llvm-for-llvmta/test/Transforms/LoopStrengthReduce/callbr-critical-edge-splitt...

62 lines
2.3 KiB
LLVM

; RUN: opt -passes='loop(loop-reduce)' %s -o - -S | FileCheck %s
; Required metadata to trigger previously failing assertion.
target datalayout = "e-m:e-i64:64-n32:64"
@f = external dso_local local_unnamed_addr global i32, align 4
declare i32 @a() local_unnamed_addr
declare i32 @e(i32) local_unnamed_addr
define dso_local i32 @b() {
entry:
%call = tail call i32 @a()
%tobool.not = icmp eq i32 %call, 0
br i1 %tobool.not, label %cleanup.cont.critedge, label %if.then
if.then: ; preds = %entry
; It's ok to modify this test in the future should be able to split critical
; edges here, just noting that this is the critical edge that we care about.
; CHECK: callbr void asm sideeffect "", "X"(i8* blockaddress(@b, %cleanup.cont.critedge))
; CHECK-NEXT: to label %return [label %cleanup.cont.critedge]
callbr void asm sideeffect "", "X"(i8* blockaddress(@b, %cleanup.cont.critedge))
to label %return [label %cleanup.cont.critedge]
cleanup.cont.critedge: ; preds = %entry, %if.then
br label %return
return: ; preds = %if.then, %cleanup.cont.critedge
%retval.0 = phi i32 [ 4, %cleanup.cont.critedge ], [ 0, %if.then ]
ret i32 %retval.0
}
define dso_local i32 @do_pages_move_nr_pages() local_unnamed_addr {
entry:
br label %for.cond
for.cond: ; preds = %if.end3, %entry
%g.0 = phi i32 [ undef, %entry ], [ %inc, %if.end3 ]
%0 = load i32, i32* @f, align 4
%tobool.not = icmp eq i32 %0, 0
br i1 %tobool.not, label %if.end3, label %if.then
if.then: ; preds = %for.cond
%call.i = tail call i32 @a()
%tobool.not.i = icmp eq i32 %call.i, 0
br i1 %tobool.not.i, label %if.then2, label %if.then.i
if.then.i: ; preds = %if.then
callbr void asm sideeffect "", "X"(i8* blockaddress(@do_pages_move_nr_pages, %if.then2))
to label %if.end3 [label %if.then2]
if.then2: ; preds = %if.then, %if.then.i
%g.0.lcssa = phi i32 [ %g.0, %if.then ], [ %g.0, %if.then.i ]
%call4 = tail call i32 @e(i32 %g.0.lcssa)
ret i32 undef
if.end3: ; preds = %for.cond, %if.then.i
%inc = add nsw i32 %g.0, 1
br label %for.cond
}