derek.holloway
7502bf64a4
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69 lines
2.4 KiB
LLVM
69 lines
2.4 KiB
LLVM
; This test verifies whether we can outline a singleton instance (i.e., an instance that does not repeat)
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; using codegen data that has been read from a previous codegen run.
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; When multiple matches occur, we prioritize the candidates using the global frequency.
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; RUN: split-file %s %t
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; First, we generate the cgdata file from local outline instances present in write1.ll and write2.ll
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; RUN: llc -mtriple=arm64-apple-darwin -enable-machine-outliner -codegen-data-generate=true -filetype=obj %t/write1.ll -o %t_write1
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; RUN: llc -mtriple=arm64-apple-darwin -enable-machine-outliner -codegen-data-generate=true -filetype=obj %t/write2.ll -o %t_write2
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; RUN: llvm-cgdata --merge %t_write1 %t_write2 -o %t_cgdata
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; RUN: llvm-cgdata --show %t_cgdata | FileCheck %s --check-prefix=SHOW
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; SHOW: Outlined hash tree:
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; SHOW-NEXT: Total Node Count: 8
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; SHOW-NEXT: Terminal Node Count: 2
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; SHOW-NEXT: Depth: 4
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; Now, we read the cgdata in the machine outliner, enabling us to optimistically
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; outline a singleton instance in read.ll that matches against the cgdata.
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; There are two matches -- (1) (mov #1, mov #2, mov #3, b) and (2) (mov #2, mov #3, b).
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; Even though sequence (1) is longer than sequence (2), the latter is outlined because it occurs more frequently in the outlined hash tree.
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; RUN: llc -mtriple=arm64-apple-darwin -enable-machine-outliner -codegen-data-use-path=%t_cgdata -filetype=obj %t/read.ll -o %t_read
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; RUN: llvm-objdump -d %t_read | FileCheck %s
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; CHECK: _OUTLINED_FUNCTION
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; CHECK-NEXT: mov
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; CHECK-NEXT: mov
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; CHECK-NEXT: b
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;--- write1.ll
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; The sequence (mov #2, mov #3, b) are repeated 4 times.
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declare i32 @g(i32, i32, i32)
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define i32 @f1() minsize {
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%1 = call i32 @g(i32 10, i32 50, i32 2, i32 3);
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ret i32 %1
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}
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define i32 @f2() minsize {
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%1 = call i32 @g(i32 20, i32 60, i32 2, i32 3);
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ret i32 %1
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}
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define i32 @f3() minsize {
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%1 = call i32 @g(i32 30, i32 70, i32 2, i32 3);
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ret i32 %1
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}
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define i32 @f4() minsize {
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%1 = call i32 @g(i32 40, i32 80, i32 2, i32 3);
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ret i32 %1
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}
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;--- write2.ll
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; The sequence (mov #1, mov #2, mov #3, b) are repeated 2 times.
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declare i32 @g(i32, i32, i32)
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define i32 @f6() minsize {
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%1 = call i32 @g(i32 10, i32 1, i32 2, i32 3);
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ret i32 %1
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}
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define i32 @f7() minsize {
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%1 = call i32 @g(i32 20, i32 1, i32 2, i32 3);
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ret i32 %1
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}
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;--- read.ll
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declare i32 @g(i32, i32, i32)
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define i32 @f3() minsize {
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%1 = call i32 @g(i32 30, i32 1, i32 2, i32 3);
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ret i32 %1
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}
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