7ee0e0f956
This reverts commit 469702c5d5cc4fa18c3a962afb971950a084f373. https://github.com/llvm/llvm-project/issues/168048
112 lines
4.3 KiB
LLVM
112 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=indvars -S %s -o - | FileCheck %s
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; When bailing out in rewriteLoopExitValues() you would be left with a PHI node
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; that was not deleted, and the IndVar pass would return an incorrect modified
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; status. This was caught by the expensive check introduced in D86589.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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define void @hoge(i64 %x, i64 %idx.start, ptr %ptr) {
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; CHECK-LABEL: @hoge(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N:%.*]] = sdiv exact i64 [[X:%.*]], 40
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; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[IDX_START:%.*]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = sub i64 [[TMP0]], [[N]]
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; CHECK-NEXT: br label [[HEADER:%.*]]
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; CHECK: header:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[LATCH:%.*]] ], [ [[TMP1]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[IDX:%.*]] = phi i64 [ [[IDX_NEXT:%.*]], [[LATCH]] ], [ [[IDX_START]], [[ENTRY]] ]
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; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[N]], [[IDX]]
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; CHECK-NEXT: br i1 [[COND]], label [[END:%.*]], label [[INNER_PREHEADER:%.*]]
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; CHECK: inner.preheader:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], [[INNER]] ], [ 0, [[INNER_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nuw i64 [[I]], 1
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; CHECK-NEXT: store i64 0, ptr [[PTR:%.*]], align 8
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[I_NEXT]], [[INDVARS_IV]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[INNER]], label [[INNER_EXIT:%.*]]
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; CHECK: inner_exit:
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; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[I_NEXT]], [[INNER]] ]
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; CHECK-NEXT: [[INDVAR_USE:%.*]] = add i64 [[INDVAR]], 1
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; CHECK-NEXT: br label [[LATCH]]
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; CHECK: latch:
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; CHECK-NEXT: [[IDX_NEXT]] = add nsw i64 [[IDX]], -1
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], -1
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; CHECK-NEXT: br label [[HEADER]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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entry: ; preds = %entry
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%n = sdiv exact i64 %x, 40
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br label %header
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header: ; preds = %latch, %entry
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%idx = phi i64 [ %idx.next, %latch ], [ %idx.start, %entry ]
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%cond = icmp sgt i64 %n, %idx
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br i1 %cond, label %end, label %inner
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inner: ; preds = %inner, %header
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%i = phi i64 [ %i.next, %inner ], [ 0, %header ]
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%j = phi i64 [ %j.next, %inner ], [ %n, %header ]
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%i.next = add nsw i64 %i, 1
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%j.next = add nsw i64 %j, 1
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store i64 0, ptr %ptr
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%cond1 = icmp slt i64 %j, %idx
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br i1 %cond1, label %inner, label %inner_exit
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inner_exit: ; preds = %inner
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%indvar = phi i64 [ %i.next, %inner ]
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%indvar_use = add i64 %indvar, 1
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br label %latch
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latch: ; preds = %inner_exit
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%idx.next = add nsw i64 %idx, -1
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br label %header
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end: ; preds = %header
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ret void
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}
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declare void @foo()
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define i64 @narow_canonical_iv_wide_multiplied_iv(i32 %x, i64 %y, ptr %0) {
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; CHECK-LABEL: @narow_canonical_iv_wide_multiplied_iv(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SMAX:%.*]] = tail call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 1)
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[SMAX]]
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; CHECK-NEXT: br i1 [[EC]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: [[TMP1:%.*]] = zext nneg i32 [[SMAX]] to i64
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; CHECK-NEXT: [[TMP2:%.*]] = mul i64 [[Y:%.*]], [[TMP1]]
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; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 1
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; CHECK-NEXT: [[TMP6:%.*]] = add nuw nsw i64 [[TMP3]], 1
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; CHECK-NEXT: ret i64 [[TMP6]]
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;
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entry:
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%smax = tail call i32 @llvm.smax.i32(i32 %x, i32 1)
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%mul.y = shl i64 %y, 1
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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%iv.mul = phi i64 [ 1, %entry ], [ %iv.mul.next, %loop ]
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%iv.mul.next = add i64 %iv.mul, %mul.y
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call void @foo()
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%iv.next = add i32 %iv, 1
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%ec = icmp ult i32 %iv.next, %smax
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br i1 %ec, label %loop, label %exit
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exit:
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ret i64 %iv.mul.next
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}
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declare i32 @llvm.smax.i32(i32, i32)
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