1 ; RUN: llc < %s -mtriple=x86_64-linux -asm-verbose=false | FileCheck %s
2 ; RUN: llc < %s -mtriple=x86_64-win32 -asm-verbose=false | FileCheck %s
4 ; LSR's OptimizeMax should eliminate the select (max).
10 define void @foo(i64 %n, double* nocapture %p) nounwind {
12 %cmp6 = icmp slt i64 %n, 0 ; <i1> [#uses=1]
13 br i1 %cmp6, label %for.end, label %for.body.preheader
15 for.body.preheader: ; preds = %entry
16 %tmp = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
17 %n.op = add i64 %n, 1 ; <i64> [#uses=1]
18 %tmp1 = select i1 %tmp, i64 %n.op, i64 1 ; <i64> [#uses=1]
21 for.body: ; preds = %for.body.preheader, %for.body
22 %i = phi i64 [ %i.next, %for.body ], [ 0, %for.body.preheader ] ; <i64> [#uses=2]
23 %arrayidx = getelementptr double* %p, i64 %i ; <double*> [#uses=2]
24 %t4 = load double* %arrayidx ; <double> [#uses=1]
25 %mul = fmul double %t4, 2.200000e+00 ; <double> [#uses=1]
26 store double %mul, double* %arrayidx
27 %i.next = add nsw i64 %i, 1 ; <i64> [#uses=2]
28 %exitcond = icmp eq i64 %i.next, %tmp1 ; <i1> [#uses=1]
29 br i1 %exitcond, label %for.end, label %for.body
31 for.end: ; preds = %for.body, %entry
35 ; In this case, one of the max operands is another max, which folds,
36 ; leaving a two-operand max which doesn't fit the usual pattern.
37 ; OptimizeMax should handle this case.
40 ; CHECK: _Z18GenerateStatusPagei:
44 ; CHECK: xorl {{%edi, %edi|%ecx, %ecx}}
48 ; CHECK-NEXT: incl [[BX:%[a-z0-9]+]]
49 ; CHECK-NEXT: cmpl [[R14:%[a-z0-9]+]], [[BX]]
50 ; CHECK-NEXT: movq %rax, %r{{di|cx}}
53 define void @_Z18GenerateStatusPagei(i32 %jobs_to_display) nounwind {
55 %cmp.i = icmp sgt i32 %jobs_to_display, 0 ; <i1> [#uses=1]
56 %tmp = select i1 %cmp.i, i32 %jobs_to_display, i32 0 ; <i32> [#uses=3]
57 %cmp8 = icmp sgt i32 %tmp, 0 ; <i1> [#uses=1]
58 br i1 %cmp8, label %bb.nph, label %for.end
60 bb.nph: ; preds = %entry
61 %tmp11 = icmp sgt i32 %tmp, 1 ; <i1> [#uses=1]
62 %smax = select i1 %tmp11, i32 %tmp, i32 1 ; <i32> [#uses=1]
65 for.body: ; preds = %for.body, %bb.nph
66 %i.010 = phi i32 [ 0, %bb.nph ], [ %inc, %for.body ] ; <i32> [#uses=1]
67 %it.0.09 = phi float* [ null, %bb.nph ], [ %call.i, %for.body ] ; <float*> [#uses=1]
68 %call.i = call float* @_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base(float* %it.0.09) ; <float*> [#uses=1]
69 %inc = add nsw i32 %i.010, 1 ; <i32> [#uses=2]
70 %exitcond = icmp eq i32 %inc, %smax ; <i1> [#uses=1]
71 br i1 %exitcond, label %for.end, label %for.body
73 for.end: ; preds = %for.body, %entry
77 declare float* @_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base(float*)