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62a274f0e9
This is a functional change for LLE and LDist. The other clients (LV, LVerLICM) already had this explicitly enabled. The temporary boolean parameter to LAA is removed that allowed turning off speculation of symbolic strides. This makes LAA's caching interface LAA::getInfo only take the loop as the parameter. This makes the interface more friendly to the new Pass Manager. The flag -enable-mem-access-versioning is moved from LV to a LAA which now allows turning off speculation globally. llvm-svn: 273064
93 lines
3.9 KiB
LLVM
93 lines
3.9 KiB
LLVM
; RUN: opt -loop-load-elim -S < %s | \
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; RUN: FileCheck %s -check-prefix=ALL -check-prefix=ONE_STRIDE_SPEC \
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; RUN: -check-prefix=TWO_STRIDE_SPEC
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; RUN: opt -loop-load-elim -S -enable-mem-access-versioning=0 < %s | \
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; RUN: FileCheck %s -check-prefix=ALL -check-prefix=NO_ONE_STRIDE_SPEC \
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; RUN: -check-prefix=NO_TWO_STRIDE_SPEC
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; RUN: opt -loop-load-elim -S -loop-load-elimination-scev-check-threshold=1 < %s | \
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; RUN: FileCheck %s -check-prefix=ALL -check-prefix=ONE_STRIDE_SPEC \
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; RUN: -check-prefix=NO_TWO_STRIDE_SPEC
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; Forwarding in the presence of symbolic strides:
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;
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; for (unsigned i = 0; i < 100; i++)
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; A[i + 1] = A[Stride * i] + B[i];
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; ALL-LABEL: @f(
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define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N,
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i64 %stride) {
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; ONE_STRIDE_SPEC: %ident.check = icmp ne i64 %stride, 1
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entry:
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; NO_ONE_STRIDE_SPEC-NOT: %load_initial = load i32, i32* %A
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; ONE_STRIDE_SPEC: %load_initial = load i32, i32* %A
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br label %for.body
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for.body: ; preds = %for.body, %entry
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; NO_ONE_STRIDE_SPEC-NOT: %store_forwarded = phi i32 [ %load_initial, {{.*}} ], [ %add, %for.body ]
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; ONE_STRIDE_SPEC: %store_forwarded = phi i32 [ %load_initial, {{.*}} ], [ %add, %for.body ]
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%mul = mul i64 %indvars.iv, %stride
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %mul
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%load = load i32, i32* %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
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%load_1 = load i32, i32* %arrayidx2, align 4
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; NO_ONE_STRIDE_SPEC-NOT: %add = add i32 %load_1, %store_forwarded
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; ONE_STRIDE_SPEC: %add = add i32 %load_1, %store_forwarded
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%add = add i32 %load_1, %load
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
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store i32 %add, i32* %arrayidx_next, align 4
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%exitcond = icmp eq i64 %indvars.iv.next, %N
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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; With two symbolic strides:
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;
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; for (unsigned i = 0; i < 100; i++)
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; A[Stride2 * (i + 1)] = A[Stride1 * i] + B[i];
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; ALL-LABEL: @two_strides(
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define void @two_strides(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N,
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i64 %stride.1, i64 %stride.2) {
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; TWO_STRIDE_SPEC: %ident.check = icmp ne i64 %stride.2, 1
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; TWO_STRIDE_SPEC: %ident.check1 = icmp ne i64 %stride.1, 1
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; NO_TWO_STRIDE_SPEC-NOT: %ident.check{{.*}} = icmp ne i64 %stride{{.*}}, 1
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entry:
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; NO_TWO_STRIDE_SPEC-NOT: %load_initial = load i32, i32* %A
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; TWO_STRIDE_SPEC: %load_initial = load i32, i32* %A
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br label %for.body
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for.body: ; preds = %for.body, %entry
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; NO_TWO_STRIDE_SPEC-NOT: %store_forwarded = phi i32 [ %load_initial, {{.*}} ], [ %add, %for.body ]
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; TWO_STRIDE_SPEC: %store_forwarded = phi i32 [ %load_initial, {{.*}} ], [ %add, %for.body ]
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%mul = mul i64 %indvars.iv, %stride.1
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %mul
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%load = load i32, i32* %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
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%load_1 = load i32, i32* %arrayidx2, align 4
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; NO_TWO_STRIDE_SPEC-NOT: %add = add i32 %load_1, %store_forwarded
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; TWO_STRIDE_SPEC: %add = add i32 %load_1, %store_forwarded
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%add = add i32 %load_1, %load
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%mul.2 = mul i64 %indvars.iv.next, %stride.2
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%arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %mul.2
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store i32 %add, i32* %arrayidx_next, align 4
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%exitcond = icmp eq i64 %indvars.iv.next, %N
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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