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29c3915faa
The tail call optimization was being used without proper consideration of ABI requirements for saving and restoring the GP. This patch restricts tail call optimization to functions within the same translation unit. Reviewers: vkalintiris Differential Revision: https://reviews.llvm.org/D24763 llvm-svn: 287505
42 lines
1.0 KiB
LLVM
42 lines
1.0 KiB
LLVM
; RUN: llc -march=mipsel -relocation-model=pic -mips-tail-calls=1 < %s | FileCheck %s
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; CHECK-LABEL: foo6:
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; CHECK: %while.body
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; CHECK: lw $25, %call16(foo2)(${{[0-9]+}})
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; CHECK: jalr $25
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; CHECK: %while.end
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define void @foo6(i32 %n) {
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entry:
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%tobool1 = icmp eq i32 %n, 0
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br i1 %tobool1, label %while.end, label %while.body
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while.body: ; preds = %entry, %while.body
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%n.addr.02 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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%dec = add nsw i32 %n.addr.02, -1
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tail call void @foo2()
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%tobool = icmp eq i32 %dec, 0
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br i1 %tobool, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry
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ret void
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}
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declare void @foo2()
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; CHECK-LABEL: foo1:
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; CHECK: lw $25, %call16(foo2)(${{[0-9]+}})
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; CHECK: jalr $25
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; CHECK: lw $25, %call16(foo2)(${{[0-9]+}})
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; CHECK: jalr $25
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; CHECK: lw $25, %call16(foo2)(${{[0-9]+}})
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; CHECK: jalr $25
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define void @foo1() {
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entry:
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tail call void @foo2()
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tail call void @foo2()
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tail call void @foo2()
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ret void
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}
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