews.llvm.org/D12091

llvm-svn: 245663

compiler-rt/lib/builtins/comparedf2.c

@@ -80,6 +80,9 @@ __ledf2(fp_t a, fp_t b) {
     }
 }
 
+// Alias for libgcc compatibility
+FNALIAS(__cmpdf2, __ledf2);
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,

compiler-rt/lib/builtins/comparesf2.c

@@ -80,6 +80,9 @@ __lesf2(fp_t a, fp_t b) {
     }
 }
 
+// Alias for libgcc compatibility
+FNALIAS(__cmpsf2, __lesf2);
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,

compiler-rt/lib/builtins/comparetf2.c

@@ -79,6 +79,9 @@ COMPILER_RT_ABI enum LE_RESULT __letf2(fp_t a, fp_t b) {
     }
 }
 
+// Alias for libgcc compatibility
+FNALIAS(__cmptf2, __letf2);
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,

compiler-rt/lib/builtins/int_lib.h

@@ -20,6 +20,9 @@
 /* Assumption: Right shift of signed negative is arithmetic shift. */
 /* Assumption: Endianness is little or big (not mixed). */
 
+#define FNALIAS(alias_name, original_name) \
+  void alias_name() __attribute__((alias(#original_name)))
+
 /* ABI macro definitions */
 
 #if __ARM_EABI__