9ec7b025cf
This patch adds some statistics to the jump-table-to-switch pass. This will make it easier to see in aggregate how changing the profitability heuristics impacts how often the optimization fires.
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes=jump-table-to-switch -stats -disable-output -jump-table-to-switch-function-size-threshold=3 2>&1 | FileCheck %s
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; CHECK: 2 jump-table-to-switch - The number of jump tables seen by the pass that can be converted if deemed profitable.
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; CHECK-NEXT: 1 jump-table-to-switch - The number of jump tables converted into switches.
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@func_array1 = constant [2 x ptr] [ptr @func0, ptr @func1]
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@func_array2 = constant [2 x ptr] [ptr @func1, ptr @func2]
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define i32 @func0() {
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ret i32 0
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}
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define i32 @func1() {
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ret i32 1
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}
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define i32 @func2() {
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%a = add i32 0, 1
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%b = add i32 %a, 1
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%c = add i32 %b, 1
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%d = add i32 %c, 1
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ret i32 %d
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}
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define i32 @function_gets_converted(i32 %index) {
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%gep = getelementptr inbounds [2 x ptr], ptr @func_array1, i32 0, i32 %index
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%func_ptr = load ptr, ptr %gep
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%result = call i32 %func_ptr()
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ret i32 %result
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}
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define i32 @function_not_converted(i32 %index) {
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%gep = getelementptr inbounds [2 x ptr], ptr @func_array2, i32 0, i32 %index
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%func_ptr = load ptr, ptr %gep
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%result = call i32 %func_ptr()
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ret i32 %result
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}
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