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llvm/test/CodeGen/X86/lsr-delayed-fold.ll
Dan Gohman 25fcaff409 LSR needs to remember inserted instructions even in postinc mode, because 
there could be multiple subexpressions within a single expansion which
require insert point adjustment. This fixes PR7306.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105510 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-05 00:33:07 +00:00

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; RUN: llc -march=x86-64 < %s > /dev/null
; ScalarEvolution misses an opportunity to fold ((trunc x) + (trunc -x) + y),
; but LSR should tolerate this.
; rdar://7886751
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"
target triple = "x86_64-apple-darwin11.0"
define fastcc void @formatValue(i64 %arg5) nounwind {
bb12: ; preds = %bb11
%t = trunc i64 %arg5 to i32 ; <i32> [#uses=1]
%t13 = sub i64 0, %arg5 ; <i64> [#uses=1]
%t14 = and i64 %t13, 4294967295 ; <i64> [#uses=1]
br label %bb15
bb15: ; preds = %bb21, %bb12
%t16 = phi i64 [ 0, %bb12 ], [ %t23, %bb15 ] ; <i64> [#uses=2]
%t17 = mul i64 %t14, %t16 ; <i64> [#uses=1]
%t18 = add i64 undef, %t17 ; <i64> [#uses=1]
%t19 = trunc i64 %t18 to i32 ; <i32> [#uses=1]
%t22 = icmp eq i32 %t19, %t ; <i1> [#uses=1]
%t23 = add i64 %t16, 1 ; <i64> [#uses=1]
br i1 %t22, label %bb24, label %bb15
bb24: ; preds = %bb21, %bb11
unreachable
}
; ScalarEvolution should be able to correctly expand the crazy addrec here.
; PR6914
define void @int323() nounwind {
entry:
br label %for.cond
for.cond: ; preds = %lbl_264, %for.inc, %entry
%g_263.tmp.1 = phi i8 [ undef, %entry ], [ %g_263.tmp.1, %for.cond ]
%p_95.addr.0 = phi i8 [ 0, %entry ], [ %add, %for.cond ]
%add = add i8 %p_95.addr.0, 1 ; <i8> [#uses=1]
br i1 undef, label %for.cond, label %lbl_264
lbl_264: ; preds = %if.end, %lbl_264.preheader
%g_263.tmp.0 = phi i8 [ %g_263.tmp.1, %for.cond ] ; <i8> [#uses=1]
%tmp7 = load i16* undef ; <i16> [#uses=1]
%conv8 = trunc i16 %tmp7 to i8 ; <i8> [#uses=1]
%mul.i = mul i8 %p_95.addr.0, %p_95.addr.0 ; <i8> [#uses=1]
%mul.i18 = mul i8 %mul.i, %conv8 ; <i8> [#uses=1]
%tobool12 = icmp eq i8 %mul.i18, 0 ; <i1> [#uses=1]
unreachable
}
; LSR ends up going into conservative pruning mode; don't prune the solution
; so far that it becomes unsolvable though.
; PR7077
%struct.Bu = type { i32, i32, i32 }
define void @_Z3fooP2Bui(%struct.Bu* nocapture %bu) {
entry:
br label %for.body
for.body: ; preds = %for.inc131, %entry
%indvar = phi i64 [ %indvar.next, %for.inc131 ], [ 0, %entry ] ; <i64> [#uses=3]
br i1 undef, label %for.inc131, label %lor.lhs.false
lor.lhs.false: ; preds = %for.body
%tmp15 = add i64 %indvar, 1 ; <i64> [#uses=1]
%tmp17 = add i64 %indvar, 2 ; <i64> [#uses=1]
%tmp19 = add i64 %indvar, 3 ; <i64> [#uses=1]
%tmp21 = add i64 %indvar, 4 ; <i64> [#uses=1]
%tmp23 = add i64 %indvar, 5 ; <i64> [#uses=1]
%tmp25 = add i64 %indvar, 6 ; <i64> [#uses=1]
%tmp27 = add i64 %indvar, 7 ; <i64> [#uses=1]
%tmp29 = add i64 %indvar, 8 ; <i64> [#uses=1]
%tmp31 = add i64 %indvar, 9 ; <i64> [#uses=1]
%tmp35 = add i64 %indvar, 11 ; <i64> [#uses=1]
%tmp37 = add i64 %indvar, 12 ; <i64> [#uses=1]
%tmp39 = add i64 %indvar, 13 ; <i64> [#uses=1]
%tmp41 = add i64 %indvar, 14 ; <i64> [#uses=1]
%tmp43 = add i64 %indvar, 15 ; <i64> [#uses=1]
