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8a24e83550
Calls with inalloca are lowered by skipping all stores for arguments passed in memory and the initial stack adjustment to allocate argument memory. Now the frontend is responsible for the memory layout, and the backend doesn't have to do any work. As a result these changes are pretty minimal. Reviewers: echristo Differential Revision: http://llvm-reviews.chandlerc.com/D2637 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200596 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.5 KiB
LLVM
55 lines
1.5 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck %s
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%Iter = type { i32, i32, i32 }
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%frame.reverse = type { %Iter, %Iter }
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declare void @llvm.stackrestore(i8*)
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declare i8* @llvm.stacksave()
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declare void @begin(%Iter* sret)
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declare void @plus(%Iter* sret, %Iter*, i32)
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declare void @reverse(%frame.reverse* inalloca align 4)
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define i32 @main() {
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%temp.lvalue = alloca %Iter
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br label %blah
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blah:
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%inalloca.save = call i8* @llvm.stacksave()
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%rev_args = alloca %frame.reverse, inalloca, align 4
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%beg = getelementptr %frame.reverse* %rev_args, i32 0, i32 0
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%end = getelementptr %frame.reverse* %rev_args, i32 0, i32 1
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; CHECK: calll __chkstk
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; CHECK: movl %[[beg:[^,]*]], %esp
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; CHECK: leal 12(%[[beg]]), %[[end:[^ ]*]]
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call void @begin(%Iter* sret %temp.lvalue)
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; CHECK: calll _begin
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invoke void @plus(%Iter* sret %end, %Iter* %temp.lvalue, i32 4)
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to label %invoke.cont unwind label %lpad
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; Uses end as sret param.
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; CHECK: movl %[[end]], (%esp)
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; CHECK: calll _plus
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invoke.cont:
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call void @begin(%Iter* sret %beg)
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; CHECK: movl %[[beg]],
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; CHECK: calll _begin
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invoke void @reverse(%frame.reverse* inalloca align 4 %rev_args)
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to label %invoke.cont5 unwind label %lpad
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invoke.cont5: ; preds = %invoke.cont
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call void @llvm.stackrestore(i8* %inalloca.save)
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ret i32 0
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lpad: ; preds = %invoke.cont, %entry
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%lp = landingpad { i8*, i32 } personality i8* null
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cleanup
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unreachable
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}
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