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; RUN: llc < %s -march=x86-64 -mcpu=corei7-avx -disable-lsr -pre-RA-sched=source -enable-misched -verify-machineinstrs | FileCheck %s
; Verify that TEST+JE are scheduled together.
; CHECK: test_je
; CHECK: %loop
; CHECK: test
; CHECK-NEXT: je
define void @test_je() {
entry:
br label %loop
loop:
%var = phi i32* [ null, %entry ], [ %next.load, %loop1 ], [ %var, %loop2 ]
%next.ptr = phi i32** [ null, %entry ], [ %next.ptr, %loop1 ], [ %gep, %loop2 ]
br label %loop1
loop1:
%cond = icmp eq i32* %var, null
%next.load = load i32*, i32** %next.ptr
br i1 %cond, label %loop, label %loop2
loop2: ; preds = %loop1
%gep = getelementptr inbounds i32*, i32** %next.ptr, i32 1
store i32* %next.load, i32** undef
br label %loop
}
; Verify that DEC+JE are scheduled together.
; CHECK: dec_je
; CHECK: %loop1
; CHECK: dec
; CHECK-NEXT: je
define void @dec_je() {
entry:
br label %loop
loop:
%var = phi i32 [ 0, %entry ], [ %next.var, %loop1 ], [ %var2, %loop2 ]
%next.ptr = phi i32** [ null, %entry ], [ %next.ptr, %loop1 ], [ %gep, %loop2 ]
br label %loop1
loop1:
%var2 = sub i32 %var, 1
%cond = icmp eq i32 %var2, 0
%next.load = load i32*, i32** %next.ptr
%next.var = load i32, i32* %next.load
br i1 %cond, label %loop, label %loop2
loop2:
%gep = getelementptr inbounds i32*, i32** %next.ptr, i32 1
store i32* %next.load, i32** undef
br label %loop
}
; DEC+JS should *not* be scheduled together.
; CHECK: dec_js
; CHECK: %loop1
; CHECK: dec
; CHECK: mov
; CHECK: js
define void @dec_js() {
entry:
br label %loop2a
loop2a: ; preds = %loop1, %body, %entry
%var = phi i32 [ 0, %entry ], [ %next.var, %loop1 ], [ %var2, %loop2b ]
%next.ptr = phi i32** [ null, %entry ], [ %next.ptr, %loop1 ], [ %gep, %loop2b ]
br label %loop1
loop1: ; preds = %loop2a, %loop2b
%var2 = sub i32 %var, 1
%cond = icmp slt i32 %var2, 0
%next.load = load i32*, i32** %next.ptr
%next.var = load i32, i32* %next.load
br i1 %cond, label %loop2a, label %loop2b
loop2b: ; preds = %loop1
%gep = getelementptr inbounds i32*, i32** %next.ptr, i32 1
store i32* %next.load, i32** undef
br label %loop2a
}
; Verify that CMP+JB are scheduled together.
; CHECK: cmp_jb
; CHECK: %loop1
; CHECK: cmp
; CHECK-NEXT: jb
define void @cmp_jb(i32 %n) {
entry:
br label %loop2a
loop2a: ; preds = %loop1, %body, %entry
%var = phi i32 [ 0, %entry ], [ %next.var, %loop1 ], [ %var2, %loop2b ]
%next.ptr = phi i32** [ null, %entry ], [ %next.ptr, %loop1 ], [ %gep, %loop2b ]
br label %loop1
loop1: ; preds = %loop2a, %loop2b
%var2 = sub i32 %var, 1
%cond = icmp ult i32 %var2, %n
%next.load = load i32*, i32** %next.ptr
%next.var = load i32, i32* %next.load
br i1 %cond, label %loop2a, label %loop2b
loop2b: ; preds = %loop1
%gep = getelementptr inbounds i32*, i32** %next.ptr, i32 1
store i32* %next.load, i32** undef
br label %loop2a
}
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