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https://github.com/c64scene-ar/llvm-6502.git
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4cd53531fd
Previously, fast-isel would not clean up after failing to select a call instruction, because it would have called flushLocalValueMap() which moves the insertion point, making SavedInsertPt in selectInstruction() invalid. Fixing this by making SavedInsertPt a member variable, and having flushLocalValueMap() update it. This removes some redundant code at -O0, and more importantly fixes PR20863. Differential Revision: http://reviews.llvm.org/D5249 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217401 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
2.0 KiB
LLVM
81 lines
2.0 KiB
LLVM
; RUN: llc -fast-isel -O0 -mcpu=generic -mtriple=i386-apple-darwin10 -relocation-model=pic < %s | FileCheck %s
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; This should use flds to set the return value.
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; CHECK-LABEL: test0:
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; CHECK: flds
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; CHECK: retl
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@G = external global float
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define float @test0() nounwind {
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%t = load float* @G
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ret float %t
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}
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; This should pop 4 bytes on return.
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; CHECK-LABEL: test1:
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; CHECK: retl $4
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define void @test1({i32, i32, i32, i32}* sret %p) nounwind {
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store {i32, i32, i32, i32} zeroinitializer, {i32, i32, i32, i32}* %p
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ret void
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}
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; Properly initialize the pic base.
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; CHECK-LABEL: test2:
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; CHECK-NOT: HHH
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; CHECK: call{{.*}}L2$pb
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; CHECK-NEXT: L2$pb:
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; CHECK-NEXT: pop
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; CHECK: HHH
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; CHECK: retl
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@HHH = external global i32
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define i32 @test2() nounwind {
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%t = load i32* @HHH
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ret i32 %t
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}
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; Check that we fast-isel sret, and handle the callee-pops behavior correctly.
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%struct.a = type { i64, i64, i64 }
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define void @test3() nounwind ssp {
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entry:
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%tmp = alloca %struct.a, align 8
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call void @test3sret(%struct.a* sret %tmp)
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ret void
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; CHECK-LABEL: test3:
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; CHECK: subl $44
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; CHECK: leal 16(%esp)
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; CHECK: calll _test3sret
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; CHECK: addl $40
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}
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declare void @test3sret(%struct.a* sret)
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; Check that fast-isel sret works with fastcc (and does not callee-pop)
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define void @test4() nounwind ssp {
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entry:
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%tmp = alloca %struct.a, align 8
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call fastcc void @test4fastccsret(%struct.a* sret %tmp)
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ret void
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; CHECK-LABEL: test4:
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; CHECK: subl $28
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; CHECK: leal (%esp), %ecx
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; CHECK: calll _test4fastccsret
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; CHECK: addl $28
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}
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declare fastcc void @test4fastccsret(%struct.a* sret)
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; Check that fast-isel cleans up when it fails to lower a call instruction.
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define void @test5() {
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entry:
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%call = call i32 @test5dllimport(i32 42)
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ret void
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; CHECK-LABEL: test5:
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; Local value area is still there:
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; CHECK: movl $42, {{%[a-z]+}}
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; Fast-ISel's arg push is not here:
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; CHECK-NOT: movl $42, (%esp)
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; SDag-ISel's arg push:
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; CHECK: movl %esp, [[REGISTER:%[a-z]+]]
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; CHECK: movl $42, ([[REGISTER]])
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; CHECK: movl __imp__test5dllimport
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}
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declare dllimport i32 @test5dllimport(i32)
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