Revert "std.os.linux.sparc64: use icc instead of xcc in asm clobbers"

This reverts commit b34a13d.

This is not the right fix; rather, the C backend needs to translate all of ccr,
icc, and xcc to just icc.

Author: alexrp

lib/std/os/linux/sparc64.zig

@@ -41,7 +41,7 @@ pub fn syscall_fork() u64 {
         \\ 2:
         : [ret] "={o0}" (-> u64),
         : [number] "{g1}" (@intFromEnum(SYS.fork)),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall0(number: SYS) u64 {
@@ -53,7 +53,7 @@ pub fn syscall0(number: SYS) u64 {
         \\ 1:
         : [ret] "={o0}" (-> u64),
         : [number] "{g1}" (@intFromEnum(number)),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall1(number: SYS, arg1: u64) u64 {
@@ -66,7 +66,7 @@ pub fn syscall1(number: SYS, arg1: u64) u64 {
         : [ret] "={o0}" (-> u64),
         : [number] "{g1}" (@intFromEnum(number)),
           [arg1] "{o0}" (arg1),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall2(number: SYS, arg1: u64, arg2: u64) u64 {
@@ -80,7 +80,7 @@ pub fn syscall2(number: SYS, arg1: u64, arg2: u64) u64 {
         : [number] "{g1}" (@intFromEnum(number)),
           [arg1] "{o0}" (arg1),
           [arg2] "{o1}" (arg2),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall3(number: SYS, arg1: u64, arg2: u64, arg3: u64) u64 {
@@ -95,7 +95,7 @@ pub fn syscall3(number: SYS, arg1: u64, arg2: u64, arg3: u64) u64 {
           [arg1] "{o0}" (arg1),
           [arg2] "{o1}" (arg2),
           [arg3] "{o2}" (arg3),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall4(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64) u64 {
@@ -111,7 +111,7 @@ pub fn syscall4(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64) u64 {
           [arg2] "{o1}" (arg2),
           [arg3] "{o2}" (arg3),
           [arg4] "{o3}" (arg4),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall5(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64, arg5: u64) u64 {
@@ -128,7 +128,7 @@ pub fn syscall5(number: SYS, arg1: u64, arg2: u64, arg3: u64, arg4: u64, arg5: u
           [arg3] "{o2}" (arg3),
           [arg4] "{o3}" (arg4),
           [arg5] "{o4}" (arg5),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn syscall6(
@@ -154,7 +154,7 @@ pub fn syscall6(
           [arg4] "{o3}" (arg4),
           [arg5] "{o4}" (arg5),
           [arg6] "{o5}" (arg6),
-        : .{ .memory = true, .icc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub fn clone() callconv(.naked) u64 {
@@ -220,7 +220,7 @@ pub fn restore_rt() callconv(.c) void {
     return asm volatile ("t 0x6d"
         :
         : [number] "{g1}" (@intFromEnum(SYS.rt_sigreturn)),
-        : .{ .memory = true, .icc = true, .o0 = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
+        : .{ .memory = true, .xcc = true, .o0 = true, .o1 = true, .o2 = true, .o3 = true, .o4 = true, .o5 = true, .o7 = true });
 }
 
 pub const VDSO = struct {