Index: lib/Transforms/Vectorize/SLPVectorizer.cpp =================================================================== --- lib/Transforms/Vectorize/SLPVectorizer.cpp +++ lib/Transforms/Vectorize/SLPVectorizer.cpp @@ -3643,6 +3643,8 @@ auto &Locs = ExternallyUsedValues[Scalar]; ExternallyUsedValues.insert({Ex, Locs}); ExternallyUsedValues.erase(Scalar); + // Required to update internally referenced instructions. + Scalar->replaceAllUsesWith(Ex); continue; } Index: test/Transforms/SLPVectorizer/X86/PR39774.ll =================================================================== --- test/Transforms/SLPVectorizer/X86/PR39774.ll +++ test/Transforms/SLPVectorizer/X86/PR39774.ll @@ -1,5 +1,6 @@ ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake -slp-threshold=-7 | FileCheck %s +; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake -slp-threshold=-8 -slp-min-tree-size=6 | FileCheck %s --check-prefix=FORCE_REDUCTION define void @Test(i32) { ; CHECK-LABEL: @Test( @@ -54,6 +55,94 @@ ; CHECK-NEXT: [[VAL_43]] = add i32 [[LOCAL_8_43_US]], 14910 ; CHECK-NEXT: br label [[LOOP]] ; +; FORCE_REDUCTION-LABEL: @Test( +; FORCE_REDUCTION-NEXT: entry: +; FORCE_REDUCTION-NEXT: br label [[LOOP:%.*]] +; FORCE_REDUCTION: loop: +; FORCE_REDUCTION-NEXT: [[TMP1:%.*]] = phi <2 x i32> [ [[TMP11:%.*]], [[LOOP]] ], [ zeroinitializer, [[ENTRY:%.*]] ] +; FORCE_REDUCTION-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> undef, <8 x i32> +; FORCE_REDUCTION-NEXT: [[TMP2:%.*]] = extractelement <8 x i32> [[SHUFFLE]], i32 1 +; FORCE_REDUCTION-NEXT: [[TMP3:%.*]] = add <8 x i32> , [[SHUFFLE]] +; FORCE_REDUCTION-NEXT: [[VAL_1:%.*]] = and i32 [[TMP2]], undef +; FORCE_REDUCTION-NEXT: [[VAL_2:%.*]] = and i32 [[VAL_1]], [[TMP0:%.*]] +; FORCE_REDUCTION-NEXT: [[VAL_3:%.*]] = and i32 [[VAL_2]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_4:%.*]] = and i32 [[VAL_3]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_5:%.*]] = and i32 [[VAL_4]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_7:%.*]] = and i32 [[VAL_5]], undef +; FORCE_REDUCTION-NEXT: [[VAL_8:%.*]] = and i32 [[VAL_7]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_9:%.*]] = and i32 [[VAL_8]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_10:%.*]] = and i32 [[VAL_9]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_12:%.*]] = and i32 [[VAL_10]], undef +; FORCE_REDUCTION-NEXT: [[VAL_13:%.*]] = and i32 [[VAL_12]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_14:%.*]] = and i32 [[VAL_13]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_15:%.*]] = and i32 [[VAL_14]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_16:%.*]] = and i32 [[VAL_15]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_17:%.*]] = and i32 [[VAL_16]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_19:%.*]] = and i32 [[VAL_17]], undef +; FORCE_REDUCTION-NEXT: [[VAL_21:%.*]] = and i32 [[VAL_19]], undef +; FORCE_REDUCTION-NEXT: [[VAL_22:%.*]] = and i32 [[VAL_21]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_23:%.*]] = and i32 [[VAL_22]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_24:%.*]] = and i32 [[VAL_23]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_25:%.*]] = and i32 [[VAL_24]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_26:%.*]] = and i32 [[VAL_25]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_27:%.*]] = and i32 [[VAL_26]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_28:%.*]] = and i32 [[VAL_27]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_29:%.*]] = and i32 [[VAL_28]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_30:%.*]] = and i32 [[VAL_29]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_31:%.*]] = and i32 [[VAL_30]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_32:%.*]] = and i32 [[VAL_31]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_33:%.*]] = and i32 [[VAL_32]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_35:%.*]] = and i32 [[VAL_33]], undef +; FORCE_REDUCTION-NEXT: [[VAL_36:%.*]] = and i32 [[VAL_35]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_37:%.