[llvm] r287172 - [AVR] Add tests for counting leading/trailing zeros

[Dylan McKay via llvm-commits]

Author: dylanmckay
Date: Wed Nov 16 16:38:43 2016
New Revision: 287172

URL: http://llvm.org/viewvc/llvm-project?rev=287172&view=rev
Log:
[AVR] Add tests for counting leading/trailing zeros

This adds two test files that verify the 'cttz' and 'ctlz' operations.

Added:
    llvm/trunk/test/CodeGen/AVR/ctlz.ll
    llvm/trunk/test/CodeGen/AVR/cttz.ll

Added: llvm/trunk/test/CodeGen/AVR/ctlz.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AVR/ctlz.ll?rev=287172&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/AVR/ctlz.ll (added)
+++ llvm/trunk/test/CodeGen/AVR/ctlz.ll Wed Nov 16 16:38:43 2016
@@ -0,0 +1,48 @@
+; RUN: llc < %s -march=avr | FileCheck %s
+
+define i8 @count_leading_zeros(i8) unnamed_addr {
+entry-block:
+  %1 = tail call i8 @llvm.ctlz.i8(i8 %0)
+  ret i8 %1
+}
+
+declare i8 @llvm.ctlz.i8(i8)
+
+; CHECK-LABEL: count_leading_zeros:
+; CHECK: cpi    [[RESULT:r[0-9]+]], 0
+; CHECK: breq   LBB0_2
+; CHECK: mov    [[SCRATCH:r[0-9]+]], {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: or     {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: or     {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: mov    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: or     {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: com    {{.*}}[[SCRATCH]]
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: andi   {{.*}}[[RESULT]], 85
+; CHECK: sub    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: andi   {{.*}}[[RESULT]], 51
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: andi   {{.*}}[[SCRATCH]], 51
+; CHECK: add    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: add    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: andi   {{.*}}[[RESULT]], 15
+; CHECK: ret
+; CHECK: LBB0_2:
+; CHECK: ldi    {{.*}}[[RESULT]], 8
+; CHECK: ret

Added: llvm/trunk/test/CodeGen/AVR/cttz.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AVR/cttz.ll?rev=287172&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/AVR/cttz.ll (added)
+++ llvm/trunk/test/CodeGen/AVR/cttz.ll Wed Nov 16 16:38:43 2016
@@ -0,0 +1,40 @@
+; RUN: llc < %s -march=avr | FileCheck %s
+
+define i8 @count_trailing_zeros(i8) unnamed_addr {
+entry-block:
+  %1 = tail call i8 @llvm.cttz.i8(i8 %0)
+  ret i8 %1
+}
+
+declare i8 @llvm.cttz.i8(i8)
+
+; CHECK-LABEL: count_trailing_zeros:
+; CHECK: cpi    [[RESULT:r[0-9]+]], 0
+; CHECK: breq   LBB0_2
+; CHECK: mov    [[SCRATCH:r[0-9]+]], {{.*}}[[RESULT]]
+; CHECK: dec    {{.*}}[[SCRATCH]]
+; CHECK: com    {{.*}}[[RESULT]]
+; CHECK: and    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: mov    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: andi   {{.*}}[[SCRATCH]], 85
+; CHECK: sub    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: mov    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: andi   {{.*}}[[SCRATCH]], 51
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[RESULT]]
+; CHECK: andi   {{.*}}[[RESULT]], 51
+; CHECK: add    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: mov    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: lsr    {{.*}}[[SCRATCH]]
+; CHECK: add    {{.*}}[[SCRATCH]], {{.*}}[[RESULT]]
+; CHECK: andi   {{.*}}[[SCRATCH]], 15
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: ret
+; CHECK: LBB0_2:
+; CHECK: ldi    {{.*}}[[SCRATCH]], 8
+; CHECK: mov    {{.*}}[[RESULT]], {{.*}}[[SCRATCH]]
+; CHECK: ret