/
salloc.s
35 lines (32 loc) · 1.21 KB
/
salloc.s
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; ModuleID = 'salloc.c'
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i64:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@stack = global [10000000 x i8] zeroinitializer, align 16
@top = global i64 9999999, align 4
define i8* @salloc(i64 %size) nounwind uwtable {
%1 = alloca i64, align 4
store i64 %size, i64* %1, align 4
%2 = load i64, i64* %1, align 4
%3 = load i64, i64* @top, align 4
%4 = sub nsw i64 %3, %2
store i64 %4, i64* @top, align 4
%5 = load i64, i64* @top, align 4
%6 = add i64 %5, 0
%7 = getelementptr inbounds [10000000 x i8], [10000000 x i8]* @stack, i64 0, i64 %6
ret i8* %7
}
define i8* @spop(i64 %size) nounwind uwtable {
%1 = alloca i64, align 4
%addr = alloca i8*, align 8
store i64 %size, i64* %1, align 4
%2 = load i64, i64* @top, align 4
%3 = add i64 %2, 0
%4 = getelementptr inbounds [10000000 x i8], [10000000 x i8]* @stack, i64 0, i64 %3
store i8* %4, i8** %addr, align 8
%5 = load i64, i64* %1, align 4
%6 = load i64, i64* @top, align 4
%7 = add nsw i64 %6, %5
store i64 %7, i64* @top, align 4
%8 = load i8*, i8** %addr, align 8
ret i8* %8
}