diff options
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll | 45 |
1 files changed, 9 insertions, 36 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll b/llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll index 25e164fc1c9..07eb4cbcbc0 100644 --- a/llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll +++ b/llvm/test/Transforms/LoopVectorize/X86/imprecise-through-phis.ll @@ -1,11 +1,14 @@ ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -loop-vectorize -mtriple=x86_64-apple-darwin %s | FileCheck %s +; FIXME: The intent is that we should be able to vectorize this on x86 +; because that would be profitable, but the cost model says it is not. + ; Two mostly identical functions. The only difference is the presence of ; fast-math flags on the second. The loop is a pretty simple reduction: ; for (int i = 0; i < 32; ++i) -; if (arr[i] != 42) +; if (arr[i] != 42.0) ; tot += arr[i]; define double @sumIfScalar(double* nocapture readonly %arr) { @@ -66,41 +69,11 @@ done: define double @sumIfVector(double* nocapture readonly %arr) { ; CHECK-LABEL: @sumIfVector( ; CHECK-NEXT: entry: -; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] -; CHECK: vector.ph: -; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] -; CHECK: vector.body: -; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] -; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <2 x double> [ zeroinitializer, [[VECTOR_PH]] ], [ [[PREDPHI:%.*]], [[VECTOR_BODY]] ] -; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i32> undef, i32 [[INDEX]], i32 0 -; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i32> [[BROADCAST_SPLATINSERT]], <2 x i32> undef, <2 x i32> zeroinitializer -; CHECK-NEXT: [[INDUCTION:%.*]] = add <2 x i32> [[BROADCAST_SPLAT]], <i32 0, i32 1> -; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[INDEX]], 0 -; CHECK-NEXT: [[TMP1:%.*]] = getelementptr double, double* [[ARR:%.*]], i32 [[TMP0]] -; CHECK-NEXT: [[TMP2:%.*]] = getelementptr double, double* [[TMP1]], i32 0 -; CHECK-NEXT: [[TMP3:%.*]] = bitcast double* [[TMP2]] to <2 x double>* -; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x double>, <2 x double>* [[TMP3]], align 8 -; CHECK-NEXT: [[TMP4:%.*]] = fcmp fast une <2 x double> [[WIDE_LOAD]], <double 4.200000e+01, double 4.200000e+01> -; CHECK-NEXT: [[TMP5:%.*]] = fadd fast <2 x double> [[VEC_PHI]], [[WIDE_LOAD]] -; CHECK-NEXT: [[TMP6:%.*]] = xor <2 x i1> [[TMP4]], <i1 true, i1 true> -; CHECK-NEXT: [[PREDPHI]] = select <2 x i1> [[TMP4]], <2 x double> [[TMP5]], <2 x double> [[VEC_PHI]] -; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 2 -; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i32 [[INDEX_NEXT]], 32 -; CHECK-NEXT: br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0 -; CHECK: middle.block: -; CHECK-NEXT: [[RDX_SHUF:%.*]] = shufflevector <2 x double> [[PREDPHI]], <2 x double> undef, <2 x i32> <i32 1, i32 undef> -; CHECK-NEXT: [[BIN_RDX:%.*]] = fadd fast <2 x double> [[PREDPHI]], [[RDX_SHUF]] -; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x double> [[BIN_RDX]], i32 0 -; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 32, 32 -; CHECK-NEXT: br i1 [[CMP_N]], label [[DONE:%.*]], label [[SCALAR_PH]] -; CHECK: scalar.ph: -; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ 32, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] -; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi double [ 0.000000e+00, [[ENTRY]] ], [ [[TMP8]], [[MIDDLE_BLOCK]] ] ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: -; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[I_NEXT:%.*]], [[NEXT_ITER:%.*]] ] -; CHECK-NEXT: [[TOT:%.*]] = phi double [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[TOT_NEXT:%.*]], [[NEXT_ITER]] ] -; CHECK-NEXT: [[ADDR:%.*]] = getelementptr double, double* [[ARR]], i32 [[I]] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[NEXT_ITER:%.*]] ] +; CHECK-NEXT: [[TOT:%.*]] = phi double [ 0.000000e+00, [[ENTRY]] ], [ [[TOT_NEXT:%.*]], [[NEXT_ITER]] ] +; CHECK-NEXT: [[ADDR:%.*]] = getelementptr double, double* [[ARR:%.*]], i32 [[I]] ; CHECK-NEXT: [[NEXTVAL:%.*]] = load double, double* [[ADDR]] ; CHECK-NEXT: [[TST:%.*]] = fcmp fast une double [[NEXTVAL]], 4.200000e+01 ; CHECK-NEXT: br i1 [[TST]], label [[DO_ADD:%.*]], label [[NO_ADD:%.*]] @@ -113,9 +86,9 @@ define double @sumIfVector(double* nocapture readonly %arr) { ; CHECK-NEXT: [[TOT_NEXT]] = phi double [ [[TOT]], [[NO_ADD]] ], [ [[TOT_NEW]], [[DO_ADD]] ] ; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 ; CHECK-NEXT: [[AGAIN:%.*]] = icmp ult i32 [[I_NEXT]], 32 -; CHECK-NEXT: br i1 [[AGAIN]], label [[LOOP]], label [[DONE]], !llvm.loop !2 +; CHECK-NEXT: br i1 [[AGAIN]], label [[LOOP]], label [[DONE:%.*]] ; CHECK: done: -; CHECK-NEXT: [[TOT_NEXT_LCSSA:%.*]] = phi double [ [[TOT_NEXT]], [[NEXT_ITER]] ], [ [[TMP8]], [[MIDDLE_BLOCK]] ] +; CHECK-NEXT: [[TOT_NEXT_LCSSA:%.*]] = phi double [ [[TOT_NEXT]], [[NEXT_ITER]] ] ; CHECK-NEXT: ret double [[TOT_NEXT_LCSSA]] ; entry: |