*]] = and i32 [[VAL_36]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_38:%.*]] = and i32 [[VAL_37]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[VAL_40:%.*]] = and i32 [[VAL_38]], undef +; FORCE_REDUCTION-NEXT: [[TMP4:%.*]] = insertelement <2 x i32> undef, i32 [[VAL_40]], i32 0 +; FORCE_REDUCTION-NEXT: [[TMP5:%.*]] = insertelement <2 x i32> [[TMP4]], i32 [[TMP2]], i32 1 +; FORCE_REDUCTION-NEXT: [[TMP6:%.*]] = extractelement <8 x i32> [[TMP3]], i32 7 +; FORCE_REDUCTION-NEXT: [[TMP7:%.*]] = insertelement <2 x i32> undef, i32 [[TMP6]], i32 0 +; FORCE_REDUCTION-NEXT: [[TMP8:%.*]] = insertelement <2 x i32> [[TMP7]], i32 14910, i32 1 +; FORCE_REDUCTION-NEXT: [[TMP9:%.*]] = and <2 x i32> [[TMP5]], [[TMP8]] +; FORCE_REDUCTION-NEXT: [[TMP10:%.*]] = add <2 x i32> [[TMP5]], [[TMP8]] +; FORCE_REDUCTION-NEXT: [[TMP11]] = shufflevector <2 x i32> [[TMP9]], <2 x i32> [[TMP10]], <2 x i32> +; FORCE_REDUCTION-NEXT: [[RDX_SHUF:%.*]] = shufflevector <8 x i32> [[TMP3]], <8 x i32> undef, <8 x i32> +; FORCE_REDUCTION-NEXT: [[BIN_RDX:%.*]] = and <8 x i32> [[TMP3]], [[RDX_SHUF]] +; FORCE_REDUCTION-NEXT: [[RDX_SHUF1:%.*]] = shufflevector <8 x i32> [[BIN_RDX]], <8 x i32> undef, <8 x i32> +; FORCE_REDUCTION-NEXT: [[BIN_RDX2:%.*]] = and <8 x i32> [[BIN_RDX]], [[RDX_SHUF1]] +; FORCE_REDUCTION-NEXT: [[RDX_SHUF3:%.*]] = shufflevector <8 x i32> [[BIN_RDX2]], <8 x i32> undef, <8 x i32> +; FORCE_REDUCTION-NEXT: [[BIN_RDX4:%.*]] = and <8 x i32> [[BIN_RDX2]], [[RDX_SHUF3]] +; FORCE_REDUCTION-NEXT: [[TMP12:%.*]] = extractelement <8 x i32> [[BIN_RDX4]], i32 0 +; FORCE_REDUCTION-NEXT: [[OP_EXTRA:%.*]] = and i32 [[TMP12]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA5:%.*]] = and i32 [[OP_EXTRA]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA6:%.*]] = and i32 [[OP_EXTRA5]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA7:%.*]] = and i32 [[OP_EXTRA6]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA8:%.*]] = and i32 [[OP_EXTRA7]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA9:%.*]] = and i32 [[OP_EXTRA8]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA10:%.*]] = and i32 [[OP_EXTRA9]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA11:%.*]] = and i32 [[OP_EXTRA10]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA12:%.*]] = and i32 [[OP_EXTRA11]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA13:%.*]] = and i32 [[OP_EXTRA12]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA14:%.*]] = and i32 [[OP_EXTRA13]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA15:%.*]] = and i32 [[OP_EXTRA14]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA16:%.*]] = and i32 [[OP_EXTRA15]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA17:%.*]] = and i32 [[OP_EXTRA16]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA18:%.*]] = and i32 [[OP_EXTRA17]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA19:%.*]] = and i32 [[OP_EXTRA18]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA20:%.*]] = and i32 [[OP_EXTRA19]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA21:%.*]] = and i32 [[OP_EXTRA20]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA22:%.*]] = and i32 [[OP_EXTRA21]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA23:%.*]] = and i32 [[OP_EXTRA22]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA24:%.*]] = and i32 [[OP_EXTRA23]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA25:%.*]] = and i32 [[OP_EXTRA24]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA26:%.*]] = and i32 [[OP_EXTRA25]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA27:%.*]] = and i32 [[OP_EXTRA26]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA28:%.*]] = and i32 [[OP_EXTRA27]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA29:%.*]] = and i32 [[OP_EXTRA28]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA30:%.*]] = and i32 [[OP_EXTRA29]], [[TMP0]] +; FORCE_REDUCTION-NEXT: [[OP_EXTRA31:%.*]] = and i32 [[OP_EXTRA30]], [[TMP2]] +; FORCE_REDUCTION-NEXT: [[TMP13:%.*]] = extractelement <2 x i32> [[TMP11]], i32 0 +; FORCE_REDUCTION-NEXT: br label [[LOOP]] +; entry: br label %loop