[llvm-commits] [llvm] r130858 - in /llvm/trunk/test/CodeGen/Thumb2: thumb2-cmn.ll thumb2-cmp.ll thumb2-cmp2.ll thumb2-teq.ll thumb2-teq2.ll thumb2-tst.ll thumb2-tst2.ll
Jakob Stoklund Olesen
stoklund at 2pi.dk
Wed May 4 12:02:07 PDT 2011
Author: stoklund
Date: Wed May 4 14:02:07 2011
New Revision: 130858
URL: http://llvm.org/viewvc/llvm-project?rev=130858&view=rev
Log:
Explicitly request physreg coalesing for a bunch of Thumb2 unit tests.
These tests all follow the same pattern:
mov r2, r0
movs r0, #0
$CMP r2, r1
it eq
moveq r0, #1
bx lr
The first 'mov' can be eliminated by rematerializing 'movs r0, #0' below the
test instruction:
$CMP r0, r1
mov.w r0, #0
it eq
moveq r0, #1
bx lr
So far, only physreg coalescing can do that. The register allocators won't yet
split live ranges just to eliminate copies. They can learn, but this particular
problem is not likely to show up in real code. It only appears because r0 is
used for both the function argument and return value.
Modified:
llvm/trunk/test/CodeGen/Thumb2/thumb2-cmn.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp2.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-teq.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-teq2.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-tst.ll
llvm/trunk/test/CodeGen/Thumb2/thumb2-tst2.ll
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-cmn.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-cmn.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-cmn.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-cmn.ll Wed May 4 14:02:07 2011
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; test as 'mov.w r0, #0'. So far, that requires physreg joining.
define i1 @f1(i32 %a, i32 %b) {
%nb = sub i32 0, %b
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp.ll Wed May 4 14:02:07 2011
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; test as 'mov.w r0, #0'. So far, that requires physreg joining.
; 0x000000bb = 187
define i1 @f1(i32 %a) {
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp2.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp2.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-cmp2.ll Wed May 4 14:02:07 2011
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; test as 'mov.w r0, #0'. So far, that requires physreg joining.
define i1 @f1(i32 %a, i32 %b) {
; CHECK: f1:
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-teq.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-teq.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-teq.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-teq.ll Wed May 4 14:02:07 2011
@@ -1,5 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; test as 'mov.w r0, #0'. So far, that requires physreg joining.
; 0x000000bb = 187
define i1 @f1(i32 %a) {
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-teq2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-teq2.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-teq2.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-teq2.ll Wed May 4 14:02:07 2011
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; tst as 'mov.w r0, #0'. So far, that requires physreg joining.
define i1 @f1(i32 %a, i32 %b) {
; CHECK: f1
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-tst.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-tst.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-tst.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-tst.ll Wed May 4 14:02:07 2011
@@ -1,5 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; tst as 'mov.w r0, #0'. So far, that requires physreg joining.
; 0x000000bb = 187
define i1 @f1(i32 %a) {
Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-tst2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-tst2.ll?rev=130858&r1=130857&r2=130858&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-tst2.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-tst2.ll Wed May 4 14:02:07 2011
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
+; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
+
+; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
+; tst as 'mov.w r0, #0'. So far, that requires physreg joining.
define i1 @f1(i32 %a, i32 %b) {
; CHECK: f1:
More information about the llvm-commits
mailing list