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Merge pull request #875 from cpunion/fix-alloc-in-loop
Reduce alloca
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| package main | ||
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| func Foo(s string) int { | ||
| return len(s) | ||
| } | ||
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| func Test() { | ||
| j := 0 | ||
| for i := 0; i < 10000000; i++ { | ||
| j += Foo("hello") | ||
| } | ||
| println(j) | ||
| } | ||
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||
| func main() { | ||
| Test() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| ; ModuleID = 'main' | ||
| source_filename = "main" | ||
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| %"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 } | ||
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| @"main.init$guard" = global i1 false, align 1 | ||
| @0 = private unnamed_addr constant [5 x i8] c"hello", align 1 | ||
| @__llgo_argc = global i32 0, align 4 | ||
| @__llgo_argv = global ptr null, align 8 | ||
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| define i64 @main.Foo(%"github.com/goplus/llgo/internal/runtime.String" %0) { | ||
| _llgo_0: | ||
| %1 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %0, 1 | ||
| ret i64 %1 | ||
| } | ||
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| define void @main.Test() { | ||
| _llgo_0: | ||
| br label %_llgo_3 | ||
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| _llgo_1: ; preds = %_llgo_3 | ||
| %0 = call i64 @main.Foo(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 5 }) | ||
| %1 = add i64 %3, %0 | ||
| %2 = add i64 %4, 1 | ||
| br label %_llgo_3 | ||
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| _llgo_2: ; preds = %_llgo_3 | ||
| call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %3) | ||
| call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10) | ||
| ret void | ||
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| _llgo_3: ; preds = %_llgo_1, %_llgo_0 | ||
| %3 = phi i64 [ 0, %_llgo_0 ], [ %1, %_llgo_1 ] | ||
| %4 = phi i64 [ 0, %_llgo_0 ], [ %2, %_llgo_1 ] | ||
| %5 = icmp slt i64 %4, 10000000 | ||
| br i1 %5, label %_llgo_1, label %_llgo_2 | ||
| } | ||
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| define void @main.init() { | ||
| _llgo_0: | ||
| %0 = load i1, ptr @"main.init$guard", align 1 | ||
| br i1 %0, label %_llgo_2, label %_llgo_1 | ||
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| _llgo_1: ; preds = %_llgo_0 | ||
| store i1 true, ptr @"main.init$guard", align 1 | ||
| br label %_llgo_2 | ||
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| _llgo_2: ; preds = %_llgo_1, %_llgo_0 | ||
| ret void | ||
| } | ||
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| define i32 @main(i32 %0, ptr %1) { | ||
| _llgo_0: | ||
| store i32 %0, ptr @__llgo_argc, align 4 | ||
| store ptr %1, ptr @__llgo_argv, align 8 | ||
| call void @"github.com/goplus/llgo/internal/runtime.init"() | ||
| call void @main.init() | ||
| call void @main.Test() | ||
| ret i32 0 | ||
| } | ||
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| declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64) | ||
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| declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8) | ||
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| declare void @"github.com/goplus/llgo/internal/runtime.init"() |
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