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clang-p2996/llvm/test/Transforms/SLPVectorizer/X86/cse.ll
Philip Reames 7d6e8f2a96 [slp] Delete dead scalar instructions feeding vectorized instructions 
If we vectorize a e.g. store, we leave around a bunch of getelementptrs for the individual scalar stores which we removed. We can go ahead and delete them as well.

This is purely for test output quality and readability. It should have no effect in any sane pipeline.

Differential Revision: https://reviews.llvm.org/D122493
2022-03-28 20:10:13 -07:00

350 lines
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LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basic-aa -slp-vectorizer -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-macosx10.8.0"
;int test(double *G) {
; G[0] = 1+G[5]*4;
; G[1] = 6+G[6]*3;
; G[2] = 7+G[5]*4;
; G[3] = 8+G[6]*4;
;}
define i32 @test(double* nocapture %G) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds double, double* [[G:%.*]], i64 5
; 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: [[TMP2:%.*]] = fmul <2 x double> [[TMP1]], <double 4.000000e+00, double 3.000000e+00>
; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], <double 1.000000e+00, double 6.000000e+00>
; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[G]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x double> [[TMP2]], i32 0
; CHECK-NEXT: [[ARRAYIDX9:%.*]] = getelementptr inbounds double, double* [[G]], i64 2
; CHECK-NEXT: [[TMP6:%.*]] = extractelement <2 x double> [[TMP1]], i32 1
; CHECK-NEXT: [[MUL11:%.*]] = fmul double [[TMP6]], 4.000000e+00
; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> poison, double [[TMP5]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[MUL11]], i32 1
; CHECK-NEXT: [[TMP9:%.*]] = fadd <2 x double> [[TMP8]], <double 7.000000e+00, double 8.000000e+00>
; CHECK-NEXT: [[TMP10:%.*]] = bitcast double* [[ARRAYIDX9]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP9]], <2 x double>* [[TMP10]], align 8
; CHECK-NEXT: ret i32 undef
;
entry:
%arrayidx = getelementptr inbounds double, double* %G, i64 5
%0 = load double, double* %arrayidx, align 8
%mul = fmul double %0, 4.000000e+00
%add = fadd double %mul, 1.000000e+00
store double %add, double* %G, align 8
%arrayidx2 = getelementptr inbounds double, double* %G, i64 6
%1 = load double, double* %arrayidx2, align 8
%mul3 = fmul double %1, 3.000000e+00
%add4 = fadd double %mul3, 6.000000e+00
%arrayidx5 = getelementptr inbounds double, double* %G, i64 1
store double %add4, double* %arrayidx5, align 8
%add8 = fadd double %mul, 7.000000e+00
%arrayidx9 = getelementptr inbounds double, double* %G, i64 2
store double %add8, double* %arrayidx9, align 8
%mul11 = fmul double %1, 4.000000e+00
%add12 = fadd double %mul11, 8.000000e+00
%arrayidx13 = getelementptr inbounds double, double* %G, i64 3
store double %add12, double* %arrayidx13, align 8
ret i32 undef
}
;int foo(double *A, int n) {
; A[0] = A[0] * 7.9 * n + 6.0;
; A[1] = A[1] * 7.7 * n + 2.0;
; A[2] = A[2] * 7.6 * n + 3.0;
; A[3] = A[3] * 7.4 * n + 4.0;
;}
define i32 @foo(double* nocapture %A, i32 %n) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[N:%.*]] to double
; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[A:%.*]] to <4 x double>*
; CHECK-NEXT: [[TMP1:%.*]] = load <4 x double>, <4 x double>* [[TMP0]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = fmul <4 x double> [[TMP1]], <double 7.900000e+00, double 7.700000e+00, double 7.600000e+00, double 7.400000e+00>
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x double> poison, double [[CONV]], i32 0
; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x double> [[TMP3]], <4 x double> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[TMP4:%.*]] = fmul <4 x double> [[SHUFFLE]], [[TMP2]]
; CHECK-NEXT: [[TMP5:%.*]] = fadd <4 x double> [[TMP4]], <double 6.000000e+00, double 2.000000e+00, double 3.000000e+00, double 4.000000e+00>
; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[A]] to <4 x double>*
; CHECK-NEXT: store <4 x double> [[TMP5]], <4 x double>* [[TMP6]], align 8
; CHECK-NEXT: ret i32 undef
;
entry:
%0 = load double, double* %A, align 8
%mul = fmul double %0, 7.900000e+00
%conv = sitofp i32 %n to double
%mul1 = fmul double %conv, %mul
%add = fadd double %mul1, 6.000000e+00
store double %add, double* %A, align 8
%arrayidx3 = getelementptr inbounds double, double* %A, i64 1
%1 = load double, double* %arrayidx3, align 8
%mul4 = fmul double %1, 7.700000e+00
%mul6 = fmul double %conv, %mul4
%add7 = fadd double %mul6, 2.000000e+00
store double %add7, double* %arrayidx3, align 8
%arrayidx9 = getelementptr inbounds double, double* %A, i64 2
%2 = load double, double* %arrayidx9, align 8
%mul10 = fmul double %2, 7.600000e+00
%mul12 = fmul double %conv, %mul10
%add13 = fadd double %mul12, 3.000000e+00
store double %add13, double* %arrayidx9, align 8
%arrayidx15 = getelementptr inbounds double, double* %A, i64 3
%3 = load double, double* %arrayidx15, align 8
%mul16 = fmul double %3, 7.400000e+00
%mul18 = fmul double %conv, %mul16
%add19 = fadd double %mul18, 4.000000e+00
store double %add19, double* %arrayidx15, align 8
ret i32 undef
}
; int test2(double *G, int k) {
; if (k) {
; G[0] = 1+G[5]*4;
; G[1] = 6+G[6]*3;
; } else {
; G[2] = 7+G[5]*4;
; G[3] = 8+G[6]*3;
; }
; }
; We can't merge the gather sequences because one does not dominate the other.
