b6043f9867
Split a virtual register with hint may generate COPY instructions in multiple cold basic blocks, and increase code size. So disable this split when the function is optimized for size.
91 lines
2.7 KiB
LLVM
91 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
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; @foo is optimized for size. Variables %p2, %p3, %p4, %p5 and %p6 are not split
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; in cold blocks.
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define i64 @foo(ptr %ptr, i64 %p2, i64 %p3, i64 %p4, i64 %p5, i64 %p6) optsize {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushq %r15
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: pushq %r14
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; CHECK-NEXT: pushq %r13
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: pushq %r12
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; CHECK-NEXT: .cfi_def_cfa_offset 40
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: .cfi_def_cfa_offset 48
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; CHECK-NEXT: .cfi_offset %rbx, -48
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; CHECK-NEXT: .cfi_offset %r12, -40
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; CHECK-NEXT: .cfi_offset %r13, -32
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; CHECK-NEXT: .cfi_offset %r14, -24
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; CHECK-NEXT: .cfi_offset %r15, -16
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; CHECK-NEXT: movq %r9, %r14
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; CHECK-NEXT: movq %r8, %rbx
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; CHECK-NEXT: movq %rcx, %r12
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; CHECK-NEXT: movq %rdx, %r15
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; CHECK-NEXT: movq %rsi, %r13
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; CHECK-NEXT: testq %rdi, %rdi
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; CHECK-NEXT: je .LBB0_1
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; CHECK-NEXT: # %bb.2: # %if.else
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; CHECK-NEXT: testq %r13, %r13
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; CHECK-NEXT: movq %r15, %rax
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; CHECK-NEXT: je .LBB0_3
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; CHECK-NEXT: .LBB0_4: # %if.end
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; CHECK-NEXT: addq %r13, %rax
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; CHECK-NEXT: addq %r12, %r15
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; CHECK-NEXT: addq %rax, %r15
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; CHECK-NEXT: addq %r14, %rbx
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; CHECK-NEXT: addq %r15, %rbx
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; CHECK-NEXT: movq %rbx, %rax
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: .cfi_def_cfa_offset 40
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; CHECK-NEXT: popq %r12
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: popq %r13
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; CHECK-NEXT: popq %r14
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: popq %r15
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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; CHECK-NEXT: .LBB0_1: # %if.then
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; CHECK-NEXT: .cfi_def_cfa_offset 48
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; CHECK-NEXT: callq bar1@PLT
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; CHECK-NEXT: jmp .LBB0_4
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; CHECK-NEXT: .LBB0_3: # %if.then2
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; CHECK-NEXT: callq bar2@PLT
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; CHECK-NEXT: jmp .LBB0_4
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entry:
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%tobool.not = icmp eq ptr %ptr, null
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br i1 %tobool.not, label %if.then, label %if.else, !prof !5
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if.then: ; preds = %entry
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%call1 = call i64 @bar1()
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br label %if.end
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if.else:
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%cond = icmp eq i64 %p2, 0
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br i1 %cond, label %if.then2, label %if.end, !prof !5
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if.then2:
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%call2 = call i64 @bar2()
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br label %if.end
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if.end:
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%call = phi i64 [ %call1, %if.then ], [%call2, %if.then2], [ %p3, %if.else ]
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%add1 = add i64 %call, %p2
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%add2 = add i64 %add1, %p3
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%add3 = add i64 %add2, %p4
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%add4 = add i64 %add3, %p5
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%res = add i64 %add4, %p6
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ret i64 %res
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}
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!5 = !{!"branch_weights", i32 1, i32 2000}
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declare i64 @bar1()
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declare i64 @bar2()
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