diff options
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize/skip-iterations.ll')
-rw-r--r-- | llvm/test/Transforms/LoopVectorize/skip-iterations.ll | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/skip-iterations.ll b/llvm/test/Transforms/LoopVectorize/skip-iterations.ll deleted file mode 100644 index 27007aa713b..00000000000 --- a/llvm/test/Transforms/LoopVectorize/skip-iterations.ll +++ /dev/null @@ -1,181 +0,0 @@ -; RUN: opt < %s -loop-vectorize -force-vector-width=4 -dce -instcombine -S | FileCheck %s - -target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" - -; tests skipping iterations within a VF through break/continue/gotos. - -; The main difficulty in vectorizing these loops in test1,test2 and test3 is -; safely speculating that the widened load of A[i] should not fault if the -; scalarized loop does not fault. For example, the -; original load in the scalar loop may not fault, but the last iteration of the -; vectorized load can fault (if it crosses a page boudary for example). -; This last vector iteration is where *one* of the -; scalar iterations lead to the early exit. - -; int test(int *A, int Length) { -; for (int i = 0; i < Length; i++) { -; if (A[i] > 10.0) goto end; -; A[i] = 0; -; } -; end: -; return 0; -; } -; CHECK-LABEL: test1( -; CHECK-NOT: <4 x i32> -define i32 @test1(i32* nocapture %A, i32 %Length) { -entry: - %cmp8 = icmp sgt i32 %Length, 0 - br i1 %cmp8, label %for.body.preheader, label %end - -for.body.preheader: ; preds = %entry - br label %for.body - -for.body: ; preds = %for.body.preheader, %if.else - %indvars.iv = phi i64 [ %indvars.iv.next, %if.else ], [ 0, %for.body.preheader ] - %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv - %0 = load i32, i32* %arrayidx, align 4, !tbaa !15 - %cmp1 = icmp sgt i32 %0, 10 - br i1 %cmp1, label %end.loopexit, label %if.else - -if.else: ; preds = %for.body - store i32 0, i32* %arrayidx, align 4, !tbaa !15 - %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 - %1 = trunc i64 %indvars.iv.next to i32 - %cmp = icmp slt i32 %1, %Length - br i1 %cmp, label %for.body, label %end.loopexit - -end.loopexit: ; preds = %if.else, %for.body - br label %end - -end: ; preds = %end.loopexit, %entry - ret i32 0 -} - -; We don't use anything from within the loop at the early exit path -; so we do not need to know which iteration caused the early exit path. -; bool test2(int *A, int Length, int K) { -; for (int i = 0; i < Length; i++) { -; if (A[i] == K) return true; -; } -; return false; -; } -; TODO: Today we do not vectorize this, but we could teach the vectorizer, once -; the hard part of proving/speculating A[i:VF - 1] loads does not fault is handled by the -; compiler/hardware. - -; CHECK-LABEL: test2( -; CHECK-NOT: <4 x i32> -define i32 @test2(i32* nocapture %A, i32 %Length, i32 %K) { -entry: - %cmp8 = icmp sgt i32 %Length, 0 - br i1 %cmp8, label %for.body.preheader, label %end - -for.body.preheader: ; preds = %entry - br label %for.body - -for.body: ; preds = %for.body.preheader, %if.else - %indvars.iv = phi i64 [ %indvars.iv.next, %if.else ], [ 0, %for.body.preheader ] - %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv - %ld = load i32, i32* %arrayidx, align 4 - %cmp1 = icmp eq i32 %ld, %K - br i1 %cmp1, label %end.loopexit, label %if.else - -if.else: ; preds = %for.body - %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 - %trunc = trunc i64 %indvars.iv.next to i32 - %cmp = icmp slt i32 %trunc, %Length - br i1 %cmp, label %for.body, label %end.loopexit - -end.loopexit: ; preds = %if.else, %for.body - %result.lcssa = phi i32 [ 1, %for.body ], [ 0, %if.else ] - br label %end - -end: ; preds = %end.loopexit, %entry - %result = phi i32 [ %result.lcssa, %end.loopexit ], [ 0, %entry ] - ret i32 %result -} - -; We use the IV in the early exit -; so we need to know which iteration caused the early exit path. -; int test3(int *A, int Length, int K) { -; for (int i = 0; i < Length; i++) { -; if (A[i] == K) return i; -; } -; return -1; -; } -; TODO: Today we do not vectorize this, but we could teach the vectorizer (once -; we handle the speculation safety of the widened load). -; CHECK-LABEL: test3( -; CHECK-NOT: <4 x i32> -define i32 @test3(i32* nocapture %A, i32 %Length, i32 %K) { -entry: - %cmp8 = icmp sgt i32 %Length, 0 - br i1 %cmp8, label %for.body.preheader, label %end - -for.body.preheader: ; preds = %entry - br label %for.body - -for.body: ; preds = %for.body.preheader, %if.else - %indvars.iv = phi i64 [ %indvars.iv.next, %if.else ], [ 0, %for.body.preheader ] - %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv - %ld = load i32, i32* %arrayidx, align 4 - %cmp1 = icmp eq i32 %ld, %K - br i1 %cmp1, label %end.loopexit, label %if.else - -if.else: ; preds = %for.body - %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 - %trunc = trunc i64 %indvars.iv.next to i32 - %cmp = icmp slt i32 %trunc, %Length - br i1 %cmp, label %for.body, label %end.loopexit - -end.loopexit: ; preds = %if.else, %for.body - %result.lcssa = phi i64 [ %indvars.iv, %for.body ], [ -1, %if.else ] - %res.trunc = trunc i64 %result.lcssa to i32 - br label %end - -end: ; preds = %end.loopexit, %entry - %result = phi i32 [ %res.trunc, %end.loopexit ], [ -1, %entry ] - ret i32 %result -} - -; bool test4(int *A, int Length, int K, int J) { -; for (int i = 0; i < Length; i++) { -; if (A[i] == K) continue; -; A[i] = J; -; } -; } -; For this test, we vectorize and generate predicated stores to A[i]. -; CHECK-LABEL: test4( -; CHECK: <4 x i32> -define void @test4(i32* nocapture %A, i32 %Length, i32 %K, i32 %J) { -entry: - %cmp8 = icmp sgt i32 %Length, 0 - br i1 %cmp8, label %for.body.preheader, label %end.loopexit - -for.body.preheader: ; preds = %entry - br label %for.body - -for.body: ; preds = %for.body.preheader, %if.else - %indvars.iv = phi i64 [ %indvars.iv.next, %latch ], [ 0, %for.body.preheader ] - %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv - %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 - %trunc = trunc i64 %indvars.iv.next to i32 - %ld = load i32, i32* %arrayidx, align 4 - %cmp1 = icmp eq i32 %ld, %K - br i1 %cmp1, label %latch, label %if.else - -if.else: - store i32 %J, i32* %arrayidx, align 4 - br label %latch - -latch: ; preds = %for.body - %cmp = icmp slt i32 %trunc, %Length - br i1 %cmp, label %for.body, label %end.loopexit - -end.loopexit: ; preds = %if.else, %for.body - ret void -} -!15 = !{!16, !16, i64 0} -!16 = !{!"int", !17, i64 0} -!17 = !{!"omnipotent char", !18, i64 0} -!18 = !{!"Simple C/C++ TBAA"} |