75f34af99c
Summary: If a receive case in a select statement is not assigned to a named variable, then we can eliminate the alloca and copy at runtime. Test Plan: lit test added Reviewers: pcc Reviewed By: pcc Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D6785 llvm-svn: 225033
19 lines
334 B
Go
19 lines
334 B
Go
// RUN: llgo -S -emit-llvm -o - %s | FileCheck %s
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package foo
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// CHECK-NOT: alloca [1024 x i8]
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// CHECK-NOT: alloca [2048 x i8]
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// CHECK: alloca [4096 x i8]
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func F() {
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ch1 := make(chan [1024]byte)
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ch2 := make(chan [2048]byte)
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ch3 := make(chan [4096]byte)
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select {
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case <-ch1:
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case _ = <-ch2:
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case x := <-ch3:
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_ = x[0]
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}
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}
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