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clang-p2996/llvm/test/Transforms/SLPVectorizer/X86/phi.ll
Juneyoung Lee 4a8e6ed2f7 [SLP,LV] Use poison constant vector for shufflevector/initial insertelement 
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef.
This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector.
The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ).

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D94061
2021-01-06 11:22:50 +09:00

342 lines
16 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basic-aa -slp-vectorizer -slp-threshold=-100 -dce -S -mtriple=i386-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.9.0"
;int foo(double *A, int k) {
; double A0;
; double A1;
; if (k) {
; A0 = 3;
; A1 = 5;
; } else {
; A0 = A[10];
; A1 = A[11];
; }
; A[0] = A0;
; A[1] = A1;
;}
define i32 @foo(double* nocapture %A, i32 %k) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[K:%.*]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_ELSE:%.*]], label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds double, double* [[A:%.*]], i64 10
; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[ARRAYIDX]] to <2 x double>*
; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMP2:%.*]] = phi <2 x double> [ [[TMP1]], [[IF_ELSE]] ], [ <double 3.000000e+00, double 5.000000e+00>, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[TMP3:%.*]] = bitcast double* [[A]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP2]], <2 x double>* [[TMP3]], align 8
; CHECK-NEXT: ret i32 undef
;
entry:
%tobool = icmp eq i32 %k, 0
br i1 %tobool, label %if.else, label %if.end
if.else: ; preds = %entry
%arrayidx = getelementptr inbounds double, double* %A, i64 10
%0 = load double, double* %arrayidx, align 8
%arrayidx1 = getelementptr inbounds double, double* %A, i64 11
%1 = load double, double* %arrayidx1, align 8
br label %if.end
if.end: ; preds = %entry, %if.else
%A0.0 = phi double [ %0, %if.else ], [ 3.000000e+00, %entry ]
%A1.0 = phi double [ %1, %if.else ], [ 5.000000e+00, %entry ]
store double %A0.0, double* %A, align 8
%arrayidx3 = getelementptr inbounds double, double* %A, i64 1
store double %A1.0, double* %arrayidx3, align 8
ret i32 undef
}
;int foo(double * restrict B, double * restrict A, int n, int m) {
; double R=A[1];
; double G=A[0];
; for (int i=0; i < 100; i++) {
; R += 10;
; G += 10;
; R *= 4;
; G *= 4;
; R += 4;
; G += 4;
; }
; B[0] = G;
; B[1] = R;
; return 0;
;}
define i32 @foo2(double* noalias nocapture %B, double* noalias nocapture %A, i32 %n, i32 %m) #0 {
; CHECK-LABEL: @foo2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[A:%.*]] to <2 x double>*
; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_019:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP2:%.*]] = phi <2 x double> [ [[TMP1]], [[ENTRY]] ], [ [[TMP5:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], <double 1.000000e+01, double 1.000000e+01>
; CHECK-NEXT: [[TMP4:%.*]] = fmul <2 x double> [[TMP3]], <double 4.000000e+00, double 4.000000e+00>
; CHECK-NEXT: [[TMP5]] = fadd <2 x double> [[TMP4]], <double 4.000000e+00, double 4.000000e+00>
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_019]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 100
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK: for.end:
; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[B:%.*]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 8
; CHECK-NEXT: ret i32 0
;
entry:
%arrayidx = getelementptr inbounds double, double* %A, i64 1
%0 = load double, double* %arrayidx, align 8
%1 = load double, double* %A, align 8
br label %for.body
for.body: ; preds = %for.body, %entry
