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Reduce size of 'StackAlignment' field from 5 to 3 bits. Seriously, who needs a

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2GB-aligned stack anyway? 256 bytes is plenty. Requested by Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96718 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2010-02-21 04:26:06 +00:00
parent 7f6de7df46
commit 89e124b6be
1 changed files with 6 additions and 6 deletions
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12
include/llvm/Attributes.h
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@ -60,11 +60,11 @@ const Attributes NoImplicitFloat = 1<<23; /// disable implicit floating point
const Attributes Naked = 1<<24; ///< Naked function
const Attributes InlineHint = 1<<25; ///< source said inlining was
///desirable
const Attributes StackAlignment = 31<<26; ///< Alignment of stack for
///function (5 bits) stored as log2
///of alignment with +1 bias
///0 means unaligned (different from
///alignstack(1))
const Attributes StackAlignment = 7<<26; ///< Alignment of stack for
///function (3 bits) stored as log2
///of alignment with +1 bias
///0 means unaligned (different from
///alignstack(1))
/// @brief Attributes that only apply to function parameters.
const Attributes ParameterOnly = ByVal | Nest | StructRet | NoCapture;
@ -118,7 +118,7 @@ inline Attributes constructStackAlignmentFromInt(unsigned i) {
return 0;
assert(isPowerOf2_32(i) && "Alignment must be a power of two.");
assert(i <= 0x40000000 && "Alignment too large.");
assert(i <= 0x100 && "Alignment too large.");
return (Log2_32(i)+1) << 26;
}