; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes="function(loop(indvars,loop-idiom,loop-deletion),simplifycfg)" -S < %s | FileCheck %s
; Compile command:
; $ clang -m64 -fno-discard-value-names -O0 -S -emit-llvm -Xclang -disable-O0-optnone Code.c
; $ bin/opt -S -passes=mem2reg,loop-simplify,lcssa,loop-rotate \
; -passes=licm,simple-loop-unswitch -enable-nontrivial-unswitch -passes=loop-simplify \
; -passes=loop-deletion,simplifycfg,indvars Code.ll > CodeOpt.ll
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
; void PositiveFor64(int *ar, long long n, long long m)
; {
; long long i;
; for (i=0; i<n; ++i) {
; int *arr = ar + i * m;
; memset(arr, 0, m * sizeof(int));
; }
; }
define dso_local void @PositiveFor64(ptr %ar, i64 %n, i64 %m) {
; CHECK-LABEL: @PositiveFor64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i64 0, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[MUL1:%.*]] = mul i64 [[M:%.*]], 4
; CHECK-NEXT: [[TMP0:%.*]] = mul i64 [[M]], [[N]]
; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP1]], i1 false)
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%cmp1 = icmp slt i64 0, %n
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%mul1 = mul i64 %m, 4
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.02 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%mul = mul nsw i64 %i.02, %m
%add.ptr = getelementptr inbounds i32, ptr %ar, i64 %mul
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr, i8 0, i64 %mul1, i1 false)
%inc = add nsw i64 %i.02, 1
%cmp = icmp slt i64 %inc, %n
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
ret void
}
; void NegativeFor64(int *ar, long long n, long long m)
; {
; long long i;
; for (i=n-1; i>=0; --i) {
; int *arr = ar + i * m;
; memset(arr, 0, m * sizeof(int));
; }
; }
define dso_local void @NegativeFor64(ptr %ar, i64 %n, i64 %m) {
; CHECK-LABEL: @NegativeFor64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i64 [[N:%.*]], 1
; CHECK-NEXT: [[CMP1:%.*]] = icmp sge i64 [[SUB]], 0
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[MUL1:%.*]] = mul i64 [[M:%.*]], 4
; CHECK-NEXT: [[TMP0:%.*]] = mul i64 [[M]], [[N]]
; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP1]], i1 false)
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%sub = sub nsw i64 %n, 1
%cmp1 = icmp sge i64 %sub, 0
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%mul1 = mul i64 %m, 4
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.02 = phi i64 [ %sub, %for.body.lr.ph ], [ %dec, %for.body ]
%mul = mul nsw i64 %i.02, %m
%add.ptr = getelementptr inbounds i32, ptr %ar, i64 %mul
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr, i8 0, i64 %mul1, i1 false)
%dec = add nsw i64 %i.02, -1
%cmp = icmp sge i64 %dec, 0
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
ret void
}
; void NestedFor64(int *ar, long long n, long long m, long long o)
; {
; long long i, j;
; for (i=0; i<n; ++i) {
; for (j=0; j<m; j++) {
; int *arr = ar + i * m * o + j * o;
; memset(arr, 0, o * sizeof(int));
; }
; }
; }
define void @NestedFor64(ptr %ar, i64 %n, i64 %m, i64 %o) {
; CHECK-LABEL: @NestedFor64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i64 0, [[N:%.*]]
; CHECK-NEXT: [[CMP21:%.*]] = icmp slt i64 0, [[M:%.*]]
; CHECK-NEXT: [[MUL7:%.*]] = mul i64 [[O:%.*]], 4
; CHECK-NEXT: [[OR_COND:%.*]] = select i1 [[CMP3]], i1 [[CMP21]], i1 false
; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_BODY_US_PREHEADER:%.*]], label [[FOR_END10:%.*]]
; CHECK: for.body.us.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = mul i64 [[O]], [[M]]
; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; CHECK-NEXT: [[TMP2:%.*]] = mul i64 [[TMP0]], [[N]]
; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP3]], i1 false)
; CHECK-NEXT: br label [[FOR_END10]]
; CHECK: for.end10:
; CHECK-NEXT: ret void
;
entry:
%cmp3 = icmp slt i64 0, %n
br i1 %cmp3, label %for.body.lr.ph, label %for.end10
for.body.lr.ph: ; preds = %entry
%cmp21 = icmp slt i64 0, %m
%mul7 = mul i64 %o, 4
br i1 %cmp21, label %for.body.us.preheader, label %for.end10
for.body.us.preheader: ; preds = %for.body.lr.ph
br label %for.body.us
for.body.us: ; preds = %for.body.us.preheader, %for.cond1.for.end_crit_edge.us
%i.04.us = phi i64 [ %inc9.us, %for.cond1.for.end_crit_edge.us ], [ 0, %for.body.us.preheader ]
