[LLVM-C] Add target triple normalization to the C API.

rL333307 was introduced to remove automatic target triple
normalization when calling sys::getDefaultTargetTriple(), arguing
that users of the latter already called Triple::normalize()
if necessary. However, users of the C API currently have no way of
doing target triple normalization.

This patch introduces an LLVMNormalizeTargetTriple function to
the C API which wraps Triple::normalize() and can be used on
the result of LLVMGetDefaultTargetTriple to achieve the same effect.

Differential Revision: https://reviews.llvm.org/D49414

Reviewed By: whitequark

llvm-svn: 337263

diff --git a/llvm/include/llvm-c/TargetMachine.h b/llvm/include/llvm-c/TargetMachine.h
index fb0862c226a6d99ea52943b2e2a4c6ad35e86ed6..7f672b5d10d6e4dc5554dce9811ce7c575ca437b 100644 (file)
--- a/llvm/include/llvm-c/TargetMachine.h
+++ b/llvm/include/llvm-c/TargetMachine.h
@@ -137,6 +137,10 @@ LLVMBool LLVMTargetMachineEmitToMemoryBuffer(LLVMTargetMachineRef T, LLVMModuleR
   disposed with LLVMDisposeMessage. */
 char* LLVMGetDefaultTargetTriple(void);
 
+/** Normalize a target triple. The result needs to be disposed with
+  LLVMDisposeMessage. */
+char* LLVMNormalizeTargetTriple(const char* triple);
+
 /** Get the host CPU as a string. The result needs to be disposed with
   LLVMDisposeMessage. */
 char* LLVMGetHostCPUName(void);

diff --git a/llvm/lib/Target/TargetMachineC.cpp b/llvm/lib/Target/TargetMachineC.cpp
index a6f4790b866795cd6ab8d4047d99c87b14bcdab4..37d398d580f8d5067380509eee9446585911fa9d 100644 (file)
--- a/llvm/lib/Target/TargetMachineC.cpp
+++ b/llvm/lib/Target/TargetMachineC.cpp
@@ -238,6 +238,10 @@ char *LLVMGetDefaultTargetTriple(void) {
   return strdup(sys::getDefaultTargetTriple().c_str());
 }
 
+char *LLVMNormalizeTargetTriple(const char* triple) {
+  return strdup(Triple::normalize(StringRef(triple)).c_str());
+}
+
 char *LLVMGetHostCPUName(void) {
   return strdup(sys::getHostCPUName().data());
 }