23d45e55ed
Previously we wouldn't remove dead copies from basic blocks with successors. The comment said we didn't want to trust the live-in lists. The comment is very old so I'm not sure if that's still a concern today. This patch checks the live-in lists and removes copies from MaybeDeadCopies if they are referenced by any live-ins in any successors. We only do this if the tracksLiveness property is set. If that property is not set, we retain the old behavior.
355 lines
13 KiB
LLVM
355 lines
13 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=x86_64-unknown-unknown -O2 --relocation-model=pic --tls-load-hoist=true -o - %s | FileCheck %s --check-prefix=HOIST0
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; RUN: llc -mtriple=x86_64-unknown-unknown -O2 --relocation-model=pic -o - %s | FileCheck %s --check-prefix=HOIST2
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; This test has no module flag {"tls-load-hoist", i32 0}, so use --tls-load-hoist=x
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; to choose the way of loading thread_local address.
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; This test come from compiling clang/test/CodeGen/intel/tls_loads.cpp with:
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; (clang tls_loads.cpp -fPIC -ftls-model=global-dynamic -O2 -S -emit-llvm)
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$_ZTW5thl_x = comdat any
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$_ZTW6thl_x2 = comdat any
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@thl_x = thread_local global i32 0, align 4
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@thl_x2 = thread_local global i32 0, align 4
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@_ZZ2f2iE2st.0 = internal thread_local unnamed_addr global i8 0, align 4
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@_ZZ2f2iE2st.1 = internal thread_local unnamed_addr global i32 0, align 4
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; For HOIST0, check call __tls_get_addr@PLT only one time for each thread_local variable.
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; For HOIST2, Check the default way: usually call __tls_get_addr@PLT every time when use thread_local variable.
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; Function Attrs: mustprogress uwtable
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define i32 @_Z2f1i(i32 %c) local_unnamed_addr #0 {
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; HOIST0-LABEL: _Z2f1i:
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; HOIST0: # %bb.0: # %entry
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; HOIST0-NEXT: pushq %r15
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; HOIST0-NEXT: .cfi_def_cfa_offset 16
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; HOIST0-NEXT: pushq %r14
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; HOIST0-NEXT: .cfi_def_cfa_offset 24
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; HOIST0-NEXT: pushq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 32
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; HOIST0-NEXT: .cfi_offset %rbx, -32
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; HOIST0-NEXT: .cfi_offset %r14, -24
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; HOIST0-NEXT: .cfi_offset %r15, -16
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; HOIST0-NEXT: movl %edi, %ebx
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: rex64
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; HOIST0-NEXT: callq __tls_get_addr@PLT
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; HOIST0-NEXT: movq %rax, %r14
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; HOIST0-NEXT: testl %ebx, %ebx
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; HOIST0-NEXT: je .LBB0_4
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; HOIST0-NEXT: # %bb.1: # %while.body.preheader
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: leaq thl_x2@TLSGD(%rip), %rdi
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: rex64
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; HOIST0-NEXT: callq __tls_get_addr@PLT
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; HOIST0-NEXT: movq %rax, %r15
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; HOIST0-NEXT: .p2align 4, 0x90
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; HOIST0-NEXT: .LBB0_2: # %while.body
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; HOIST0-NEXT: # =>This Inner Loop Header: Depth=1
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; HOIST0-NEXT: movl (%r15), %edi
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; HOIST0-NEXT: callq _Z6gfunc2i@PLT
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; HOIST0-NEXT: addl (%r14), %eax
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; HOIST0-NEXT: movl %eax, (%r14)
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; HOIST0-NEXT: decl %ebx
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; HOIST0-NEXT: jne .LBB0_2
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; HOIST0-NEXT: jmp .LBB0_3
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; HOIST0-NEXT: .LBB0_4: # %entry.while.end_crit_edge
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; HOIST0-NEXT: movl (%r14), %eax
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; HOIST0-NEXT: .LBB0_3: # %while.end
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; HOIST0-NEXT: popq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 24
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; HOIST0-NEXT: popq %r14
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; HOIST0-NEXT: .cfi_def_cfa_offset 16
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; HOIST0-NEXT: popq %r15
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; HOIST0-NEXT: .cfi_def_cfa_offset 8
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; HOIST0-NEXT: retq
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;
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; HOIST2-LABEL: _Z2f1i:
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; HOIST2: # %bb.0: # %entry
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; HOIST2-NEXT: pushq %rbp
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; HOIST2-NEXT: .cfi_def_cfa_offset 16
