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e2c4ce9596
Summary: Inlining threshold is increased by application of bonuses when the callee has a single reachable basic block or is rich in vector instructions. Similarly, inlining cost is reduced by applying a large bonus when the last call to a static function is considered for inlining. This patch disables the application of these bonuses when the callsite or the callee is cold. The intention here is to prevent a large cold callsite from being inlined to a non-cold caller that could prevent the caller from being inlined. This is especially important when the cold callsite is a last call to a static since the associated bonus is very high. Reviewers: chandlerc, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: https://reviews.llvm.org/D35823 llvm-svn: 309441
48 lines
1.4 KiB
LLVM
48 lines
1.4 KiB
LLVM
; The code in this test is very similar to vector-bonus.ll except for
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; the fact that the call to bar is cold thereby preventing the application of
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; the vector bonus.
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; RUN: opt < %s -inline -inline-threshold=35 -S | FileCheck %s
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; RUN: opt < %s -passes='cgscc(inline)' -inline-threshold=35 -S | FileCheck %s
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define i32 @bar(<4 x i32> %v, i32 %i) #0 {
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entry:
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%cmp = icmp sgt i32 %i, 4
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%mul1 = mul nsw i32 %i, %i
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br label %return
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if.else: ; preds = %entry
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%add1 = add nsw i32 %i, %i
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%add2 = add nsw i32 %i, %i
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%add3 = add nsw i32 %i, %i
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%add4 = add nsw i32 %i, %i
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%add5 = add nsw i32 %i, %i
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%add6 = add nsw i32 %i, %i
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%vecext = extractelement <4 x i32> %v, i32 0
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%vecext7 = extractelement <4 x i32> %v, i32 1
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%add7 = add nsw i32 %vecext, %vecext7
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br label %return
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return: ; preds = %if.else, %if.then
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%retval.0 = phi i32 [ %mul1, %if.then ], [ %add7, %if.else ]
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ret i32 %retval.0
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}
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define i32 @foo(<4 x i32> %v, i32 %a) #1 {
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; CHECK-LABEL: @foo(
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; CHECK-NOT: call i32 @bar
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; CHECK: ret
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entry:
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%cmp = icmp eq i32 %a, 0
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br i1 %cmp, label %callbb, label %ret
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callbb:
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%call = call i32 @bar(<4 x i32> %v, i32 %a)
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br label %ret
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ret:
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%call1 = phi i32 [%call, %callbb], [0, %entry]
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ret i32 %call1
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}
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