28bda77843
Introduce MCAsmInfo::UsesSetToEquateSymbol to control the preferred syntax for symbol equating. We now favor the more readable and common `symbol = expression` syntax over `.set`. This aligns with pre- https://reviews.llvm.org/D44256 behavior. On Apple platforms, this resolves a clang -S vs -c behavior difference (resolves #104623). For targets whose = support is unconfirmed, UsesSetToEquateSymbol is set to false. This also minimizes test updates. Pull Request: https://github.com/llvm/llvm-project/pull/142289
425 lines
12 KiB
LLVM
425 lines
12 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
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; RUN: opt -S -passes='require<profile-summary>,function(codegenprepare)' %s -mtriple=x86_64-apple-darwin -o - | FileCheck %s --check-prefix OPT
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; Teach CGP to dup returns to enable tail call optimization.
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; rdar://9147433
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define i32 @foo(i32 %x) nounwind ssp {
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; CHECK-LABEL: foo:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: ## kill: def $edi killed $edi def $rdi
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; CHECK-NEXT: decl %edi
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; CHECK-NEXT: cmpl $5, %edi
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; CHECK-NEXT: ja LBB0_8
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; CHECK-NEXT: ## %bb.1: ## %entry
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; CHECK-NEXT: leaq LJTI0_0(%rip), %rax
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; CHECK-NEXT: movslq (%rax,%rdi,4), %rcx
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; CHECK-NEXT: addq %rax, %rcx
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; CHECK-NEXT: jmpq *%rcx
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; CHECK-NEXT: LBB0_2: ## %sw.bb
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; CHECK-NEXT: jmp _f1 ## TAILCALL
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; CHECK-NEXT: LBB0_6: ## %sw.bb7
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; CHECK-NEXT: jmp _f5 ## TAILCALL
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; CHECK-NEXT: LBB0_4: ## %sw.bb3
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; CHECK-NEXT: jmp _f3 ## TAILCALL
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; CHECK-NEXT: LBB0_5: ## %sw.bb5
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; CHECK-NEXT: jmp _f4 ## TAILCALL
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; CHECK-NEXT: LBB0_3: ## %sw.bb1
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; CHECK-NEXT: jmp _f2 ## TAILCALL
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; CHECK-NEXT: LBB0_7: ## %sw.bb9
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; CHECK-NEXT: jmp _f6 ## TAILCALL
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; CHECK-NEXT: LBB0_8: ## %return
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: retq
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; CHECK-NEXT: .p2align 2
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; CHECK-NEXT: .data_region jt32
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; CHECK-NEXT: L0_0_set_2 = LBB0_2-LJTI0_0
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; CHECK-NEXT: L0_0_set_3 = LBB0_3-LJTI0_0
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; CHECK-NEXT: L0_0_set_4 = LBB0_4-LJTI0_0
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; CHECK-NEXT: L0_0_set_5 = LBB0_5-LJTI0_0
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; CHECK-NEXT: L0_0_set_6 = LBB0_6-LJTI0_0
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; CHECK-NEXT: L0_0_set_7 = LBB0_7-LJTI0_0
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; CHECK-NEXT: LJTI0_0:
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; CHECK-NEXT: .long L0_0_set_2
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; CHECK-NEXT: .long L0_0_set_3
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; CHECK-NEXT: .long L0_0_set_4
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; CHECK-NEXT: .long L0_0_set_5
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; CHECK-NEXT: .long L0_0_set_6
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; CHECK-NEXT: .long L0_0_set_7
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; CHECK-NEXT: .end_data_region
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entry:
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switch i32 %x, label %return [
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i32 1, label %sw.bb
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i32 2, label %sw.bb1
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i32 3, label %sw.bb3
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i32 4, label %sw.bb5
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i32 5, label %sw.bb7
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i32 6, label %sw.bb9
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]
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sw.bb: ; preds = %entry
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%call = tail call i32 @f1() nounwind
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br label %return
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sw.bb1: ; preds = %entry
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%call2 = tail call i32 @f2() nounwind
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br label %return
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sw.bb3: ; preds = %entry
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%call4 = tail call i32 @f3() nounwind
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br label %return
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sw.bb5: ; preds = %entry
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%call6 = tail call i32 @f4() nounwind
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br label %return
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sw.bb7: ; preds = %entry
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%call8 = tail call i32 @f5() nounwind
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br label %return
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sw.bb9: ; preds = %entry
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%call10 = tail call i32 @f6() nounwind
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br label %return
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return: ; preds = %entry, %sw.bb9, %sw.bb7, %sw.bb5, %sw.bb3, %sw.bb1, %sw.bb
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%retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], [ %call6, %sw.bb5 ], [ %call4, %sw.bb3 ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ], [ 0, %entry ]