%mul.us = mul nsw i64 %i.04.us, %m
%mul4.us = mul nsw i64 %mul.us, %o
%add.ptr.us = getelementptr inbounds i32, ptr %ar, i64 %mul4.us
br label %for.body3.us
for.body3.us: ; preds = %for.body.us, %for.body3.us
%j.02.us = phi i64 [ 0, %for.body.us ], [ %inc.us, %for.body3.us ]
%mul5.us = mul nsw i64 %j.02.us, %o
%add.ptr6.us = getelementptr inbounds i32, ptr %add.ptr.us, i64 %mul5.us
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr6.us, i8 0, i64 %mul7, i1 false)
%inc.us = add nuw nsw i64 %j.02.us, 1
%exitcond = icmp ne i64 %inc.us, %m
br i1 %exitcond, label %for.body3.us, label %for.cond1.for.end_crit_edge.us
for.cond1.for.end_crit_edge.us: ; preds = %for.body3.us
%inc9.us = add nuw nsw i64 %i.04.us, 1
%exitcond5 = icmp ne i64 %inc9.us, %n
br i1 %exitcond5, label %for.body.us, label %for.end10.loopexit
for.end10.loopexit: ; preds = %for.cond1.for.end_crit_edge.us
br label %for.end10
for.end10: ; preds = %for.end10.loopexit, %for.body.lr.ph, %entry
ret void
}
; void PositiveFor32(int *ar, int n, int m)
; {
; int i;
; for (i=0; i<n; ++i) {
; int *arr = ar + i * m;
; memset(arr, 0, m * sizeof(int));
; }
; }
define void @PositiveFor32(ptr %ar, i32 %n, i32 %m) {
; CHECK-LABEL: @PositiveFor32(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i64 0, [[CONV]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CONV1:%.*]] = sext i32 [[M:%.*]] to i64
; CHECK-NEXT: [[CONV2:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[MUL3:%.*]] = mul i64 [[CONV2]], 4
; CHECK-NEXT: [[TMP0:%.*]] = mul i64 [[CONV1]], [[CONV]]
; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP1]], i1 false)
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%conv = sext i32 %n to i64
%cmp1 = icmp slt i64 0, %conv
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%conv1 = sext i32 %m to i64
%conv2 = sext i32 %m to i64
%mul3 = mul i64 %conv2, 4
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.02 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%mul = mul nsw i64 %i.02, %conv1
%add.ptr = getelementptr inbounds i32, ptr %ar, i64 %mul
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr, i8 0, i64 %mul3, i1 false)
%inc = add nsw i64 %i.02, 1
%cmp = icmp slt i64 %inc, %conv
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
ret void
}
; void Negative32(int *ar, int n, int m)
; {
; long long i;
; for (i=n-1; i>=0; i--) {
; int *arr = ar + i * m;
; memset(arr, 0, m * sizeof(int));
; }
; }
define void @Negative32(ptr %ar, i32 %n, i32 %m) {
; CHECK-LABEL: @Negative32(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[N:%.*]], 1
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[SUB]] to i64
; CHECK-NEXT: [[CMP1:%.*]] = icmp sge i64 [[CONV]], 0
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CONV1:%.*]] = sext i32 [[M:%.*]] to i64
; CHECK-NEXT: [[CONV2:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[MUL3:%.*]] = mul i64 [[CONV2]], 4
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = mul i64 [[CONV1]], [[TMP0]]
; CHECK-NEXT: [[TMP2:%.*]] = shl i64 [[TMP1]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP2]], i1 false)
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%sub = sub nsw i32 %n, 1
%conv = sext i32 %sub to i64
%cmp1 = icmp sge i64 %conv, 0
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%conv1 = sext i32 %m to i64
%conv2 = sext i32 %m to i64
%mul3 = mul i64 %conv2, 4
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.02 = phi i64 [ %conv, %for.body.lr.ph ], [ %dec, %for.body ]
%mul = mul nsw i64 %i.02, %conv1
%add.ptr = getelementptr inbounds i32, ptr %ar, i64 %mul
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr, i8 0, i64 %mul3, i1 false)
%dec = add nsw i64 %i.02, -1
%cmp = icmp sge i64 %dec, 0
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
ret void
}
; This case requires SCEVFolder in LoopIdiomRecognize.cpp to fold SCEV prior to comparison.
; For the inner-loop, SCEVFolder is not needed, however the promoted memset size would be based
; on the trip count of inner-loop (which is an unsigned integer).
; Then in the outer loop, the pointer stride SCEV for memset needs to be converted based on the
; loop guard for it to equal to the memset size SCEV. The loop guard guaranteeds that m >= 0
; inside the loop, so m can be converted from sext to zext, making the two SCEV-s equal.
