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