c65b4d64d4
Alignment of an alloca in IR can be lower than the preferred alignment on purpose, but this override essentially treats the preferred alignment as the minimum alignment. The patch changes this behavior to always use the specified alignment. If alignment is not set explicitly in LLVM IR, it is set to DL.getPrefTypeAlign(Ty) in computeAllocaDefaultAlign. Tests are changed as well: explicit alignment is increased to match the preferred alignment if it changes output, or omitted when it is hard to determine the right value (e.g. for pointers, some structs, or weird types). Differential Revision: https://reviews.llvm.org/D135462
36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; RUN: llc -march=mipsel -relocation-model=pic < %s | FileCheck %s -check-prefix=32
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; RUN: llc -march=mips64el -mcpu=mips4 -target-abi=n64 -relocation-model=pic < %s | \
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; RUN: FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips64 -target-abi=n64 -relocation-model=pic < %s | \
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; RUN: FileCheck %s -check-prefix=64
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%struct.S1 = type { [65536 x i8] }
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@s1 = external global %struct.S1
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define void @f() nounwind {
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entry:
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; 32: lui $[[R0:[0-9]+]], 1
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; 32: addiu $[[R0]], $[[R0]], 24
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; 32: subu $sp, $sp, $[[R0]]
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; 32: lui $[[R1:[0-9]+]], 1
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; 32: addu $[[R1]], $sp, $[[R1]]
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; 32: sw $ra, 20($[[R1]])
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; 64: lui $[[R0:[0-9]+]], 1
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; 64: daddiu $[[R0]], $[[R0]], 32
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; 64: dsubu $sp, $sp, $[[R0]]
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; 64: lui $[[R1:[0-9]+]], 1
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; 64: daddu $[[R1]], $sp, $[[R1]]
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; 64: sd $ra, 24($[[R1]])
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%agg.tmp = alloca %struct.S1, align 8
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %agg.tmp, ptr align 1 @s1, i32 65536, i1 false)
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call void @f2(ptr byval(%struct.S1) %agg.tmp) nounwind
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ret void
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}
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declare void @f2(ptr byval(%struct.S1))
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declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture, i32, i1) nounwind
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