Fix support for inline asm input / output operand tying when operand spans across multiple registers (e.g. two i64 operands in 32-bit mode).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74053 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/inline-asm-tied.ll b/test/CodeGen/X86/inline-asm-tied.ll
new file mode 100644
index 0000000..6df2c48
--- /dev/null
+++ b/test/CodeGen/X86/inline-asm-tied.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin9 -O0 | grep {movl %edx, 4(%esp)} | count 2
+; rdar://6992609
+
+target triple = "i386-apple-darwin9.0"
+@llvm.used = appending global [1 x i8*] [i8* bitcast (i64 (i64)* @_OSSwapInt64 to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
+
+define i64 @_OSSwapInt64(i64 %_data) nounwind {
+entry:
+ %retval = alloca i64 ; <i64*> [#uses=2]
+ %_data.addr = alloca i64 ; <i64*> [#uses=4]
+ store i64 %_data, i64* %_data.addr
+ %tmp = load i64* %_data.addr ; <i64> [#uses=1]
+ %0 = call i64 asm "bswap %eax\0A\09bswap %edx\0A\09xchgl %eax, %edx", "=A,0,~{dirflag},~{fpsr},~{flags}"(i64 %tmp) nounwind ; <i64> [#uses=1]
+ store i64 %0, i64* %_data.addr
+ %tmp1 = load i64* %_data.addr ; <i64> [#uses=1]
+ store i64 %tmp1, i64* %retval
+ %1 = load i64* %retval ; <i64> [#uses=1]
+ ret i64 %1
+}