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ret i32 %retval.0
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}
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declare i32 @f1()
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declare i32 @f2()
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declare i32 @f3()
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declare i32 @f4()
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declare i32 @f5()
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declare i32 @f6()
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; rdar://11958338
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%0 = type opaque
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declare ptr @bar(ptr) uwtable optsize noinline ssp
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define hidden ptr @thingWithValue(ptr %self) uwtable ssp {
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; CHECK-LABEL: thingWithValue:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testb %al, %al
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; CHECK-NEXT: je _bar ## TAILCALL
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; CHECK-NEXT: ## %bb.1: ## %someThingWithValue.exit
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; CHECK-NEXT: retq
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entry:
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br i1 poison, label %if.then.i, label %if.else.i
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if.then.i: ; preds = %entry
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br label %someThingWithValue.exit
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if.else.i: ; preds = %entry
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%call4.i = tail call ptr @bar(ptr undef) optsize
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br label %someThingWithValue.exit
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someThingWithValue.exit: ; preds = %if.else.i, %if.then.i
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%retval.0.in.i = phi ptr [ undef, %if.then.i ], [ %call4.i, %if.else.i ]
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ret ptr %retval.0.in.i
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}
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; Correctly handle zext returns.
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declare zeroext i1 @foo_i1()
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define zeroext i1 @zext_i1(i1 %k) {
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; CHECK-LABEL: zext_i1:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testb $1, %dil
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; CHECK-NEXT: je _foo_i1 ## TAILCALL
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; CHECK-NEXT: ## %bb.1: ## %land.end
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: retq
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entry:
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br i1 %k, label %land.end, label %land.rhs
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land.rhs: ; preds = %entry
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%call1 = tail call zeroext i1 @foo_i1()
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br label %land.end
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land.end: ; preds = %entry, %land.rhs
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%0 = phi i1 [ false, %entry ], [ %call1, %land.rhs ]
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ret i1 %0
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}
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; We need to look through bitcasts when looking for tail calls in phi incoming
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; values.
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declare ptr @g_ret32()
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define ptr @f_ret8(ptr %obj) nounwind {
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; OPT-LABEL: @f_ret8(
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; OPT-NEXT: entry:
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; OPT-NEXT: [[CMP:%.*]] = icmp eq ptr [[OBJ:%.*]], null
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; OPT-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[IF_THEN:%.*]]
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; OPT: if.then:
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; OPT-NEXT: [[PTR:%.*]] = tail call ptr @g_ret32()
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; OPT-NEXT: ret ptr [[PTR]]
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; OPT: return:
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; OPT-NEXT: ret ptr [[OBJ]]
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;
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; CHECK-LABEL: f_ret8:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testq %rdi, %rdi
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; CHECK-NEXT: jne _g_ret32 ## TAILCALL
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; CHECK-NEXT: ## %bb.1: ## %return
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; CHECK-NEXT: movq %rdi, %rax
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq ptr %obj, null
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br i1 %cmp, label %return, label %if.then
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if.then:
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%ptr = tail call ptr @g_ret32()
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br label %return
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return:
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%retval = phi ptr [ %ptr, %if.then ], [ %obj, %entry ]
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ret ptr %retval
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}
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define ptr @memset_tailc(ptr %ret_val, i64 %sz) nounwind {
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; CHECK-LABEL: memset_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testq %rdi, %rdi
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; CHECK-NEXT: je LBB4_1
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; CHECK-NEXT: ## %bb.2: ## %if.then
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; CHECK-NEXT: movq %rsi, %rdx
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; CHECK-NEXT: xorl %esi, %esi
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; CHECK-NEXT: jmp _memset ## TAILCALL
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; CHECK-NEXT: LBB4_1: ## %return
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; CHECK-NEXT: movq %rdi, %rax
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq ptr %ret_val, null
