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from struct byval to registers. We used to pass 0 which means the alignment of PtrVT. Even when the alignment of the struct is smaller than 4, the LOADs would have alignment of 4, and further optimizations could combine the LOADs into a ldm, which would cause crash. The fix is to pass the alignment of the struct byval. rdar://problem/15144402 llvm-svn: 192126
28 lines
1.4 KiB
LLVM
28 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple thumbv7-apple-ios -O1 | FileCheck %s
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; rdar://15144402
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; Make sure we don't assume 4-byte alignment when loading from a byval argument
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; with alignment of 2.
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; CHECK: ldr r1, [r[[REG:[0-9]+]]]
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; CHECK: ldr r2, [r[[REG]], #4]
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; CHECK: ldr r3, [r[[REG]], #8]
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; CHECK-NOT: ldm
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; CHECK: .align 1 @ @sID
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%struct.ModuleID = type { [32 x i8], [32 x i8], i16 }
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@sID = internal constant %struct.ModuleID { [32 x i8] c"TEST\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00", [32 x i8] c"1.0\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00", i16 23 }, align 2
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; Function Attrs: nounwind ssp
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define void @Client() #0 {
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entry:
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tail call void @Logger(i8 signext 97, %struct.ModuleID* byval @sID) #2
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ret void
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}
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declare void @Logger(i8 signext, %struct.ModuleID* byval) #1
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attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind }
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