define i32 @test2(double* nocapture %G, i32 %k) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[K:%.*]], 0
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds double, double* [[G:%.*]], i64 5
; CHECK-NEXT: [[TMP3:%.*]] = load double, double* [[TMP2]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = fmul double [[TMP3]], 4.000000e+00
; CHECK-NEXT: br i1 [[TMP1]], label [[TMP13:%.*]], label [[TMP5:%.*]]
; CHECK: 5:
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds double, double* [[G]], i64 6
; CHECK-NEXT: [[TMP7:%.*]] = load double, double* [[TMP6]], align 8
; CHECK-NEXT: [[TMP8:%.*]] = fmul double [[TMP7]], 3.000000e+00
; CHECK-NEXT: [[TMP9:%.*]] = insertelement <2 x double> poison, double [[TMP4]], i32 0
; CHECK-NEXT: [[TMP10:%.*]] = insertelement <2 x double> [[TMP9]], double [[TMP8]], i32 1
; CHECK-NEXT: [[TMP11:%.*]] = fadd <2 x double> [[TMP10]], <double 1.000000e+00, double 6.000000e+00>
; CHECK-NEXT: [[TMP12:%.*]] = bitcast double* [[G]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP11]], <2 x double>* [[TMP12]], align 8
; CHECK-NEXT: br label [[TMP22:%.*]]
; CHECK: 13:
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds double, double* [[G]], i64 2
; CHECK-NEXT: [[TMP15:%.*]] = getelementptr inbounds double, double* [[G]], i64 6
; CHECK-NEXT: [[TMP16:%.*]] = load double, double* [[TMP15]], align 8
; CHECK-NEXT: [[TMP17:%.*]] = fmul double [[TMP16]], 3.000000e+00
; CHECK-NEXT: [[TMP18:%.*]] = insertelement <2 x double> poison, double [[TMP4]], i32 0
; CHECK-NEXT: [[TMP19:%.*]] = insertelement <2 x double> [[TMP18]], double [[TMP17]], i32 1
; CHECK-NEXT: [[TMP20:%.*]] = fadd <2 x double> [[TMP19]], <double 7.000000e+00, double 8.000000e+00>
; CHECK-NEXT: [[TMP21:%.*]] = bitcast double* [[TMP14]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP20]], <2 x double>* [[TMP21]], align 8
; CHECK-NEXT: br label [[TMP22]]
; CHECK: 22:
; CHECK-NEXT: ret i32 undef
;
%1 = icmp eq i32 %k, 0
%2 = getelementptr inbounds double, double* %G, i64 5
%3 = load double, double* %2, align 8
%4 = fmul double %3, 4.000000e+00
br i1 %1, label %12, label %5
; <label>:5 ; preds = %0
%6 = fadd double %4, 1.000000e+00
store double %6, double* %G, align 8
%7 = getelementptr inbounds double, double* %G, i64 6
%8 = load double, double* %7, align 8
%9 = fmul double %8, 3.000000e+00
%10 = fadd double %9, 6.000000e+00
%11 = getelementptr inbounds double, double* %G, i64 1
store double %10, double* %11, align 8
br label %20
; <label>:12 ; preds = %0
%13 = fadd double %4, 7.000000e+00
%14 = getelementptr inbounds double, double* %G, i64 2
store double %13, double* %14, align 8
%15 = getelementptr inbounds double, double* %G, i64 6
%16 = load double, double* %15, align 8
%17 = fmul double %16, 3.000000e+00
%18 = fadd double %17, 8.000000e+00
%19 = getelementptr inbounds double, double* %G, i64 3
store double %18, double* %19, align 8
br label %20
; <label>:20 ; preds = %12, %5
ret i32 undef
}
;int foo(double *A, int n) {
; A[0] = A[0] * 7.9 * n + 6.0;
; A[1] = A[1] * 7.9 * n + 6.0;
; A[2] = A[2] * 7.9 * n + 6.0;
; A[3] = A[3] * 7.9 * n + 6.0;
;}
define i32 @foo4(double* nocapture %A, i32 %n) {
; CHECK-LABEL: @foo4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[N:%.*]] to double
; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[A:%.*]] to <4 x double>*