%i.019 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%G.018 = phi double [ %1, %entry ], [ %add5, %for.body ]
%R.017 = phi double [ %0, %entry ], [ %add4, %for.body ]
%add = fadd double %R.017, 1.000000e+01
%add2 = fadd double %G.018, 1.000000e+01
%mul = fmul double %add, 4.000000e+00
%mul3 = fmul double %add2, 4.000000e+00
%add4 = fadd double %mul, 4.000000e+00
%add5 = fadd double %mul3, 4.000000e+00
%inc = add nsw i32 %i.019, 1
%exitcond = icmp eq i32 %inc, 100
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
store double %add5, double* %B, align 8
%arrayidx7 = getelementptr inbounds double, double* %B, i64 1
store double %add4, double* %arrayidx7, align 8
ret i32 0
}
; float foo3(float *A) {
;
; float R = A[0];
; float G = A[1];
; float B = A[2];
; float Y = A[3];
; float P = A[4];
; for (int i=0; i < 121; i+=3) {
; R+=A[i+0]*7;
; G+=A[i+1]*8;
; B+=A[i+2]*9;
; Y+=A[i+3]*10;
; P+=A[i+4]*11;
; }
;
; return R+G+B+Y+P;
; }
define float @foo3(float* nocapture readonly %A) #0 {
; CHECK-LABEL: @foo3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds float, float* [[A]], i64 1
; CHECK-NEXT: [[TMP1:%.*]] = bitcast float* [[ARRAYIDX1]] to <4 x float>*
; CHECK-NEXT: [[TMP2:%.*]] = load <4 x float>, <4 x float>* [[TMP1]], align 4
; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x float> [[TMP2]], <4 x float> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[TMP3:%.*]] = extractelement <4 x float> [[SHUFFLE]], i32 3
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[R_052:%.*]] = phi float [ [[TMP0]], [[ENTRY]] ], [ [[ADD6:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP4:%.*]] = phi float [ [[TMP3]], [[ENTRY]] ], [ [[TMP11:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP5:%.*]] = phi float [ [[TMP0]], [[ENTRY]] ], [ [[TMP13:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP6:%.*]] = phi <4 x float> [ [[SHUFFLE]], [[ENTRY]] ], [ [[TMP18:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[TMP5]], 7.000000e+00
; CHECK-NEXT: [[ADD6]] = fadd float [[R_052]], [[MUL]]
; CHECK-NEXT: [[TMP7:%.*]] = add nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT: [[ARRAYIDX14:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[TMP7]]
; CHECK-NEXT: [[TMP8:%.*]] = load float, float* [[ARRAYIDX14]], align 4
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 3
; CHECK-NEXT: [[ARRAYIDX19:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[TMP9:%.*]] = bitcast float* [[ARRAYIDX19]] to <2 x float>*
; CHECK-NEXT: [[TMP10:%.*]] = load <2 x float>, <2 x float>* [[TMP9]], align 4
; CHECK-NEXT: [[SHUFFLE1:%.*]] = shufflevector <2 x float> [[TMP10]], <2 x float> poison, <2 x i32> <i32 1, i32 0>
; CHECK-NEXT: [[TMP11]] = extractelement <2 x float> [[SHUFFLE1]], i32 0
; CHECK-NEXT: [[TMP12:%.*]] = insertelement <4 x float> poison, float [[TMP11]], i32 0
; CHECK-NEXT: [[TMP13]] = extractelement <2 x float> [[SHUFFLE1]], i32 1
; CHECK-NEXT: [[TMP14:%.*]] = insertelement <4 x float> [[TMP12]], float [[TMP13]], i32 1
; CHECK-NEXT: [[TMP15:%.*]] = insertelement <4 x float> [[TMP14]], float [[TMP8]], i32 2
; CHECK-NEXT: [[TMP16:%.*]] = insertelement <4 x float> [[TMP15]], float [[TMP4]], i32 3
; CHECK-NEXT: [[TMP17:%.*]] = fmul <4 x float> [[TMP16]], <float 1.100000e+01, float 1.000000e+01, float 9.000000e+00, float 8.000000e+00>
; CHECK-NEXT: [[TMP18]] = fadd <4 x float> [[TMP6]], [[TMP17]]
; CHECK-NEXT: [[TMP19:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[TMP19]], 121
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.end:
; CHECK-NEXT: [[TMP20:%.*]] = extractelement <4 x float> [[TMP18]], i32 3
; CHECK-NEXT: [[ADD28:%.*]] = fadd float [[ADD6]], [[TMP20]]