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br i1 %cmp, label %return, label %if.then
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if.then:
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tail call void @llvm.memset.p0.i64(ptr nonnull align 1 %ret_val, i8 0, i64 %sz, i1 false)
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br label %return
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return:
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ret ptr %ret_val
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}
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define ptr @memcpy_tailc(ptr %ret_val, i64 %sz, ptr %src) nounwind {
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; CHECK-LABEL: memcpy_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: je LBB5_1
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; CHECK-NEXT: ## %bb.2: ## %if.then
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; CHECK-NEXT: movq %rsi, %rax
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; CHECK-NEXT: movq %rdx, %rsi
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; CHECK-NEXT: movq %rax, %rdx
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; CHECK-NEXT: jmp _memcpy ## TAILCALL
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; CHECK-NEXT: LBB5_1: ## %return
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; CHECK-NEXT: movq %rdx, %rax
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq i64 %sz, 0
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br i1 %cmp, label %return, label %if.then
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if.then:
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tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %ret_val, ptr align 1 %src, i64 %sz, i1 false)
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br label %return
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return:
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%phi = phi ptr [ %ret_val, %if.then ], [ %src, %entry ]
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ret ptr %phi
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}
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define ptr @strcpy_legal_and_baz_illegal(ptr %arg, i64 %sz, ptr %2) nounwind {
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; CHECK-LABEL: strcpy_legal_and_baz_illegal:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: pushq %r15
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; CHECK-NEXT: pushq %r14
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: movq %rdx, %rbx
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; CHECK-NEXT: movq %rsi, %r15
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; CHECK-NEXT: movq %rdi, %r14
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; CHECK-NEXT: movq %rsi, %rdi
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; CHECK-NEXT: callq _malloc
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; CHECK-NEXT: testq %r15, %r15
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; CHECK-NEXT: je LBB6_1
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; CHECK-NEXT: ## %bb.2: ## %if.then
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; CHECK-NEXT: movq %rax, %rdi
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; CHECK-NEXT: movq %rbx, %rsi
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: popq %r14
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; CHECK-NEXT: popq %r15
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; CHECK-NEXT: jmp _strcpy ## TAILCALL
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; CHECK-NEXT: LBB6_1: ## %if.else
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; CHECK-NEXT: movq %r14, %rdi
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; CHECK-NEXT: movq %rbx, %rsi
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; CHECK-NEXT: callq _baz
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; CHECK-NEXT: movq %r14, %rax
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: popq %r14
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; CHECK-NEXT: popq %r15
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; CHECK-NEXT: retq
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entry:
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%strcpy_ret_val = tail call noalias ptr @malloc(i64 %sz)
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%cmp = icmp eq i64 %sz, 0
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br i1 %cmp, label %if.else, label %if.then
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if.then:
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%rv_unused = tail call ptr @strcpy(ptr dereferenceable(1) %strcpy_ret_val, ptr dereferenceable(1) %2)
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br label %return
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if.else:
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%rv_unused_2 = tail call ptr @baz(ptr %arg, ptr %2)
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br label %return
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return:
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%phi = phi ptr [ %strcpy_ret_val, %if.then ], [ %arg, %if.else ]
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ret ptr %phi
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}
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define ptr @baz_illegal_tailc(ptr %ret_val, ptr %arg) nounwind {
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; CHECK-LABEL: baz_illegal_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: movq %rdi, %rbx
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; CHECK-NEXT: testq %rdi, %rdi
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; CHECK-NEXT: je LBB7_2
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; CHECK-NEXT: ## %bb.1: ## %if.then
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; CHECK-NEXT: movq %rbx, %rdi
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; CHECK-NEXT: callq _baz
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; CHECK-NEXT: LBB7_2: ## %return
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; CHECK-NEXT: movq %rbx, %rax
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq ptr %ret_val, null
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br i1 %cmp, label %return, label %if.then
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if.then:
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%rv = tail call ptr @baz(ptr %ret_val, ptr %arg)
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br label %return
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return:
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ret ptr %ret_val
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}
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define ptr @memset_illegal_tailc(ptr %arg, i64 %sz, ptr %ret_val_1, ptr %ret_val_2) nounwind {
