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Diffstat (limited to 'llvm/test/Transforms/InstCombine/pr17827.ll')
-rw-r--r-- | llvm/test/Transforms/InstCombine/pr17827.ll | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/llvm/test/Transforms/InstCombine/pr17827.ll b/llvm/test/Transforms/InstCombine/pr17827.ll deleted file mode 100644 index e9312fceeda..00000000000 --- a/llvm/test/Transforms/InstCombine/pr17827.ll +++ /dev/null @@ -1,115 +0,0 @@ -; NOTE: Assertions have been autogenerated by utils/update_test_checks.py -; RUN: opt < %s -instcombine -S | FileCheck %s - -; With left shift, the comparison should not be modified. -define i1 @test_shift_and_cmp_not_changed1(i8 %p) { -; CHECK-LABEL: @test_shift_and_cmp_not_changed1( -; CHECK-NEXT: [[SHLP:%.*]] = shl i8 %p, 5 -; CHECK-NEXT: [[ANDP:%.*]] = and i8 [[SHLP]], -64 -; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[ANDP]], 32 -; CHECK-NEXT: ret i1 [[CMP]] -; - %shlp = shl i8 %p, 5 - %andp = and i8 %shlp, -64 - %cmp = icmp slt i8 %andp, 32 - ret i1 %cmp -} - -; With arithmetic right shift, the comparison should not be modified. -define i1 @test_shift_and_cmp_not_changed2(i8 %p) { -; CHECK-LABEL: @test_shift_and_cmp_not_changed2( -; CHECK-NEXT: [[SHLP:%.*]] = ashr i8 %p, 5 -; CHECK-NEXT: [[ANDP:%.*]] = and i8 [[SHLP]], -64 -; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[ANDP]], 32 -; CHECK-NEXT: ret i1 [[CMP]] -; - %shlp = ashr i8 %p, 5 - %andp = and i8 %shlp, -64 - %cmp = icmp slt i8 %andp, 32 - ret i1 %cmp -} - -; This should simplify functionally to the left shift case. -; The extra input parameter should be optimized away. -define i1 @test_shift_and_cmp_changed1(i8 %p, i8 %q) { -; CHECK-LABEL: @test_shift_and_cmp_changed1( -; CHECK-NEXT: [[ANDP:%.*]] = shl i8 %p, 5 -; CHECK-NEXT: [[SHL:%.*]] = and i8 [[ANDP]], -64 -; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[SHL]], 32 -; CHECK-NEXT: ret i1 [[CMP]] -; - %andp = and i8 %p, 6 - %andq = and i8 %q, 8 - %or = or i8 %andq, %andp - %shl = shl i8 %or, 5 - %ashr = ashr i8 %shl, 5 - %cmp = icmp slt i8 %ashr, 1 - ret i1 %cmp -} - -define <2 x i1> @test_shift_and_cmp_changed1_vec(<2 x i8> %p, <2 x i8> %q) { -; CHECK-LABEL: @test_shift_and_cmp_changed1_vec( -; CHECK-NEXT: [[ANDP:%.*]] = shl <2 x i8> [[P:%.*]], <i8 5, i8 5> -; CHECK-NEXT: [[SHL:%.*]] = and <2 x i8> [[ANDP]], <i8 -64, i8 -64> -; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> [[SHL]], <i8 32, i8 32> -; CHECK-NEXT: ret <2 x i1> [[CMP]] -; - %andp = and <2 x i8> %p, <i8 6, i8 6> - %andq = and <2 x i8> %q, <i8 8, i8 8> - %or = or <2 x i8> %andq, %andp - %shl = shl <2 x i8> %or, <i8 5, i8 5> - %ashr = ashr <2 x i8> %shl, <i8 5, i8 5> - %cmp = icmp slt <2 x i8> %ashr, <i8 1, i8 1> - ret <2 x i1> %cmp -} - -; Unsigned compare allows a transformation to compare against 0. -define i1 @test_shift_and_cmp_changed2(i8 %p) { -; CHECK-LABEL: @test_shift_and_cmp_changed2( -; CHECK-NEXT: [[ANDP:%.*]] = and i8 %p, 6 -; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[ANDP]], 0 -; CHECK-NEXT: ret i1 [[CMP]] -; - %shlp = shl i8 %p, 5 - %andp = and i8 %shlp, -64 - %cmp = icmp ult i8 %andp, 32 - ret i1 %cmp -} - -define <2 x i1> @test_shift_and_cmp_changed2_vec(<2 x i8> %p) { -; CHECK-LABEL: @test_shift_and_cmp_changed2_vec( -; CHECK-NEXT: [[ANDP:%.*]] = and <2 x i8> %p, <i8 6, i8 6> -; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i8> [[ANDP]], zeroinitializer -; CHECK-NEXT: ret <2 x i1> [[CMP]] -; - %shlp = shl <2 x i8> %p, <i8 5, i8 5> - %andp = and <2 x i8> %shlp, <i8 -64, i8 -64> - %cmp = icmp ult <2 x i8> %andp, <i8 32, i8 32> - ret <2 x i1> %cmp -} - -; nsw on the shift should not affect the comparison. -define i1 @test_shift_and_cmp_changed3(i8 %p) { -; CHECK-LABEL: @test_shift_and_cmp_changed3( -; CHECK-NEXT: [[SHLP:%.*]] = shl nsw i8 %p, 5 -; CHECK-NEXT: [[ANDP:%.*]] = and i8 [[SHLP]], -64 -; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[ANDP]], 32 -; CHECK-NEXT: ret i1 [[CMP]] -; - %shlp = shl nsw i8 %p, 5 - %andp = and i8 %shlp, -64 - %cmp = icmp slt i8 %andp, 32 - ret i1 %cmp -} - -; Logical shift right allows a return true because the 'and' guarantees no bits are set. -define i1 @test_shift_and_cmp_changed4(i8 %p) { -; CHECK-LABEL: @test_shift_and_cmp_changed4( -; CHECK-NEXT: ret i1 true -; - %shlp = lshr i8 %p, 5 - %andp = and i8 %shlp, -64 - %cmp = icmp slt i8 %andp, 32 - ret i1 %cmp -} - |