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[IR] Don't assume all functions are 4 byte aligned
In some cases different alignments for function might be used to save space e.g. thumb mode with -Oz will try to use 2 byte function alignment. Similar patch that fixed this in other areas exists here https://reviews.llvm.org/D46110 Differential Revision: https://reviews.llvm.org/D55115 llvm-svn: 348215
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; RUN: opt < %s -constprop -S -o - | FileCheck %s | ||
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; Function Attrs: minsize norecurse nounwind optsize readnone | ||
define dso_local void @foo1() #0 { | ||
entry: | ||
ret void | ||
} | ||
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; Function Attrs: minsize norecurse nounwind optsize readnone | ||
define dso_local void @foo2() align 4 { | ||
entry: | ||
ret void | ||
} | ||
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; Function Attrs: minsize nounwind optsize | ||
define dso_local i32 @main() local_unnamed_addr #1 { | ||
entry: | ||
; CHECK: ptrtoint | ||
%call = tail call i32 bitcast (i32 (...)* @process to i32 (i32)*)(i32 and (i32 ptrtoint (void ()* @foo1 to i32), i32 2)) #3 | ||
; CHECK-NEXT: ptrtoint | ||
%call2 = tail call i32 bitcast (i32 (...)* @process to i32 (i32)*)(i32 and (i32 ptrtoint (void ()* @foo2 to i32), i32 2)) #3 | ||
ret i32 0 | ||
} | ||
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; Function Attrs: minsize optsize | ||
declare dso_local i32 @process(...) local_unnamed_addr #2 | ||
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llvm/test/Assembler/2004-03-07-FunctionAddressAlignment.ll
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