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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -asm-verbose=false | FileCheck %s
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-win32 -asm-verbose=false | FileCheck %s
; LSR's OptimizeMax should eliminate the select (max).
; CHECK-LABEL: foo:
; CHECK-NOT: cmov
; CHECK: jle
define void @foo(i64 %n, double* nocapture %p) nounwind {
entry:
%cmp6 = icmp slt i64 %n, 0 ; <i1> [#uses=1]
br i1 %cmp6, label %for.end, label %for.body.preheader
for.body.preheader: ; preds = %entry
%tmp = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
%n.op = add i64 %n, 1 ; <i64> [#uses=1]
%tmp1 = select i1 %tmp, i64 %n.op, i64 1 ; <i64> [#uses=1]
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%i = phi i64 [ %i.next, %for.body ], [ 0, %for.body.preheader ] ; <i64> [#uses=2]
%arrayidx = getelementptr double* %p, i64 %i ; <double*> [#uses=2]
%t4 = load double* %arrayidx ; <double> [#uses=1]
%mul = fmul double %t4, 2.200000e+00 ; <double> [#uses=1]
store double %mul, double* %arrayidx
%i.next = add nsw i64 %i, 1 ; <i64> [#uses=2]
%exitcond = icmp eq i64 %i.next, %tmp1 ; <i1> [#uses=1]
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret void
}
; In this case, one of the max operands is another max, which folds,
; leaving a two-operand max which doesn't fit the usual pattern.
; OptimizeMax should handle this case.
; PR7454
; CHECK-LABEL: _Z18GenerateStatusPagei:
; CHECK: jle
; CHECK-NOT: cmov
; CHECK: xorl {{%edi, %edi|%ecx, %ecx|%eax, %eax}}
; CHECK-NEXT: align
; CHECK-NEXT: BB1_2:
; CHECK: callq
; CHECK-NEXT: incl [[BX:%[a-z0-9]+]]
; CHECK-NEXT: cmpl [[R14:%[a-z0-9]+]], [[BX]]
; CHECK: jl
define void @_Z18GenerateStatusPagei(i32 %jobs_to_display) nounwind {
entry:
%cmp.i = icmp sgt i32 %jobs_to_display, 0 ; <i1> [#uses=1]
%tmp = select i1 %cmp.i, i32 %jobs_to_display, i32 0 ; <i32> [#uses=3]
%cmp8 = icmp sgt i32 %tmp, 0 ; <i1> [#uses=1]
br i1 %cmp8, label %bb.nph, label %for.end
bb.nph: ; preds = %entry
%tmp11 = icmp sgt i32 %tmp, 1 ; <i1> [#uses=1]
%smax = select i1 %tmp11, i32 %tmp, i32 1 ; <i32> [#uses=1]
br label %for.body
for.body: ; preds = %for.body, %bb.nph
%i.010 = phi i32 [ 0, %bb.nph ], [ %inc, %for.body ] ; <i32> [#uses=1]
%it.0.09 = phi float* [ null, %bb.nph ], [ %call.i, %for.body ] ; <float*> [#uses=1]
%call.i = call float* @_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base(float* %it.0.09) ; <float*> [#uses=1]
%inc = add nsw i32 %i.010, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %inc, %smax ; <i1> [#uses=1]
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret void
}
declare float* @_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base(float*)
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