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; HOIST2-NEXT: pushq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 24
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; HOIST2-NEXT: pushq %rax
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; HOIST2-NEXT: .cfi_def_cfa_offset 32
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; HOIST2-NEXT: .cfi_offset %rbx, -24
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; HOIST2-NEXT: .cfi_offset %rbp, -16
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; HOIST2-NEXT: testl %edi, %edi
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; HOIST2-NEXT: je .LBB0_4
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; HOIST2-NEXT: # %bb.1:
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; HOIST2-NEXT: movl %edi, %ebx
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; HOIST2-NEXT: .p2align 4, 0x90
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; HOIST2-NEXT: .LBB0_2: # %while.body
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; HOIST2-NEXT: # =>This Inner Loop Header: Depth=1
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x2@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: movl (%rax), %edi
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; HOIST2-NEXT: callq _Z6gfunc2i@PLT
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; HOIST2-NEXT: movl %eax, %ebp
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: addl (%rax), %ebp
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; HOIST2-NEXT: movl %ebp, (%rax)
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; HOIST2-NEXT: decl %ebx
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; HOIST2-NEXT: jne .LBB0_2
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; HOIST2-NEXT: jmp .LBB0_3
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; HOIST2-NEXT: .LBB0_4: # %entry.while.end_crit_edge
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: movl (%rax), %ebp
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; HOIST2-NEXT: .LBB0_3: # %while.end
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; HOIST2-NEXT: movl %ebp, %eax
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; HOIST2-NEXT: addq $8, %rsp
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; HOIST2-NEXT: .cfi_def_cfa_offset 24
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; HOIST2-NEXT: popq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 16
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; HOIST2-NEXT: popq %rbp
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; HOIST2-NEXT: .cfi_def_cfa_offset 8
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; HOIST2-NEXT: retq
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entry:
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%tobool.not3 = icmp eq i32 %c, 0
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br i1 %tobool.not3, label %entry.while.end_crit_edge, label %while.body
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entry.while.end_crit_edge: ; preds = %entry
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%.pre = load i32, ptr @thl_x, align 4
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br label %while.end
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while.body: ; preds = %entry, %while.body
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%c.addr.04 = phi i32 [ %dec, %while.body ], [ %c, %entry ]
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%dec = add nsw i32 %c.addr.04, -1
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%0 = load i32, ptr @thl_x2, align 4
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%call = tail call i32 @_Z6gfunc2i(i32 %0)
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%1 = load i32, ptr @thl_x, align 4
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%add = add nsw i32 %1, %call
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store i32 %add, ptr @thl_x, align 4
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%tobool.not = icmp eq i32 %dec, 0
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br i1 %tobool.not, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry.while.end_crit_edge
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%2 = phi i32 [ %.pre, %entry.while.end_crit_edge ], [ %add, %while.body ]
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ret i32 %2
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}
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declare i32 @_Z6gfunc2i(i32) local_unnamed_addr #1
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; Function Attrs: mustprogress uwtable
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define i32 @_Z2f2i(i32 %c) local_unnamed_addr #0 {
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; HOIST0-LABEL: _Z2f2i:
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; HOIST0: # %bb.0: # %entry
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; HOIST0-NEXT: pushq %r15
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; HOIST0-NEXT: .cfi_def_cfa_offset 16
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; HOIST0-NEXT: pushq %r14
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; HOIST0-NEXT: .cfi_def_cfa_offset 24
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; HOIST0-NEXT: pushq %r12
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; HOIST0-NEXT: .cfi_def_cfa_offset 32
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; HOIST0-NEXT: pushq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 40
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; HOIST0-NEXT: pushq %rax
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; HOIST0-NEXT: .cfi_def_cfa_offset 48
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; HOIST0-NEXT: .cfi_offset %rbx, -40
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; HOIST0-NEXT: .cfi_offset %r12, -32
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; HOIST0-NEXT: .cfi_offset %r14, -24
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; HOIST0-NEXT: .cfi_offset %r15, -16
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; HOIST0-NEXT: movl %edi, %ebx
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: rex64
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; HOIST0-NEXT: callq __tls_get_addr@PLT
