llvm-6502/test/CodeGen/X86/pr2659.ll
Jakob Stoklund Olesen 08342f2d11 Revert "Disable codegen prepare critical edge splitting. Machine instruction passes now"
This reverts revision 114633. It was breaking llvm-gcc-i386-linux-selfhost.

It seems there is a downstream bug that is exposed by
-cgp-critical-edge-splitting=0. When that bug is fixed, this patch can go back
in.

Note that the changes to tailcallfp2.ll are not reverted. They were good are
required.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114859 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-27 18:43:48 +00:00

40 lines
1.7 KiB
LLVM

; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 | grep movl | count 5
; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 | FileCheck %s
; PR2659
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i686-apple-darwin9.4.0"
define i32 @binomial(i32 %n, i32 %k) nounwind {
entry:
%cmp = icmp ugt i32 %k, %n ; <i1> [#uses=1]
br i1 %cmp, label %ifthen, label %forcond.preheader
forcond.preheader: ; preds = %entry
%cmp44 = icmp eq i32 %k, 0 ; <i1> [#uses=1]
br i1 %cmp44, label %afterfor, label %forbody
; CHECK: %forcond.preheader.forbody_crit_edge
; CHECK: movl $1
; CHECK-NOT: xorl
; CHECK-NEXT: movl
ifthen: ; preds = %entry
ret i32 0
forbody: ; preds = %forbody, %forcond.preheader
%indvar = phi i32 [ 0, %forcond.preheader ], [ %divisor.02, %forbody ] ; <i32> [#uses=3]
%accumulator.01 = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1]
%divisor.02 = add i32 %indvar, 1 ; <i32> [#uses=2]
%n.addr.03 = sub i32 %n, %indvar ; <i32> [#uses=1]
%mul = mul i32 %n.addr.03, %accumulator.01 ; <i32> [#uses=1]
%div = udiv i32 %mul, %divisor.02 ; <i32> [#uses=2]
%inc = add i32 %indvar, 2 ; <i32> [#uses=1]
%cmp4 = icmp ugt i32 %inc, %k ; <i1> [#uses=1]
br i1 %cmp4, label %afterfor, label %forbody
afterfor: ; preds = %forbody, %forcond.preheader
%accumulator.0.lcssa = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1]
ret i32 %accumulator.0.lcssa
}