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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
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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