[ARM] Swap cmp operands for automatic shifts

Swap the compare operands if the lhs is a shift and the rhs isn't,
as in arm and T2 the shift can be performed by the compare for its
second operand.

Differential Revision: https://reviews.llvm.org/D39004

llvm-svn: 316562

1 files changed, 0 insertions, 52 deletions

diff --git a/llvm/test/CodeGen/Thumb2/thumb2-cmp2.ll b/llvm/test/CodeGen/Thumb2/thumb2-cmp2.ll
deleted file mode 100644
index 4d840030f82..00000000000
--- a/llvm/test/CodeGen/Thumb2/thumb2-cmp2.ll
+++ /dev/null
@@ -1,52 +0,0 @@
-; RUN: llc -mtriple=thumb-eabi -mcpu=arm1156t2-s -mattr=+thumb2 %s -o - | FileCheck %s
-
-; These tests would be improved by 'movs r0, #0' being rematerialized below the
-; test as 'mov.w r0, #0'.
-
-define i1 @f1(i32 %a, i32 %b) {
-; CHECK-LABEL: f1:
-; CHECK: cmp {{.*}}, r1
-    %tmp = icmp ne i32 %a, %b
-    ret i1 %tmp
-}
-
-define i1 @f2(i32 %a, i32 %b) {
-; CHECK-LABEL: f2:
-; CHECK: cmp {{.*}}, r1
-    %tmp = icmp eq i32 %a, %b
-    ret i1 %tmp
-}
-
-define i1 @f6(i32 %a, i32 %b) {
-; CHECK-LABEL: f6:
-; CHECK: cmp.w {{.*}}, r1, lsl #5
-    %tmp = shl i32 %b, 5
-    %tmp1 = icmp eq i32 %tmp, %a
-    ret i1 %tmp1
-}
-
-define i1 @f7(i32 %a, i32 %b) {
-; CHECK-LABEL: f7:
-; CHECK: cmp.w {{.*}}, r1, lsr #6
-    %tmp = lshr i32 %b, 6
-    %tmp1 = icmp ne i32 %tmp, %a
-    ret i1 %tmp1
-}
-
-define i1 @f8(i32 %a, i32 %b) {
-; CHECK-LABEL: f8:
-; CHECK: cmp.w {{.*}}, r1, asr #7
-    %tmp = ashr i32 %b, 7
-    %tmp1 = icmp eq i32 %a, %tmp
-    ret i1 %tmp1
-}
-
-define i1 @f9(i32 %a, i32 %b) {
-; CHECK-LABEL: f9:
-; CHECK: cmp.w {{.*}}, {{.*}}, ror #8
-    %l8 = shl i32 %a, 24
-    %r8 = lshr i32 %a, 8
-    %tmp = or i32 %l8, %r8
-    %tmp1 = icmp ne i32 %a, %tmp
-    ret i1 %tmp1
-}