Use small encodings for constants when possible.
llvm-svn: 242493
diff --git a/llvm/test/CodeGen/X86/and-encoding.ll b/llvm/test/CodeGen/X86/and-encoding.ll
new file mode 100644
index 0000000..f7bbac2
--- /dev/null
+++ b/llvm/test/CodeGen/X86/and-encoding.ll
@@ -0,0 +1,41 @@
+; RUN: llc -show-mc-encoding < %s | FileCheck %s
+
+; Test that the direct object emission selects the and variant with 8 bit
+; immediate.
+; We used to get this wrong when using direct object emission, but not when
+; reading assembly.
+
+
+target triple = "x86_64-pc-linux"
+
+define void @f1() {
+; CHECK-LABEL: f1:
+; CHECK: andq $-32, %rsp # encoding: [0x48,0x83,0xe4,0xe0]
+ %foo = alloca i8, align 32
+ ret void
+}
+
+define void @f2(i1 *%x, i16 *%y) {
+; CHECK-LABEL: f2:
+; CHECK: andl $1, %eax # encoding: [0x83,0xe0,0x01]
+ %a = load i1, i1* %x
+ %b = zext i1 %a to i16
+ store i16 %b, i16* %y
+ ret void
+}
+
+define i32 @f3(i1 *%x) {
+; CHECK-LABEL: f3:
+; CHECK: andl $1, %eax # encoding: [0x83,0xe0,0x01]
+ %a = load i1, i1* %x
+ %b = zext i1 %a to i32
+ ret i32 %b
+}
+
+define i64 @f4(i1 *%x) {
+; CHECK-LABEL: f4:
+; CHECK: andl $1, %eax # encoding: [0x83,0xe0,0x01]
+ %a = load i1, i1* %x
+ %b = zext i1 %a to i64
+ ret i64 %b
+}