220 lines
7.3 KiB
LLVM
220 lines
7.3 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc %s -o - -enable-shrink-wrap=true | FileCheck %s --check-prefix=ENABLE
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; RUN: llc %s -o - -enable-shrink-wrap=false | FileCheck %s --check-prefix=DISABLE
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "x86_64--windows-gnu"
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; The output of this function with or without shrink-wrapping
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; shouldn't change.
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; Indeed, the epilogue block would have been if.else, meaning
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; after the pops, we will have additional instruction (jump, mov,
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; etc.) prior to the return and this is forbidden for Win64.
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define i32 @loopInfoSaveOutsideLoop(i32 %cond, i32 %N) #0 {
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; ENABLE-LABEL: loopInfoSaveOutsideLoop:
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; ENABLE: # %bb.0: # %entry
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; ENABLE-NEXT: pushq %rbx
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; ENABLE-NEXT: .seh_pushreg %rbx
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; ENABLE-NEXT: .seh_endprologue
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; ENABLE-NEXT: testl %ecx, %ecx
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; ENABLE-NEXT: je .LBB0_4
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; ENABLE-NEXT: # %bb.1: # %for.preheader
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: nop
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: xorl %eax, %eax
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; ENABLE-NEXT: movl $10, %ecx
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: movl $1, %edx
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: .p2align 4, 0x90
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; ENABLE-NEXT: .LBB0_2: # %for.body
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; ENABLE-NEXT: # =>This Inner Loop Header: Depth=1
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; ENABLE-NEXT: addl %edx, %eax
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; ENABLE-NEXT: decl %ecx
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; ENABLE-NEXT: jne .LBB0_2
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; ENABLE-NEXT: # %bb.3: # %for.end
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: nop
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: shll $3, %eax
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; ENABLE-NEXT: jmp .LBB0_5
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; ENABLE-NEXT: .LBB0_4: # %if.else
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; ENABLE-NEXT: movl %edx, %eax
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; ENABLE-NEXT: addl %edx, %eax
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; ENABLE-NEXT: .LBB0_5: # %if.end
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; ENABLE-NEXT: popq %rbx
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; ENABLE-NEXT: retq
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; ENABLE-NEXT: .seh_endproc
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;
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; DISABLE-LABEL: loopInfoSaveOutsideLoop:
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; DISABLE: # %bb.0: # %entry
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; DISABLE-NEXT: pushq %rbx
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; DISABLE-NEXT: .seh_pushreg %rbx
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; DISABLE-NEXT: .seh_endprologue
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; DISABLE-NEXT: testl %ecx, %ecx
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; DISABLE-NEXT: je .LBB0_4
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; DISABLE-NEXT: # %bb.1: # %for.preheader
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: nop
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: xorl %eax, %eax
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; DISABLE-NEXT: movl $10, %ecx
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: movl $1, %edx
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: .p2align 4, 0x90
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; DISABLE-NEXT: .LBB0_2: # %for.body
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; DISABLE-NEXT: # =>This Inner Loop Header: Depth=1
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; DISABLE-NEXT: addl %edx, %eax
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; DISABLE-NEXT: decl %ecx
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; DISABLE-NEXT: jne .LBB0_2
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; DISABLE-NEXT: # %bb.3: # %for.end
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: nop
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: shll $3, %eax
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; DISABLE-NEXT: jmp .LBB0_5
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; DISABLE-NEXT: .LBB0_4: # %if.else
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; DISABLE-NEXT: movl %edx, %eax
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; DISABLE-NEXT: addl %edx, %eax
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; DISABLE-NEXT: .LBB0_5: # %if.end
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; DISABLE-NEXT: popq %rbx
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; DISABLE-NEXT: retq
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; DISABLE-NEXT: .seh_endproc
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entry:
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%tobool = icmp eq i32 %cond, 0
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br i1 %tobool, label %if.else, label %for.preheader
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for.preheader: ; preds = %entry
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tail call void asm "nop", ""()
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br label %for.body
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for.body: ; preds = %for.body, %for.preheader
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%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
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%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
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%call = tail call i32 asm "movl $$1, $0", "=r,~{ebx}"()
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%add = add nsw i32 %call, %sum.04
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 10
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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tail call void asm "nop", "~{ebx}"()
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%shl = shl i32 %add, 3
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br label %if.end
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if.else: ; preds = %entry
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%mul = shl nsw i32 %N, 1
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br label %if.end
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if.end: ; preds = %if.else, %for.end
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%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
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ret i32 %sum.1
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}
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; When we can sink the epilogue of the function into an existing exit block,
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; this is Ok for shrink-wrapping to kicks in.