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; CHECK-LABEL: memset_illegal_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: movq %rdx, %rax
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: je LBB8_2
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; CHECK-NEXT: ## %bb.1: ## %if.then
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: movq %rcx, %rbx
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; CHECK-NEXT: movq %rsi, %rdx
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; CHECK-NEXT: xorl %esi, %esi
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; CHECK-NEXT: callq _memset
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; CHECK-NEXT: movq %rbx, %rax
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: LBB8_2: ## %return
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq i64 %sz, 0
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br i1 %cmp, label %return, label %if.then
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if.then:
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tail call void @llvm.memset.p0.i64(ptr align 1 %arg, i8 0, i64 %sz, i1 false)
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br label %return
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return:
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%phi = phi ptr [ %ret_val_2, %if.then ], [ %ret_val_1, %entry ]
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ret ptr %phi
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}
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define ptr @strcpy_illegal_tailc(ptr %dest, i64 %sz, ptr readonly returned %src) nounwind {
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; CHECK-LABEL: strcpy_illegal_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: movq %rdx, %rbx
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: je LBB9_2
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; CHECK-NEXT: ## %bb.1: ## %if.then
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; CHECK-NEXT: movq %rbx, %rsi
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; CHECK-NEXT: callq _strcpy
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; CHECK-NEXT: LBB9_2: ## %return
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; CHECK-NEXT: movq %rbx, %rax
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: retq
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entry:
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%cmp = icmp eq i64 %sz, 0
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br i1 %cmp, label %return, label %if.then
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if.then:
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%6 = tail call ptr @strcpy(ptr dereferenceable(1) %dest, ptr dereferenceable(1) %src)
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br label %return
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return:
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ret ptr %src
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}
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@i = global i32 0, align 4
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define i32 @undef_tailc() nounwind {
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; CHECK-LABEL: undef_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: cmpl $0, _i(%rip)
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; CHECK-NEXT: jne _qux ## TAILCALL
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; CHECK-NEXT: ## %bb.1: ## %return
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; CHECK-NEXT: retq
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entry:
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%val = load i32, ptr @i, align 4
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%cmp = icmp eq i32 %val, 0
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br i1 %cmp, label %return, label %if.then
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if.then:
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%rv_unused = tail call i32 @qux()
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br label %return
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return:
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ret i32 undef
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}
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define i32 @undef_and_known_tailc() nounwind {
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; CHECK-LABEL: undef_and_known_tailc:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: movl _i(%rip), %eax
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; CHECK-NEXT: cmpl $5, %eax
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; CHECK-NEXT: je _qux ## TAILCALL
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; CHECK-NEXT: ## %bb.1: ## %entry
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; CHECK-NEXT: cmpl $2, %eax
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; CHECK-NEXT: je _quux ## TAILCALL
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; CHECK-NEXT: ## %bb.2: ## %return
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; CHECK-NEXT: retq
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entry:
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%val = load i32, ptr @i, align 4
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switch i32 %val, label %return [
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i32 2, label %case_2
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i32 5, label %case_5
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]
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case_2:
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%rv_unused = tail call i32 @quux()
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br label %return
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case_5:
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%rv = tail call i32 @qux()
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br label %return
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return:
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%phi = phi i32 [ undef, %case_2 ], [ %rv, %case_5 ], [ undef, %entry ]
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ret i32 %phi
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1)
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1)
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declare noalias ptr @malloc(i64)
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declare ptr @strcpy(ptr noalias returned writeonly, ptr noalias nocapture readonly)
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declare ptr @baz(ptr, ptr)
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declare i32 @qux()
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declare i32 @quux()
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