; void NestedFor32(int *ar, int n, int m, int o)
; {
; int i, j;
; for (i=0; i<n; ++i) {
; for (j=0; j<m; j++) {
; int *arr = ar + i * m * o + j * o;
; memset(arr, 0, o * sizeof(int));
; }
; }
; }
define void @NestedFor32(ptr %ar, i32 %n, i32 %m, i32 %o) {
; CHECK-LABEL: @NestedFor32(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i32 0, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END11:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CMP21:%.*]] = icmp slt i32 0, [[M:%.*]]
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[O:%.*]] to i64
; CHECK-NEXT: [[MUL8:%.*]] = mul i64 [[CONV]], 4
; CHECK-NEXT: br i1 [[CMP21]], label [[FOR_BODY_US_PREHEADER:%.*]], label [[FOR_END11]]
; CHECK: for.body.us.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[O]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT10:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT: [[TMP2:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 2
; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[M]] to i64
; CHECK-NEXT: [[TMP5:%.*]] = mul i64 [[TMP0]], [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = shl i64 [[TMP5]], 2
; CHECK-NEXT: [[TMP7:%.*]] = mul i64 [[TMP5]], [[WIDE_TRIP_COUNT10]]
; CHECK-NEXT: [[TMP8:%.*]] = shl i64 [[TMP7]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP8]], i1 false)
; CHECK-NEXT: br label [[FOR_END11]]
; CHECK: for.end11:
; CHECK-NEXT: ret void
;
entry:
%cmp3 = icmp slt i32 0, %n
br i1 %cmp3, label %for.body.lr.ph, label %for.end11
for.body.lr.ph: ; preds = %entry
%cmp21 = icmp slt i32 0, %m
%conv = sext i32 %o to i64
%mul8 = mul i64 %conv, 4
br i1 %cmp21, label %for.body.us.preheader, label %for.end11
for.body.us.preheader: ; preds = %for.body.lr.ph
%0 = sext i32 %o to i64
%1 = sext i32 %m to i64
%2 = sext i32 %o to i64
%wide.trip.count10 = zext i32 %n to i64
br label %for.body.us
for.body.us: ; preds = %for.body.us.preheader, %for.cond1.for.end_crit_edge.us
%indvars.iv6 = phi i64 [ 0, %for.body.us.preheader ], [ %indvars.iv.next7, %for.cond1.for.end_crit_edge.us ]
%3 = mul nsw i64 %indvars.iv6, %1
%4 = mul nsw i64 %3, %2
%add.ptr.us = getelementptr inbounds i32, ptr %ar, i64 %4
%wide.trip.count = zext i32 %m to i64
br label %for.body3.us
for.body3.us: ; preds = %for.body.us, %for.body3.us
%indvars.iv = phi i64 [ 0, %for.body.us ], [ %indvars.iv.next, %for.body3.us ]
%5 = mul nsw i64 %indvars.iv, %0
%add.ptr7.us = getelementptr inbounds i32, ptr %add.ptr.us, i64 %5
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr7.us, i8 0, i64 %mul8, i1 false)
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body3.us, label %for.cond1.for.end_crit_edge.us
for.cond1.for.end_crit_edge.us: ; preds = %for.body3.us
%indvars.iv.next7 = add nuw nsw i64 %indvars.iv6, 1
%exitcond11 = icmp ne i64 %indvars.iv.next7, %wide.trip.count10
br i1 %exitcond11, label %for.body.us, label %for.end11.loopexit
for.end11.loopexit: ; preds = %for.cond1.for.end_crit_edge.us
br label %for.end11
for.end11: ; preds = %for.end11.loopexit, %for.body.lr.ph, %entry
ret void
}
; void NegStart(int n, int m, int *ar) {
; for (int i = -100; i < n; i++) {
; int *arr = ar + (i + 100) * m;
; memset(arr, 0, m * sizeof(int));
; }
; }
define void @NegStart(i32 %n, i32 %m, ptr %ar) {
; CHECK-LABEL: @NegStart(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 -100, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[CONV:%.*]] = sext i32 [[M:%.*]] to i64
; CHECK-NEXT: [[MUL1:%.*]] = mul i64 [[CONV]], 4
; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = add nsw i64 [[WIDE_TRIP_COUNT]], 100
; CHECK-NEXT: [[TMP2:%.*]] = mul i64 [[TMP1]], [[TMP0]]
; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 2
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[AR:%.*]], i8 0, i64 [[TMP3]], i1 false)
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%cmp1 = icmp slt i32 -100, %n
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%conv = sext i32 %m to i64
%mul1 = mul i64 %conv, 4
%0 = sext i32 %m to i64
%wide.trip.count = sext i32 %n to i64
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%indvars.iv = phi i64 [ -100, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
%1 = add nsw i64 %indvars.iv, 100
%2 = mul nsw i64 %1, %0
%add.ptr = getelementptr inbounds i32, ptr %ar, i64 %2
call void @llvm.memset.p0.i64(ptr align 4 %add.ptr, i8 0, i64 %mul1, i1 false)
%indvars.iv.next = add nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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