; CHECK-NEXT: [[TMP1:%.*]] = load <4 x double>, <4 x double>* [[TMP0]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = fmul <4 x double> [[TMP1]], <double 7.900000e+00, double 7.900000e+00, double 7.900000e+00, double 7.900000e+00>
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x double> poison, double [[CONV]], i32 0
; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x double> [[TMP3]], <4 x double> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[TMP4:%.*]] = fmul <4 x double> [[SHUFFLE]], [[TMP2]]
; CHECK-NEXT: [[TMP5:%.*]] = fadd <4 x double> [[TMP4]], <double 6.000000e+00, double 6.000000e+00, double 6.000000e+00, double 6.000000e+00>
; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[A]] to <4 x double>*
; CHECK-NEXT: store <4 x double> [[TMP5]], <4 x double>* [[TMP6]], align 8
; CHECK-NEXT: ret i32 undef
;
entry:
%0 = load double, double* %A, align 8
%mul = fmul double %0, 7.900000e+00
%conv = sitofp i32 %n to double
%mul1 = fmul double %conv, %mul
%add = fadd double %mul1, 6.000000e+00
store double %add, double* %A, align 8
%arrayidx3 = getelementptr inbounds double, double* %A, i64 1
%1 = load double, double* %arrayidx3, align 8
%mul4 = fmul double %1, 7.900000e+00
%mul6 = fmul double %conv, %mul4
%add7 = fadd double %mul6, 6.000000e+00
store double %add7, double* %arrayidx3, align 8
%arrayidx9 = getelementptr inbounds double, double* %A, i64 2
%2 = load double, double* %arrayidx9, align 8
%mul10 = fmul double %2, 7.900000e+00
%mul12 = fmul double %conv, %mul10
%add13 = fadd double %mul12, 6.000000e+00
store double %add13, double* %arrayidx9, align 8
%arrayidx15 = getelementptr inbounds double, double* %A, i64 3
%3 = load double, double* %arrayidx15, align 8
%mul16 = fmul double %3, 7.900000e+00
%mul18 = fmul double %conv, %mul16
%add19 = fadd double %mul18, 6.000000e+00
store double %add19, double* %arrayidx15, align 8
ret i32 undef
}
;int partial_mrg(double *A, int n) {
; A[0] = A[0] * n;
; A[1] = A[1] * n;
; if (n < 4) return 0;
; A[2] = A[2] * n;
; A[3] = A[3] * (n+4);
;}
define i32 @partial_mrg(double* nocapture %A, i32 %n) {
; CHECK-LABEL: @partial_mrg(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[N:%.*]] to double
; 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: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[CONV]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[CONV]], i32 1
; CHECK-NEXT: [[TMP4:%.*]] = fmul <2 x double> [[TMP3]], [[TMP1]]
; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[A]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 8
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[N]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX7:%.*]] = getelementptr inbounds double, double* [[A]], i64 2
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[N]], 4
; CHECK-NEXT: [[CONV12:%.*]] = sitofp i32 [[ADD]] to double
; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[ARRAYIDX7]] to <2 x double>*
; CHECK-NEXT: [[TMP7:%.*]] = load <2 x double>, <2 x double>* [[TMP6]], align 8
; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> [[TMP2]], double [[CONV12]], i32 1
; CHECK-NEXT: [[TMP9:%.*]] = fmul <2 x double> [[TMP8]], [[TMP7]]
; CHECK-NEXT: [[TMP10:%.*]] = bitcast double* [[ARRAYIDX7]] to <2 x double>*
; CHECK-NEXT: store <2 x double> [[TMP9]], <2 x double>* [[TMP10]], align 8
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret i32 0
;
entry:
%0 = load double, double* %A, align 8
