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https://github.com/c64scene-ar/llvm-6502.git
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6ff59a16a0
of loops. Previously, two consecutive calls to function "func" would result in the following sequence of instructions: 1. load $16, %got(func)($gp) // load address of lazy-binding stub. 2. move $25, $16 3. jalr $25 // jump to lazy-binding stub. 4. nop 5. move $25, $16 6. jalr $25 // jump to lazy-binding stub again. With this patch, the second call directly jumps to func's address, bypassing the lazy-binding resolution routine: 1. load $25, %got(func)($gp) // load address of lazy-binding stub. 2. jalr $25 // jump to lazy-binding stub. 3. nop 4. load $25, %got(func)($gp) // load resolved address of func. 5. jalr $25 // directly jump to func. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191591 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
1016 B
LLVM
35 lines
1016 B
LLVM
; RUN: llc -march=mips < %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: move $[[R1:[0-9]+]], $5
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; CHECK: move $[[R0:[0-9]+]], $4
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; CHECK: ori $6, ${{[0-9]+}}, 3855
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; CHECK: ori $7, ${{[0-9]+}}, 22136
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; CHECK: lw $25, %call16(ff1)
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; CHECK: jalr
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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: 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 $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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