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544f14c6b2
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287505 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; RUN: llc -march=mips -relocation-model=pic -mips-tail-calls=1 < %s | FileCheck %s
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define void @f1(i64 %ll1, float %f, i64 %ll, i32 %i, float %f2) nounwind {
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entry:
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; CHECK-DAG: lw $[[R2:[0-9]+]], 80($sp)
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; CHECK-DAG: lw $[[R3:[0-9]+]], 84($sp)
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; CHECK-DAG: move $[[R1:[0-9]+]], $5
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; CHECK-DAG: move $[[R0:[0-9]+]], $4
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; CHECK-DAG: ori $6, ${{[0-9]+}}, 3855
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; CHECK-DAG: ori $7, ${{[0-9]+}}, 22136
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; CHECK-DAG: lw $25, %call16(ff1)
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; CHECK: jalr $25
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tail call void @ff1(i32 %i, i64 1085102592623924856) nounwind
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; CHECK-DAG: lw $25, %call16(ff2)
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; CHECK-DAG: move $4, $[[R2]]
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; CHECK-DAG: move $5, $[[R3]]
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; CHECK: jalr $25
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tail call void @ff2(i64 %ll, double 3.000000e+00) nounwind
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%sub = add nsw i32 %i, -1
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; CHECK-DAG: lw $25, %call16(ff3)
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; CHECK-DAG: sw $[[R1]], 28($sp)
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; CHECK-DAG: sw $[[R0]], 24($sp)
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; CHECK-DAG: move $6, $[[R2]]
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; CHECK-DAG: move $7, $[[R3]]
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; CHECK: jalr $25
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tail call void @ff3(i32 %i, i64 %ll, i32 %sub, i64 %ll1) nounwind
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ret void
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}
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declare void @ff1(i32, i64)
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declare void @ff2(i64, double)
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declare void @ff3(i32, i64, i32, i64)
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