%conv = sitofp i32 %n to double
%mul = fmul double %conv, %0
store double %mul, double* %A, align 8
%arrayidx2 = getelementptr inbounds double, double* %A, i64 1
%1 = load double, double* %arrayidx2, align 8
%mul4 = fmul double %conv, %1
store double %mul4, double* %arrayidx2, align 8
%cmp = icmp slt i32 %n, 4
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%arrayidx7 = getelementptr inbounds double, double* %A, i64 2
%2 = load double, double* %arrayidx7, align 8
%mul9 = fmul double %conv, %2
store double %mul9, double* %arrayidx7, align 8
%arrayidx11 = getelementptr inbounds double, double* %A, i64 3
%3 = load double, double* %arrayidx11, align 8
%add = add nsw i32 %n, 4
%conv12 = sitofp i32 %add to double
%mul13 = fmul double %conv12, %3
store double %mul13, double* %arrayidx11, align 8
br label %return
return: ; preds = %entry, %if.end
ret i32 0
}
%class.B.53.55 = type { %class.A.52.54, double }
%class.A.52.54 = type { double, double, double }
@a = external global double, align 8
define void @PR19646(%class.B.53.55* %this) {
; CHECK-LABEL: @PR19646(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 undef, label [[IF_END13:%.*]], label [[IF_END13]]
; CHECK: sw.epilog7:
; CHECK-NEXT: [[DOTIN:%.*]] = getelementptr inbounds [[CLASS_B_53_55:%.*]], %class.B.53.55* [[THIS:%.*]], i64 0, i32 0, i32 1
; CHECK-NEXT: [[TMP0:%.*]] = load double, double* [[DOTIN]], align 8
; CHECK-NEXT: [[ADD:%.*]] = fadd double undef, 0.000000e+00
; CHECK-NEXT: [[ADD6:%.*]] = fadd double [[ADD]], [[TMP0]]
; CHECK-NEXT: [[TMP1:%.*]] = load double, double* @a, align 8
; CHECK-NEXT: [[ADD8:%.*]] = fadd double [[TMP1]], 0.000000e+00
; CHECK-NEXT: [[_DY:%.*]] = getelementptr inbounds [[CLASS_B_53_55]], %class.B.53.55* [[THIS]], i64 0, i32 0, i32 2
; CHECK-NEXT: [[TMP2:%.*]] = load double, double* [[_DY]], align 8
; CHECK-NEXT: [[ADD10:%.*]] = fadd double [[ADD8]], [[TMP2]]
; CHECK-NEXT: br i1 undef, label [[IF_THEN12:%.*]], label [[IF_END13]]
; CHECK: if.then12:
; CHECK-NEXT: [[TMP3:%.*]] = load double, double* undef, align 8
; CHECK-NEXT: br label [[IF_END13]]
; CHECK: if.end13:
; CHECK-NEXT: [[X_1:%.*]] = phi double [ 0.000000e+00, [[IF_THEN12]] ], [ [[ADD6]], [[SW_EPILOG7:%.*]] ], [ undef, [[ENTRY:%.*]] ], [ undef, [[ENTRY]] ]
; CHECK-NEXT: [[B_0:%.*]] = phi double [ [[TMP3]], [[IF_THEN12]] ], [ [[ADD10]], [[SW_EPILOG7]] ], [ undef, [[ENTRY]] ], [ undef, [[ENTRY]] ]
; CHECK-NEXT: unreachable
;
entry:
br i1 undef, label %if.end13, label %if.end13
sw.epilog7: ; No predecessors!
%.in = getelementptr inbounds %class.B.53.55, %class.B.53.55* %this, i64 0, i32 0, i32 1
%0 = load double, double* %.in, align 8
%add = fadd double undef, 0.000000e+00
%add6 = fadd double %add, %0
%1 = load double, double* @a, align 8
%add8 = fadd double %1, 0.000000e+00
%_dy = getelementptr inbounds %class.B.53.55, %class.B.53.55* %this, i64 0, i32 0, i32 2
%2 = load double, double* %_dy, align 8
%add10 = fadd double %add8, %2
br i1 undef, label %if.then12, label %if.end13
if.then12: ; preds = %sw.epilog7
%3 = load double, double* undef, align 8
br label %if.end13
if.end13: ; preds = %if.then12, %sw.epilog7, %entry
%x.1 = phi double [ 0.000000e+00, %if.then12 ], [ %add6, %sw.epilog7 ], [ undef, %entry ], [ undef, %entry ]
%b.0 = phi double [ %3, %if.then12 ], [ %add10, %sw.epilog7 ], [ undef, %entry], [ undef, %entry ]
unreachable
}
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