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; HOIST0-NEXT: movq %rax, %r14
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; HOIST0-NEXT: testl %ebx, %ebx
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; HOIST0-NEXT: je .LBB1_3
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; HOIST0-NEXT: # %bb.1: # %while.body.preheader
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; HOIST0-NEXT: leaq _ZZ2f2iE2st.0@TLSLD(%rip), %rdi
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; HOIST0-NEXT: callq __tls_get_addr@PLT
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; HOIST0-NEXT: leaq _ZZ2f2iE2st.0@DTPOFF(%rax), %r15
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; HOIST0-NEXT: leaq _ZZ2f2iE2st.1@DTPOFF(%rax), %r12
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; HOIST0-NEXT: .p2align 4, 0x90
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; HOIST0-NEXT: .LBB1_2: # %while.body
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; HOIST0-NEXT: # =>This Inner Loop Header: Depth=1
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; HOIST0-NEXT: callq _Z5gfuncv@PLT
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; HOIST0-NEXT: addl %eax, (%r14)
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; HOIST0-NEXT: callq _Z5gfuncv@PLT
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; HOIST0-NEXT: addb %al, (%r15)
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; HOIST0-NEXT: callq _Z5gfuncv@PLT
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; HOIST0-NEXT: addl %eax, (%r12)
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; HOIST0-NEXT: decl %ebx
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; HOIST0-NEXT: jne .LBB1_2
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; HOIST0-NEXT: .LBB1_3: # %while.end
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; HOIST0-NEXT: movl (%r14), %eax
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; HOIST0-NEXT: addq $8, %rsp
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; HOIST0-NEXT: .cfi_def_cfa_offset 40
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; HOIST0-NEXT: popq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 32
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; HOIST0-NEXT: popq %r12
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; HOIST0-NEXT: .cfi_def_cfa_offset 24
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; HOIST0-NEXT: popq %r14
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; HOIST0-NEXT: .cfi_def_cfa_offset 16
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; HOIST0-NEXT: popq %r15
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; HOIST0-NEXT: .cfi_def_cfa_offset 8
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; HOIST0-NEXT: retq
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;
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; HOIST2-LABEL: _Z2f2i:
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; HOIST2: # %bb.0: # %entry
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; HOIST2-NEXT: pushq %rbp
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; HOIST2-NEXT: .cfi_def_cfa_offset 16
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; HOIST2-NEXT: pushq %r14
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; HOIST2-NEXT: .cfi_def_cfa_offset 24
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; HOIST2-NEXT: pushq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 32
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; HOIST2-NEXT: .cfi_offset %rbx, -32
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; HOIST2-NEXT: .cfi_offset %r14, -24
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; HOIST2-NEXT: .cfi_offset %rbp, -16
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; HOIST2-NEXT: testl %edi, %edi
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; HOIST2-NEXT: je .LBB1_3
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; HOIST2-NEXT: # %bb.1: # %while.body.preheader
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; HOIST2-NEXT: movl %edi, %ebx
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; HOIST2-NEXT: .p2align 4, 0x90
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; HOIST2-NEXT: .LBB1_2: # %while.body
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; HOIST2-NEXT: # =>This Inner Loop Header: Depth=1
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; HOIST2-NEXT: callq _Z5gfuncv@PLT
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; HOIST2-NEXT: movl %eax, %ebp
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: addl %ebp, (%rax)
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; HOIST2-NEXT: callq _Z5gfuncv@PLT
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; HOIST2-NEXT: movl %eax, %ebp
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; HOIST2-NEXT: leaq _ZZ2f2iE2st.0@TLSLD(%rip), %rdi
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: movq %rax, %r14
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; HOIST2-NEXT: addb %bpl, _ZZ2f2iE2st.0@DTPOFF(%rax)
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; HOIST2-NEXT: callq _Z5gfuncv@PLT
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; HOIST2-NEXT: addl %eax, _ZZ2f2iE2st.1@DTPOFF(%r14)
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; HOIST2-NEXT: decl %ebx
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; HOIST2-NEXT: jne .LBB1_2
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; HOIST2-NEXT: .LBB1_3: # %while.end
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: movl (%rax), %eax
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; HOIST2-NEXT: popq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 24
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; HOIST2-NEXT: popq %r14
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; HOIST2-NEXT: .cfi_def_cfa_offset 16
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; HOIST2-NEXT: popq %rbp
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; HOIST2-NEXT: .cfi_def_cfa_offset 8
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; HOIST2-NEXT: retq
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entry:
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%tobool.not9 = icmp eq i32 %c, 0
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br i1 %tobool.not9, label %while.end, label %while.body
