59b4074037
The CFG allows us to do layout optimization in the compiler. Furthermore, it allows further branch optimization.
41 lines
982 B
LLVM
41 lines
982 B
LLVM
; BB section test with CFG.
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;
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;; Profile for version 1:
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; RUN: echo 'v1' > %t
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; RUN: echo 'f foo' >> %t
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; RUN: echo 'g 0:10,1:9,2:1 1:8,3:8 2:2,3:2 3:11' >> %t
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; RUN: echo 'c 0 2 3' >> %t
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;
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; RUN: llc < %s -O0 -mtriple=x86_64-pc-linux -function-sections -basic-block-sections=%t | FileCheck %s
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;
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define void @foo(i1 zeroext) nounwind {
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%2 = alloca i8, align 1
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%3 = zext i1 %0 to i8
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store i8 %3, ptr %2, align 1
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%4 = load i8, ptr %2, align 1
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%5 = trunc i8 %4 to i1
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br i1 %5, label %6, label %8
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6: ; preds = %1
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%7 = call i32 @bar()
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br label %10
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8: ; preds = %1
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%9 = call i32 @baz()
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br label %10
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10: ; preds = %8, %6
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ret void
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}
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declare i32 @bar() #1
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declare i32 @baz() #1
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; CHECK: .section .text.foo,"ax",@progbits
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; CHECK: callq baz
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; CHECK: retq
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; CHECK: .section .text.split.foo,"ax",@progbits
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; CHECK: callq bar
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