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| author | Jessica Paquette <jpaquette@apple.com> | 2017-12-09 00:43:49 +0000 |
|---|---|---|
| committer | Jessica Paquette <jpaquette@apple.com> | 2017-12-09 00:43:49 +0000 |
| commit | ce39caef81ecf0369ae4fa382c6f40c7409a08b4 (patch) | |
| tree | 12cf16ffcc74a127efa0921020f7d59090a23181 /test/CodeGen/AArch64 | |
| parent | 45db4ee0fc2be6272020a21a1eb90b8078ecc7d3 (diff) | |
[MachineOutliner] Outline calls
The outliner previously would never outline calls. Calls are pretty common in
files, so it makes sense to outline them. In fact, in the LLVM test suite, if
you count the number of instructions that the outliner misses when you outline
calls vs when you don't, it turns out that, on average, around 6% of the
instructions encountered are calls. So, if we outline calls, we can find more
candidates, and thus save some more space.
This commit adds that functionality and updates the mir test to reflect that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320229 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/AArch64')
| -rw-r--r-- | test/CodeGen/AArch64/machine-outliner.mir | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/machine-outliner.mir b/test/CodeGen/AArch64/machine-outliner.mir index ee3daf11c9f..708e2e42880 100644 --- a/test/CodeGen/AArch64/machine-outliner.mir +++ b/test/CodeGen/AArch64/machine-outliner.mir @@ -1,6 +1,10 @@ # RUN: llc -mtriple=aarch64--- -run-pass=machine-outliner %s -o - | FileCheck %s --- | + define void @baz() #0 { + ret void + } + define i32 @main() #0 { ret i32 0 } @@ -80,6 +84,7 @@ body: | --- # This test ensures that we can avoid saving LR when it's available. # CHECK-LABEL: bb.1: +# CHECK-NOT: BL @baz, implicit-def dead %lr, implicit %sp # CHECK: BL @OUTLINED_FUNCTION_[[F1:[0-9]+]], implicit-def %lr, implicit %sp # CHECK-NEXT: %w17 = ORRWri %wzr, 2 # CHECK-NEXT: BL @OUTLINED_FUNCTION_[[F1]], implicit-def %lr, implicit %sp @@ -93,15 +98,19 @@ body: | %fp = frame-setup ADDXri %sp, 16, 0 bb.1: + BL @baz, implicit-def dead %lr, implicit %sp %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 + BL @baz, implicit-def dead %lr, implicit %sp %w17 = ORRWri %wzr, 2 + BL @baz, implicit-def dead %lr, implicit %sp %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 %w17 = ORRWri %wzr, 1 + BL @baz, implicit-def dead %lr, implicit %sp %w8 = ORRWri %wzr, 0 bb.2: @@ -110,6 +119,13 @@ body: | RET undef %lr ... +--- +name: baz +tracksRegLiveness: true +body: | + bb.0: + liveins: %w0, %lr, %w8 + RET undef %lr # CHECK-LABEL: name: OUTLINED_FUNCTION_{{[0-9]}} # CHECK=LABEL: name: OUTLINED_FUNCTION_{{[1-9]}} |