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while.body: ; preds = %entry, %while.body
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%c.addr.010 = phi i32 [ %dec, %while.body ], [ %c, %entry ]
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%dec = add nsw i32 %c.addr.010, -1
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%call = tail call i32 @_Z5gfuncv()
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%0 = load i32, ptr @thl_x, align 4
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%add = add nsw i32 %0, %call
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store i32 %add, ptr @thl_x, align 4
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%call1 = tail call i32 @_Z5gfuncv()
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%1 = load i8, ptr @_ZZ2f2iE2st.0, align 4
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%2 = trunc i32 %call1 to i8
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%conv5 = add i8 %1, %2
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store i8 %conv5, ptr @_ZZ2f2iE2st.0, align 4
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%call6 = tail call i32 @_Z5gfuncv()
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%3 = load i32, ptr @_ZZ2f2iE2st.1, align 4
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%add7 = add nsw i32 %3, %call6
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store i32 %add7, ptr @_ZZ2f2iE2st.1, align 4
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%tobool.not = icmp eq i32 %dec, 0
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br i1 %tobool.not, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry
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%4 = load i32, ptr @thl_x, align 4
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ret i32 %4
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}
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declare i32 @_Z5gfuncv() local_unnamed_addr #1
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; Function Attrs: mustprogress uwtable
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define i32 @_Z2f3i(i32 %c) local_unnamed_addr #0 {
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; HOIST0-LABEL: _Z2f3i:
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; HOIST0: # %bb.0: # %entry
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; HOIST0-NEXT: pushq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 16
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; HOIST0-NEXT: .cfi_offset %rbx, -16
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: data16
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; HOIST0-NEXT: rex64
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; HOIST0-NEXT: callq __tls_get_addr@PLT
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; HOIST0-NEXT: movq %rax, %rbx
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; HOIST0-NEXT: movl (%rax), %edi
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; HOIST0-NEXT: callq _Z6gfunc2i@PLT
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; HOIST0-NEXT: movl (%rbx), %edi
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; HOIST0-NEXT: callq _Z6gfunc2i@PLT
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; HOIST0-NEXT: movl $1, %eax
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; HOIST0-NEXT: popq %rbx
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; HOIST0-NEXT: .cfi_def_cfa_offset 8
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; HOIST0-NEXT: retq
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;
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; HOIST2-LABEL: _Z2f3i:
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; HOIST2: # %bb.0: # %entry
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; HOIST2-NEXT: pushq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 16
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; HOIST2-NEXT: .cfi_offset %rbx, -16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: leaq thl_x@TLSGD(%rip), %rdi
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: data16
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; HOIST2-NEXT: rex64
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; HOIST2-NEXT: callq __tls_get_addr@PLT
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; HOIST2-NEXT: movq %rax, %rbx
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; HOIST2-NEXT: movl (%rax), %edi
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; HOIST2-NEXT: callq _Z6gfunc2i@PLT
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; HOIST2-NEXT: movl (%rbx), %edi
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; HOIST2-NEXT: callq _Z6gfunc2i@PLT
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; HOIST2-NEXT: movl $1, %eax
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; HOIST2-NEXT: popq %rbx
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; HOIST2-NEXT: .cfi_def_cfa_offset 8
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; HOIST2-NEXT: retq
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entry:
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%0 = load i32, ptr @thl_x, align 4
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%call = tail call i32 @_Z6gfunc2i(i32 %0)
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%1 = load i32, ptr @thl_x, align 4
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%call1 = tail call i32 @_Z6gfunc2i(i32 %1)
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ret i32 1
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}
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attributes #0 = { nounwind mustprogress uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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attributes #1 = { "frame-pointer"="none" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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attributes #2 = { uwtable "frame-pointer"="none" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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!llvm.module.flags = !{!0, !1, !2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"PIC Level", i32 2}
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!2 = !{i32 7, !"uwtable", i32 1}
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