Recognize "bswapq" as an alternate spelling for the bswap instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67071 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index 226feb7..f3faa70 100644 (file)
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -411,8 +411,8 @@ bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
 
     // bswap $0
     if (AsmPieces.size() == 2 &&
-        AsmPieces[0] == "bswap" && (AsmPieces[1] == "$0" ||
-                                    AsmPieces[1] == "${0:q}")) {
+        (AsmPieces[0] == "bswap" || AsmPieces[0] == "bswapq") &&
+        (AsmPieces[1] == "$0" || AsmPieces[1] == "${0:q}")) {
       // No need to check constraints, nothing other than the equivalent of
       // "=r,0" would be valid here.
       return LowerToBSwap(CI);

diff --git a/test/CodeGen/X86/bswap-inline-asm.ll b/test/CodeGen/X86/bswap-inline-asm.ll
new file mode 100644 (file)
index 0000000..c44d845
--- /dev/null
+++ b/test/CodeGen/X86/bswap-inline-asm.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | llc -march=x86-64 > %t
+; RUN: not grep APP %t
+; RUN: grep bswapq %t | count 2
+
+define i64 @foo(i64 %x) nounwind {
+       %asmtmp = tail call i64 asm "bswap $0", "=r,0,~{dirflag},~{fpsr},~{flags}"(i64 %x) nounwind
+       ret i64 %asmtmp
+}
+define i64 @bar(i64 %x) nounwind {
+       %asmtmp = tail call i64 asm "bswapq ${0:q}", "=r,0,~{dirflag},~{fpsr},~{flags}"(i64 %x) nounwind
+       ret i64 %asmtmp
+}