; CHECK-NEXT: [[TMP21:%.*]] = extractelement <4 x float> [[TMP18]], i32 2
; CHECK-NEXT: [[ADD29:%.*]] = fadd float [[ADD28]], [[TMP21]]
; CHECK-NEXT: [[TMP22:%.*]] = extractelement <4 x float> [[TMP18]], i32 1
; CHECK-NEXT: [[ADD30:%.*]] = fadd float [[ADD29]], [[TMP22]]
; CHECK-NEXT: [[TMP23:%.*]] = extractelement <4 x float> [[TMP18]], i32 0
; CHECK-NEXT: [[ADD31:%.*]] = fadd float [[ADD30]], [[TMP23]]
; CHECK-NEXT: ret float [[ADD31]]
;
entry:
%0 = load float, float* %A, align 4
%arrayidx1 = getelementptr inbounds float, float* %A, i64 1
%1 = load float, float* %arrayidx1, align 4
%arrayidx2 = getelementptr inbounds float, float* %A, i64 2
%2 = load float, float* %arrayidx2, align 4
%arrayidx3 = getelementptr inbounds float, float* %A, i64 3
%3 = load float, float* %arrayidx3, align 4
%arrayidx4 = getelementptr inbounds float, float* %A, i64 4
%4 = load float, float* %arrayidx4, align 4
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%P.056 = phi float [ %4, %entry ], [ %add26, %for.body ]
%Y.055 = phi float [ %3, %entry ], [ %add21, %for.body ]
%B.054 = phi float [ %2, %entry ], [ %add16, %for.body ]
%G.053 = phi float [ %1, %entry ], [ %add11, %for.body ]
%R.052 = phi float [ %0, %entry ], [ %add6, %for.body ]
%5 = phi float [ %1, %entry ], [ %11, %for.body ]
%6 = phi float [ %0, %entry ], [ %9, %for.body ]
%mul = fmul float %6, 7.000000e+00
%add6 = fadd float %R.052, %mul
%mul10 = fmul float %5, 8.000000e+00
%add11 = fadd float %G.053, %mul10
%7 = add nsw i64 %indvars.iv, 2
%arrayidx14 = getelementptr inbounds float, float* %A, i64 %7
%8 = load float, float* %arrayidx14, align 4
%mul15 = fmul float %8, 9.000000e+00
%add16 = fadd float %B.054, %mul15
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 3
%arrayidx19 = getelementptr inbounds float, float* %A, i64 %indvars.iv.next
%9 = load float, float* %arrayidx19, align 4
%mul20 = fmul float %9, 1.000000e+01
%add21 = fadd float %Y.055, %mul20
%10 = add nsw i64 %indvars.iv, 4
%arrayidx24 = getelementptr inbounds float, float* %A, i64 %10
%11 = load float, float* %arrayidx24, align 4
%mul25 = fmul float %11, 1.100000e+01
%add26 = fadd float %P.056, %mul25
%12 = trunc i64 %indvars.iv.next to i32
%cmp = icmp slt i32 %12, 121
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
%add28 = fadd float %add6, %add11
%add29 = fadd float %add28, %add16
%add30 = fadd float %add29, %add21
%add31 = fadd float %add30, %add26
ret float %add31
}
; Make sure the order of phi nodes of different types does not prevent
; vectorization of same typed phi nodes.
define float @sort_phi_type(float* nocapture readonly %A) {
; CHECK-LABEL: @sort_phi_type(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = phi <4 x float> [ <float 1.000000e+01, float 1.000000e+01, float 1.000000e+01, float 1.000000e+01>, [[ENTRY]] ], [ [[TMP9:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = extractelement <4 x float> [[TMP0]], i32 0
; CHECK-NEXT: [[TMP2:%.*]] = insertelement <4 x float> poison, float [[TMP1]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = extractelement <4 x float> [[TMP0]], i32 1
; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x float> [[TMP2]], float [[TMP3]], i32 1
; CHECK-NEXT: [[TMP5:%.*]] = extractelement <4 x float> [[TMP0]], i32 3
; CHECK-NEXT: [[TMP6:%.*]] = insertelement <4 x float> [[TMP4]], float [[TMP5]], i32 2
; CHECK-NEXT: [[TMP7:%.*]] = extractelement <4 x float> [[TMP0]], i32 2
; CHECK-NEXT: [[TMP8:%.*]] = insertelement <4 x float> [[TMP6]], float [[TMP7]], i32 3
; CHECK-NEXT: [[TMP9]] = fmul <4 x float> [[TMP8]], <float 8.000000e+00, float 9.000000e+00, float 1.000000e+02, float 1.110000e+02>
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[INDVARS_IV_NEXT]], 128
