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author | Dinesh Dwivedi <dinesh.d@samsung.com> | 2014-06-02 07:24:36 +0000 |
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committer | Dinesh Dwivedi <dinesh.d@samsung.com> | 2014-06-02 07:24:36 +0000 |
commit | c469e543a02de7c87b6aa906d91e480ed249d8ac (patch) | |
tree | 14d1bbbc14da5b4f08c7ed74f6b7fe8ee1feeb83 /test | |
parent | 01fa655228c1e8460e1aaf23bc80cb669b1cefaa (diff) | |
download | llvm-c469e543a02de7c87b6aa906d91e480ed249d8ac.tar.gz llvm-c469e543a02de7c87b6aa906d91e480ed249d8ac.tar.bz2 llvm-c469e543a02de7c87b6aa906d91e480ed249d8ac.tar.xz |
Added inst combine transforms for single bit tests from Chris's note
if ((x & C) == 0) x |= C becomes x |= C
if ((x & C) != 0) x ^= C becomes x &= ~C
if ((x & C) == 0) x ^= C becomes x |= C
if ((x & C) != 0) x &= ~C becomes x &= ~C
if ((x & C) == 0) x &= ~C becomes nothing
Differential Revision: http://reviews.llvm.org/D3777
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210006 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/Transforms/InstCombine/select.ll | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/select.ll b/test/Transforms/InstCombine/select.ll index 2213be1f51..23a891a7b2 100644 --- a/test/Transforms/InstCombine/select.ll +++ b/test/Transforms/InstCombine/select.ll @@ -996,6 +996,111 @@ define <2 x i32> @select_icmp_eq_and_1_0_or_vector_of_2s(i32 %x, <2 x i32> %y) { ret <2 x i32> %select } +; CHECK-LABEL: @select_icmp_and_8_eq_0_or_8( +; CHECK-NEXT: [[OR:%[a-z0-9]+]] = or i32 %x, 8 +; CHECK-NEXT: ret i32 [[OR]] +define i32 @select_icmp_and_8_eq_0_or_8(i32 %x) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %or = or i32 %x, 8 + %or.x = select i1 %cmp, i32 %or, i32 %x + ret i32 %or.x +} + +; CHECK-LABEL: @select_icmp_and_8_ne_0_xor_8( +; CHECK-NEXT: [[AND:%[a-z0-9]+]] = and i32 %x, -9 +; CHECK-NEXT: ret i32 [[AND]] +define i32 @select_icmp_and_8_ne_0_xor_8(i32 %x) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %xor = xor i32 %x, 8 + %x.xor = select i1 %cmp, i32 %x, i32 %xor + ret i32 %x.xor +} + +; CHECK-LABEL: @select_icmp_and_8_eq_0_xor_8( +; CHECK-NEXT: [[OR:%[a-z0-9]+]] = or i32 %x, 8 +; CHECK-NEXT: ret i32 [[OR]] +define i32 @select_icmp_and_8_eq_0_xor_8(i32 %x) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %xor = xor i32 %x, 8 + %xor.x = select i1 %cmp, i32 %xor, i32 %x + ret i32 %xor.x +} + +; CHECK-LABEL: @select_icmp_and_8_ne_0_and_not_8( +; CHECK-NEXT: [[AND:%[a-z0-9]+]] = and i32 %x, -9 +; CHECK-NEXT: ret i32 [[AND]] +define i32 @select_icmp_and_8_ne_0_and_not_8(i32 %x) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %and1 = and i32 %x, -9 + %x.and1 = select i1 %cmp, i32 %x, i32 %and1 + ret i32 %x.and1 +} + +; CHECK-LABEL: @select_icmp_and_8_eq_0_and_not_8( +; CHECK-NEXT: ret i32 %x +define i32 @select_icmp_and_8_eq_0_and_not_8(i32 %x) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %and1 = and i32 %x, -9 + %and1.x = select i1 %cmp, i32 %and1, i32 %x + ret i32 %and1.x +} + +; CHECK-LABEL: @select_icmp_x_and_8_eq_0_y_xor_8( +; CHECK: select i1 %cmp, i64 %y, i64 %xor +define i64 @select_icmp_x_and_8_eq_0_y_xor_8(i32 %x, i64 %y) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %xor = xor i64 %y, 8 + %y.xor = select i1 %cmp, i64 %y, i64 %xor + ret i64 %y.xor +} + +; CHECK-LABEL: @select_icmp_x_and_8_eq_0_y_and_not_8( +; CHECK: select i1 %cmp, i64 %y, i64 %and1 +define i64 @select_icmp_x_and_8_eq_0_y_and_not_8(i32 %x, i64 %y) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %and1 = and i64 %y, -9 + %y.and1 = select i1 %cmp, i64 %y, i64 %and1 + ret i64 %y.and1 +} + +; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y_xor_8( +; CHECK: select i1 %cmp, i64 %xor, i64 %y +define i64 @select_icmp_x_and_8_ne_0_y_xor_8(i32 %x, i64 %y) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %xor = xor i64 %y, 8 + %xor.y = select i1 %cmp, i64 %xor, i64 %y + ret i64 %xor.y +} + +; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y_and_not_8( +; CHECK: select i1 %cmp, i64 %and1, i64 %y +define i64 @select_icmp_x_and_8_ne_0_y_and_not_8(i32 %x, i64 %y) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %and1 = and i64 %y, -9 + %and1.y = select i1 %cmp, i64 %and1, i64 %y + ret i64 %and1.y +} + +; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y_or_8( +; CHECK: xor i64 %1, 8 +; CHECK: or i64 %2, %y +define i64 @select_icmp_x_and_8_ne_0_y_or_8(i32 %x, i64 %y) { + %and = and i32 %x, 8 + %cmp = icmp eq i32 %and, 0 + %or = or i64 %y, 8 + %or.y = select i1 %cmp, i64 %or, i64 %y + ret i64 %or.y +} + define i32 @test65(i64 %x) { %1 = and i64 %x, 16 %2 = icmp ne i64 %1, 0 |