241 lines
8.9 KiB
LLVM
241 lines
8.9 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -indvars -S | FileCheck %s
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; This tests that the IV is recomputed outside of the loop even when it is known
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; to be computed by the loop and used in the loop any way, if it is cheap to do
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; so. In the example below the value can be computed outside of the loop,
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; and we should do so because after that IV is no longer used outside of
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; the loop, which is likely beneficial for vectorization.
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;
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; extern void func(unsigned val);
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;
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; void test(unsigned m)
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; {
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; unsigned a = 0;
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;
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; for (int i=0; i<186; i++) {
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; a += m;
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; func(a);
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; }
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;
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; func(a);
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; }
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declare void @func(i32)
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define void @test(i32 %m) nounwind uwtable {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: tail call void @func(i32 [[ADD]])
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: tail call void @func(i32 [[ADD_LCSSA]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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tail call void @func(i32 %add)
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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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tail call void @func(i32 %add)
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ret void
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}
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define i32 @test2(i32 %m) nounwind uwtable {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: tail call void @func(i32 [[ADD]])
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: ret i32 [[ADD_LCSSA]]
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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tail call void @func(i32 %add)
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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 i32 %add
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}
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define void @test3(i32 %m) nounwind uwtable {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: tail call void @func(i32 [[ADD]])
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: tail call void @func(i32 [[ADD_LCSSA]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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mul i32 %add, 1
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mul i32 %add, 1
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mul i32 %add, 1
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mul i32 %add, 1
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mul i32 %add, 1
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mul i32 %add, 1
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tail call void @func(i32 %add)
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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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tail call void @func(i32 %add)
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ret void
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}
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define void @test4(i32 %m) nounwind uwtable {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: tail call void @func(i32 [[ADD]])
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[SOFT_USE:%.*]] = add i32 [[ADD_LCSSA]], 123
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; CHECK-NEXT: tail call void @func(i32 [[SOFT_USE]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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tail call void @func(i32 %add)
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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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%soft_use = add i32 %add, 123
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tail call void @func(i32 %soft_use)
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ret void
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}
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define void @test5(i32 %m) nounwind uwtable {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: [[SOFT_USE:%.*]] = add i32 [[ADD]], 123
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; CHECK-NEXT: tail call void @func(i32 [[SOFT_USE]])
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: tail call void @func(i32 [[ADD_LCSSA]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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%soft_use = add i32 %add, 123
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tail call void @func(i32 %soft_use)
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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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tail call void @func(i32 %add)
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ret void
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}
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define void @test6(i32 %m, i32* %p) nounwind uwtable {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_06:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[A_05:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ADD]] = add i32 [[A_05]], [[M:%.*]]
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; CHECK-NEXT: [[SOFT_USE:%.*]] = add i32 [[ADD]], 123
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; CHECK-NEXT: [[PIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[ADD]]
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; CHECK-NEXT: store i32 [[SOFT_USE]], i32* [[PIDX]]
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_06]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 186
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ]
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; CHECK-NEXT: tail call void @func(i32 [[ADD_LCSSA]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%a.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%add = add i32 %a.05, %m
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%soft_use = add i32 %add, 123
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%pidx = getelementptr i32, i32* %p, i32 %add
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store i32 %soft_use, i32* %pidx
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%inc = add nsw i32 %i.06, 1
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%exitcond = icmp eq i32 %inc, 186
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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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tail call void @func(i32 %add)
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ret void
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}
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