[Sparc] Use synthetic instruction clr to zero register instead of sethi
Using `clr reg`/`mov %g0, reg`/`or %g0, %g0, reg` to zero a register
looks much better than `sethi 0, reg`.
Reviewers: jyknight, venkatra
Reviewed By: jyknight
Subscribers: eraman, fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D45810
llvm-svn: 330396
diff --git a/llvm/test/CodeGen/SPARC/imm.ll b/llvm/test/CodeGen/SPARC/imm.ll
new file mode 100644
index 0000000..a1afb56
--- /dev/null
+++ b/llvm/test/CodeGen/SPARC/imm.ll
@@ -0,0 +1,46 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=sparc | FileCheck %s -check-prefix=SPARC
+
+; Materializing constants
+
+define i32 @zero() nounwind {
+; SPARC-LABEL: zero:
+; SPARC: ! %bb.0:
+; SPARC-NEXT: retl
+; SPARC-NEXT: mov %g0, %o0
+ret i32 0
+}
+
+define i32 @pos_small() nounwind {
+; SPARC-LABEL: pos_small:
+; SPARC: ! %bb.0:
+; SPARC-NEXT: retl
+; SPARC-NEXT: mov 2047, %o0
+ ret i32 2047
+}
+
+define i32 @neg_small() nounwind {
+; SPARC-LABEL: neg_small:
+; SPARC: ! %bb.0:
+; SPARC-NEXT: retl
+; SPARC-NEXT: mov -2047, %o0
+ ret i32 -2047
+}
+
+define i32 @pos_i32() nounwind {
+; SPARC-LABEL: pos_i32:
+; SPARC: ! %bb.0:
+; SPARC-NEXT: sethi 1695242, %o0
+; SPARC-NEXT: retl
+; SPARC-NEXT: or %o0, 751, %o0
+ ret i32 1735928559
+}
+
+define i32 @neg_i32() nounwind {
+; SPARC-LABEL: neg_i32:
+; SPARC: ! %bb.0:
+; SPARC-NEXT: sethi 3648367, %o0
+; SPARC-NEXT: retl
+; SPARC-NEXT: or %o0, 751, %o0
+ ret i32 -559038737
+}