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transform: optimize range over []byte(string)

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Fixes #2700
This commit is contained in:
Elias Naur
2024-10-14 18:59:07 +02:00
committed by Ayke
parent 45cc5b58cd
commit 539cc5c47b
3 changed files with 19 additions and 3 deletions
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transform/testdata/stringtobytes.ll
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+8
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@@ -5,6 +5,8 @@ target triple = "x86_64--linux"
declare { ptr, i64, i64 } @runtime.stringToBytes(ptr, i64)
declare void @printByte(i8)
declare void @printSlice(ptr nocapture readonly, i64, i64)
declare void @writeToSlice(ptr nocapture, i64, i64)
@@ -17,6 +19,12 @@ entry:
%2 = extractvalue { ptr, i64, i64 } %0, 1
%3 = extractvalue { ptr, i64, i64 } %0, 2
call fastcc void @printSlice(ptr %1, i64 %2, i64 %3)
; print(slice[0])
%indexaddr.ptr1 = extractvalue { ptr, i64, i64 } %0, 0
%4 = getelementptr inbounds i8, ptr %indexaddr.ptr1, i64 0
%5 = load i8, ptr %4, align 1
call fastcc void @printByte(i8 %5)
ret void
}