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
; CHECK: for.end:
; CHECK-NEXT: [[TMP10:%.*]] = extractelement <4 x float> [[TMP9]], i32 0
; CHECK-NEXT: [[TMP11:%.*]] = extractelement <4 x float> [[TMP9]], i32 1
; CHECK-NEXT: [[ADD29:%.*]] = fadd float [[TMP10]], [[TMP11]]
; CHECK-NEXT: [[TMP12:%.*]] = extractelement <4 x float> [[TMP9]], i32 2
; CHECK-NEXT: [[ADD30:%.*]] = fadd float [[ADD29]], [[TMP12]]
; CHECK-NEXT: [[TMP13:%.*]] = extractelement <4 x float> [[TMP9]], i32 3
; CHECK-NEXT: [[ADD31:%.*]] = fadd float [[ADD30]], [[TMP13]]
; CHECK-NEXT: ret float [[ADD31]]
;
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%Y = phi float [ 1.000000e+01, %entry ], [ %mul10, %for.body ]
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%B = phi float [ 1.000000e+01, %entry ], [ %mul15, %for.body ]
%G = phi float [ 1.000000e+01, %entry ], [ %mul20, %for.body ]
%R = phi float [ 1.000000e+01, %entry ], [ %mul25, %for.body ]
%mul10 = fmul float %Y, 8.000000e+00
%mul15 = fmul float %B, 9.000000e+00
%mul20 = fmul float %R, 10.000000e+01
%mul25 = fmul float %G, 11.100000e+01
%indvars.iv.next = add nsw i64 %indvars.iv, 4
%cmp = icmp slt i64 %indvars.iv.next, 128
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
%add28 = fadd float 1.000000e+01, %mul10
%add29 = fadd float %mul10, %mul15
%add30 = fadd float %add29, %mul20
%add31 = fadd float %add30, %mul25
ret float %add31
}
define void @test(x86_fp80* %i1, x86_fp80* %i2, x86_fp80* %o) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[I1_0:%.*]] = load x86_fp80, x86_fp80* [[I1:%.*]], align 16
; CHECK-NEXT: [[I1_GEP1:%.*]] = getelementptr x86_fp80, x86_fp80* [[I1]], i64 1
; CHECK-NEXT: [[I1_1:%.*]] = load x86_fp80, x86_fp80* [[I1_GEP1]], align 16
; CHECK-NEXT: br i1 undef, label [[THEN:%.*]], label [[END:%.*]]
; CHECK: then:
; CHECK-NEXT: [[I2_GEP0:%.*]] = getelementptr inbounds x86_fp80, x86_fp80* [[I2:%.*]], i64 0
; CHECK-NEXT: [[I2_0:%.*]] = load x86_fp80, x86_fp80* [[I2_GEP0]], align 16
; CHECK-NEXT: [[I2_GEP1:%.*]] = getelementptr inbounds x86_fp80, x86_fp80* [[I2]], i64 1
; CHECK-NEXT: [[I2_1:%.*]] = load x86_fp80, x86_fp80* [[I2_GEP1]], align 16
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[PHI0:%.*]] = phi x86_fp80 [ [[I1_0]], [[ENTRY:%.*]] ], [ [[I2_0]], [[THEN]] ]
; CHECK-NEXT: [[PHI1:%.*]] = phi x86_fp80 [ [[I1_1]], [[ENTRY]] ], [ [[I2_1]], [[THEN]] ]
; CHECK-NEXT: store x86_fp80 [[PHI0]], x86_fp80* [[O:%.*]], align 16
; CHECK-NEXT: [[O_GEP1:%.*]] = getelementptr inbounds x86_fp80, x86_fp80* [[O]], i64 1
; CHECK-NEXT: store x86_fp80 [[PHI1]], x86_fp80* [[O_GEP1]], align 16
; CHECK-NEXT: ret void
;
; Test that we correctly recognize the discontiguous memory in arrays where the
; size is less than the alignment, and through various different GEP formations.
; We disable the vectorization of x86_fp80 for now.
entry:
%i1.0 = load x86_fp80, x86_fp80* %i1, align 16
%i1.gep1 = getelementptr x86_fp80, x86_fp80* %i1, i64 1
%i1.1 = load x86_fp80, x86_fp80* %i1.gep1, align 16
br i1 undef, label %then, label %end
then:
%i2.gep0 = getelementptr inbounds x86_fp80, x86_fp80* %i2, i64 0
%i2.0 = load x86_fp80, x86_fp80* %i2.gep0, align 16
%i2.gep1 = getelementptr inbounds x86_fp80, x86_fp80* %i2, i64 1
%i2.1 = load x86_fp80, x86_fp80* %i2.gep1, align 16
br label %end
end:
%phi0 = phi x86_fp80 [ %i1.0, %entry ], [ %i2.0, %then ]
%phi1 = phi x86_fp80 [ %i1.1, %entry ], [ %i2.1, %then ]
store x86_fp80 %phi0, x86_fp80* %o, align 16
%o.gep1 = getelementptr inbounds x86_fp80, x86_fp80* %o, i64 1
store x86_fp80 %phi1, x86_fp80* %o.gep1, align 16
ret void
}
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