%tmp45 = add i64 %indvar, 16 ; <i64> [#uses=1]
%tmp47 = add i64 %indvar, 17 ; <i64> [#uses=1]
%mul = trunc i64 %indvar to i32 ; <i32> [#uses=1]
%add22 = trunc i64 %tmp15 to i32 ; <i32> [#uses=1]
%add28 = trunc i64 %tmp17 to i32 ; <i32> [#uses=1]
%add34 = trunc i64 %tmp19 to i32 ; <i32> [#uses=1]
%add40 = trunc i64 %tmp21 to i32 ; <i32> [#uses=1]
%add46 = trunc i64 %tmp23 to i32 ; <i32> [#uses=1]
%add52 = trunc i64 %tmp25 to i32 ; <i32> [#uses=1]
%add58 = trunc i64 %tmp27 to i32 ; <i32> [#uses=1]
%add64 = trunc i64 %tmp29 to i32 ; <i32> [#uses=1]
%add70 = trunc i64 %tmp31 to i32 ; <i32> [#uses=1]
%add82 = trunc i64 %tmp35 to i32 ; <i32> [#uses=1]
%add88 = trunc i64 %tmp37 to i32 ; <i32> [#uses=1]
%add94 = trunc i64 %tmp39 to i32 ; <i32> [#uses=1]
%add100 = trunc i64 %tmp41 to i32 ; <i32> [#uses=1]
%add106 = trunc i64 %tmp43 to i32 ; <i32> [#uses=1]
%add112 = trunc i64 %tmp45 to i32 ; <i32> [#uses=1]
%add118 = trunc i64 %tmp47 to i32 ; <i32> [#uses=1]
%tmp10 = getelementptr %struct.Bu* %bu, i64 %indvar, i32 2 ; <i32*> [#uses=1]
%tmp11 = load i32* %tmp10 ; <i32> [#uses=0]
tail call void undef(i32 %add22)
tail call void undef(i32 %add28)
tail call void undef(i32 %add34)
tail call void undef(i32 %add40)
tail call void undef(i32 %add46)
tail call void undef(i32 %add52)
tail call void undef(i32 %add58)
tail call void undef(i32 %add64)
tail call void undef(i32 %add70)
tail call void undef(i32 %add82)
tail call void undef(i32 %add88)
tail call void undef(i32 %add94)
tail call void undef(i32 %add100)
tail call void undef(i32 %add106)
tail call void undef(i32 %add112)
tail call void undef(i32 %add118)
br label %for.body123
for.body123: ; preds = %for.body123, %lor.lhs.false
%j.03 = phi i32 [ 0, %lor.lhs.false ], [ %inc, %for.body123 ] ; <i32> [#uses=2]
%add129 = add i32 %mul, %j.03 ; <i32> [#uses=1]
tail call void undef(i32 %add129)
%inc = add nsw i32 %j.03, 1 ; <i32> [#uses=1]
br i1 undef, label %for.inc131, label %for.body123
for.inc131: ; preds = %for.body123, %for.body
%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
br i1 undef, label %for.end134, label %for.body
for.end134: ; preds = %for.inc131
ret void
}
; LSR needs to remember inserted instructions even in postinc mode, because
; there could be multiple subexpressions within a single expansion which
; require insert point adjustment.
; PR7306
define fastcc i32 @GetOptimum() nounwind {
bb:
br label %bb1
bb1: ; preds = %bb1, %bb
%t = phi i32 [ 0, %bb ], [ %t2, %bb1 ] ; <i32> [#uses=1]
%t2 = add i32 %t, undef ; <i32> [#uses=3]
br i1 undef, label %bb1, label %bb3
bb3: ; preds = %bb1
%t4 = add i32 undef, -1 ; <i32> [#uses=1]
br label %bb5
bb5: ; preds = %bb16, %bb3
%t6 = phi i32 [ %t17, %bb16 ], [ 0, %bb3 ] ; <i32> [#uses=3]
%t7 = add i32 undef, %t6 ; <i32> [#uses=2]
%t8 = add i32 %t4, %t6 ; <i32> [#uses=1]
br i1 undef, label %bb9, label %bb10
bb9: ; preds = %bb5
br label %bb10
bb10: ; preds = %bb9, %bb5
br i1 undef, label %bb11, label %bb16
bb11: ; preds = %bb10
%t12 = icmp ugt i32 %t7, %t2 ; <i1> [#uses=1]
%t13 = select i1 %t12, i32 %t2, i32 %t7 ; <i32> [#uses=1]
br label %bb14
bb14: ; preds = %bb11
store i32 %t13, i32* null
ret i32 %t8
bb16: ; preds = %bb10
%t17 = add i32 %t6, 1 ; <i32> [#uses=1]
br label %bb5
}
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