blob: 9c186f7ea36ade91fc28b2b0596bf37fac657f90 [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/
; RUN: opt < %s -passes=gvn -S | FileCheck %s
; This test checks that we don't hang trying to split a critical edge in scalar
; PRE when the control flow uses a callbr instruction.
define void @wombat(i64 %arg, ptr %arg1, i64 %arg2, ptr %arg3) {
; CHECK-LABEL: @wombat(
; CHECK-NEXT: [[TMP5:%.*]] = or i64 [[ARG2:%.*]], [[ARG:%.*]]
; CHECK-NEXT: callbr void asm sideeffect "", "!i,!i"()
; CHECK-NEXT: to label [[BB6:%.*]] [label [[BB7:%.*]], label %bb.bb9_crit_edge]
; CHECK: bb.bb9_crit_edge:
; CHECK-NEXT: [[DOTPRE:%.*]] = trunc i64 [[TMP5]] to i32
; CHECK-NEXT: br label [[BB9:%.*]]
; CHECK: bb6:
; CHECK-NEXT: br label [[BB7]]
; CHECK: bb7:
; CHECK-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP5]] to i32
; CHECK-NEXT: tail call void @barney(i32 [[TMP8]])
; CHECK-NEXT: br label [[BB9]]
; CHECK: bb9:
; CHECK-NEXT: [[TMP10_PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[BB_BB9_CRIT_EDGE:%.*]] ], [ [[TMP8]], [[BB7]] ]
; CHECK-NEXT: store i32 [[TMP10_PRE_PHI]], ptr [[ARG3:%.*]], align 4
; CHECK-NEXT: ret void
%tmp5 = or i64 %arg2, %arg
callbr void asm sideeffect "", "!i,!i"()
to label %bb6 [label %bb7, label %bb9]
bb6: ; preds = %bb
br label %bb7
bb7: ; preds = %bb6, %bb
%tmp8 = trunc i64 %tmp5 to i32
tail call void @barney(i32 %tmp8)
br label %bb9
bb9: ; preds = %bb7, %bb
%tmp10 = trunc i64 %tmp5 to i32
store i32 %tmp10, ptr %arg3
ret void
declare void @barney(i32)