forked from OSchip/llvm-project
59 lines
2.1 KiB
LLVM
59 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -passes='loop-mssa(indvars,indvars)' -S < %s | FileCheck %s
|
|
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@c = external global i16, align 1
|
|
@a = external global i16, align 1
|
|
|
|
; When we delete %c.promoted, we need to ensure we clear the getSCEVAtScope
|
|
; cache or we'll crash trying to access loop disposition of the exit value
|
|
; for the remaining IV.
|
|
define void @f() {
|
|
; CHECK-LABEL: @f(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_BODY:%.*]], label [[FOR_END4:%.*]]
|
|
; CHECK: for.body:
|
|
; CHECK-NEXT: br label [[FOR_BODY2:%.*]]
|
|
; CHECK: for.body2:
|
|
; CHECK-NEXT: [[INC2:%.*]] = phi i16 [ undef, [[FOR_BODY]] ], [ [[INC:%.*]], [[FOR_BODY2]] ]
|
|
; CHECK-NEXT: [[INC]] = add nsw i16 [[INC2]], 1
|
|
; CHECK-NEXT: store i16 [[INC]], i16* undef, align 1
|
|
; CHECK-NEXT: br i1 true, label [[FOR_BODY2]], label [[CRIT_EDGE:%.*]]
|
|
; CHECK: crit_edge:
|
|
; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i16 [ [[INC]], [[FOR_BODY2]] ]
|
|
; CHECK-NEXT: store i16 [[INC_LCSSA]], i16* @a, align 1
|
|
; CHECK-NEXT: unreachable
|
|
; CHECK: for.end4:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %entry
|
|
br i1 false, label %for.body, label %for.end4
|
|
|
|
for.body: ; preds = %for.cond
|
|
%c.promoted = load i16, i16* @c, align 1
|
|
br label %for.body2
|
|
|
|
for.body2: ; preds = %for.body2, %for.body
|
|
%inc33 = phi i16 [ %c.promoted, %for.body ], [ %inc3, %for.body2 ]
|
|
%inc2 = phi i16 [ undef, %for.body ], [ %inc, %for.body2 ]
|
|
%inc = add nsw i16 %inc2, 1
|
|
store i16 %inc, i16* undef, align 1
|
|
%inc3 = add nsw i16 %inc33, 1
|
|
%tobool = icmp ne i16 %inc3, 0
|
|
br i1 %tobool, label %for.body2, label %crit_edge
|
|
|
|
crit_edge: ; preds = %for.body2
|
|
%inc.lcssa = phi i16 [ %inc, %for.body2 ]
|
|
store i16 %inc.lcssa, i16* @a, align 1
|
|
unreachable
|
|
|
|
for.end4: ; preds = %for.cond
|
|
ret void
|
|
}
|