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|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=indvars -replexitval=always -S | FileCheck %s
; Make sure IndVars preserves LCSSA form, especially across loop nests.
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"
define void @PR18642(i32 %x) {
; CHECK-LABEL: @PR18642(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
; CHECK: outer.header:
; CHECK-NEXT: br label [[INNER_HEADER:%.*]]
; CHECK: inner.header:
; CHECK-NEXT: br i1 false, label [[INNER_LATCH:%.*]], label [[OUTER_LATCH:%.*]]
; CHECK: inner.latch:
; CHECK-NEXT: br i1 true, label [[INNER_HEADER]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: outer.latch:
; CHECK-NEXT: br i1 false, label [[OUTER_HEADER]], label [[EXIT_LOOPEXIT1:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ -2147483648, [[INNER_LATCH]] ]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit.loopexit1:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[EXIT_PHI:%.*]] = phi i32 [ [[INC_LCSSA]], [[EXIT_LOOPEXIT]] ], [ undef, [[EXIT_LOOPEXIT1]] ]
; CHECK-NEXT: ret void
;
entry:
br label %outer.header
outer.header:
%outer.iv = phi i32 [ 0, %entry ], [ %x, %outer.latch ]
br label %inner.header
inner.header:
%inner.iv = phi i32 [ undef, %outer.header ], [ %inc, %inner.latch ]
%cmp1 = icmp slt i32 %inner.iv, %outer.iv
br i1 %cmp1, label %inner.latch, label %outer.latch
inner.latch:
%inc = add nsw i32 %inner.iv, 1
%cmp2 = icmp slt i32 %inner.iv, %outer.iv
br i1 %cmp2, label %inner.header, label %exit
outer.latch:
br i1 undef, label %outer.header, label %exit
exit:
%exit.phi = phi i32 [ %inc, %inner.latch ], [ undef, %outer.latch ]
ret void
}
define i64 @unconditional_exit_simplification(i64 %arg) {
; CHECK-LABEL: @unconditional_exit_simplification(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP1:%.*]]
; CHECK: loop1:
; CHECK-NEXT: br label [[LOOP2:%.*]]
; CHECK: loop2:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ 0, [[LOOP1]] ], [ 1, [[LOOP2]] ]
; CHECK-NEXT: br i1 true, label [[LOOP2]], label [[LOOP1_LATCH:%.*]]
; CHECK: loop1.latch:
; CHECK-NEXT: [[RES_LCSSA:%.*]] = phi i64 [ [[IV2]], [[LOOP2]] ]
; CHECK-NEXT: br i1 false, label [[LOOP1]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[RES_LCSSA2:%.*]] = phi i64 [ [[RES_LCSSA]], [[LOOP1_LATCH]] ]
; CHECK-NEXT: ret i64 [[RES_LCSSA2]]
;
entry:
br label %loop1
loop1:
%iv1 = phi i64 [ 0, %entry ], [ 1, %loop1.latch ]
br label %loop2
loop2:
%iv2 = phi i64 [ 0, %loop1 ], [ 1, %loop2 ]
%res = add nuw nsw i64 %iv1, %iv2
br i1 true, label %loop2, label %loop1.latch
loop1.latch:
%res.lcssa = phi i64 [ %res, %loop2 ]
br i1 false, label %loop1, label %exit
exit:
%res.lcssa2 = phi i64 [ %res.lcssa, %loop1.latch ]
ret i64 %res.lcssa2
}
; Check that it does not crash because the incoming values of an LCSSA phi are
; equal.
define void @pr57000(i64 %a) {
; CHECK-LABEL: @pr57000(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_1_OUTER:%.*]]
; CHECK: loop.1.loopexit:
; CHECK-NEXT: br label [[LOOP_1_OUTER]]
; CHECK: loop.1.outer:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i64 [[A:%.*]], 2546175499358690212
; CHECK-NEXT: [[CMP_EXT:%.*]] = zext i1 [[CMP]] to i8
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_1]], label [[LOOP_2_HEADER_PREHEADER:%.*]]
; CHECK: loop.2.header.preheader:
; CHECK-NEXT: [[CMP_LCSSA:%.*]] = phi i1 [ [[CMP]], [[LOOP_1]] ]
; CHECK-NEXT: [[CMP_EXT_LCSSA:%.*]] = phi i8 [ [[CMP_EXT]], [[LOOP_1]] ]
; CHECK-NEXT: br label [[LOOP_2_HEADER_OUTER:%.*]]
; CHECK: loop.2.header.outer:
; CHECK-NEXT: br label [[LOOP_2_HEADER:%.*]]
; CHECK: loop.2.header:
; CHECK-NEXT: switch i8 [[CMP_EXT_LCSSA]], label [[LOOP_1_LOOPEXIT:%.*]] [
; CHECK-NEXT: i8 -1, label [[LOOP_2_LATCH:%.*]]
; CHECK-NEXT: i8 1, label [[LOOP_2_LATCH]]
; CHECK-NEXT: i8 4, label [[LOOP_2_HEADER]]
; CHECK-NEXT: ]
; CHECK: loop.2.latch:
; CHECK-NEXT: [[CMP_TRUNC_LCSSA1:%.*]] = phi i1 [ [[CMP_LCSSA]], [[LOOP_2_HEADER]] ], [ [[CMP_LCSSA]], [[LOOP_2_HEADER]] ]
; CHECK-NEXT: call void @use(i1 [[CMP_TRUNC_LCSSA1]])
; CHECK-NEXT: br label [[LOOP_2_HEADER_OUTER]]
;
entry:
br label %loop.1
loop.1:
%p.1 = phi i1 [ 0 , %entry ], [ %p.1, %loop.1 ], [ %p.2, %loop.2.header ]
%cmp = icmp sle i64 %a, 2546175499358690212
%cmp.ext = zext i1 %cmp to i8
br i1 %cmp, label %loop.1, label %loop.2.header
loop.2.header:
%p.2 = phi i1 [ %p.1, %loop.1 ], [ %p.2, %loop.2.header ], [ %cmp, %loop.2.latch ]
%cmp.trunc = trunc i8 %cmp.ext to i1
switch i8 %cmp.ext, label %loop.1 [
i8 -1, label %loop.2.latch
i8 1, label %loop.2.latch
i8 4, label %loop.2.header
]
loop.2.latch:
call void @use(i1 %cmp.trunc)
br label %loop.2.header
}
declare void @use(i1)
|