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define i32 @loopInfoSaveOutsideLoop2(i32 %cond, i32 %N) #0 {
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; ENABLE-LABEL: loopInfoSaveOutsideLoop2:
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; ENABLE: # %bb.0: # %entry
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; ENABLE-NEXT: testl %ecx, %ecx
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; ENABLE-NEXT: je .LBB1_4
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; ENABLE-NEXT: # %bb.1: # %for.preheader
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; ENABLE-NEXT: pushq %rbx
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; ENABLE-NEXT: .seh_pushreg %rbx
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; ENABLE-NEXT: .seh_endprologue
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: nop
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: xorl %eax, %eax
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; ENABLE-NEXT: movl $10, %ecx
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; ENABLE-NEXT: .p2align 4, 0x90
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; ENABLE-NEXT: .LBB1_2: # %for.body
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; ENABLE-NEXT: # =>This Inner Loop Header: Depth=1
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: movl $1, %edx
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: addl %edx, %eax
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; ENABLE-NEXT: decl %ecx
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; ENABLE-NEXT: jne .LBB1_2
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; ENABLE-NEXT: # %bb.3: # %for.end
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; ENABLE-NEXT: #APP
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; ENABLE-NEXT: nop
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; ENABLE-NEXT: #NO_APP
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; ENABLE-NEXT: shll $3, %eax
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; ENABLE-NEXT: popq %rbx
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; ENABLE-NEXT: retq
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; ENABLE-NEXT: .LBB1_4: # %if.else
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; ENABLE-NEXT: addl %edx, %edx
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; ENABLE-NEXT: movl %edx, %eax
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; ENABLE-NEXT: retq
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; ENABLE-NEXT: .seh_endproc
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;
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; DISABLE-LABEL: loopInfoSaveOutsideLoop2:
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; DISABLE: # %bb.0: # %entry
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; DISABLE-NEXT: pushq %rbx
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; DISABLE-NEXT: .seh_pushreg %rbx
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; DISABLE-NEXT: .seh_endprologue
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; DISABLE-NEXT: testl %ecx, %ecx
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; DISABLE-NEXT: je .LBB1_4
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; DISABLE-NEXT: # %bb.1: # %for.preheader
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: nop
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: xorl %eax, %eax
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; DISABLE-NEXT: movl $10, %ecx
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; DISABLE-NEXT: .p2align 4, 0x90
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; DISABLE-NEXT: .LBB1_2: # %for.body
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; DISABLE-NEXT: # =>This Inner Loop Header: Depth=1
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: movl $1, %edx
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: addl %edx, %eax
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; DISABLE-NEXT: decl %ecx
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; DISABLE-NEXT: jne .LBB1_2
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; DISABLE-NEXT: # %bb.3: # %for.end
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; DISABLE-NEXT: #APP
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; DISABLE-NEXT: nop
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; DISABLE-NEXT: #NO_APP
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; DISABLE-NEXT: shll $3, %eax
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; DISABLE-NEXT: jmp .LBB1_5
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; DISABLE-NEXT: .LBB1_4: # %if.else
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; DISABLE-NEXT: addl %edx, %edx
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; DISABLE-NEXT: movl %edx, %eax
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; DISABLE-NEXT: .LBB1_5: # %if.end
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; DISABLE-NEXT: popq %rbx
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; DISABLE-NEXT: retq
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; DISABLE-NEXT: .seh_endproc
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entry:
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%tobool = icmp eq i32 %cond, 0
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br i1 %tobool, label %if.else, label %for.preheader
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for.preheader: ; preds = %entry
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tail call void asm "nop", ""()
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br label %for.body
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for.body: ; preds = %for.body, %for.preheader
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%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
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%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
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%call = tail call i32 asm sideeffect "movl $$1, $0", "=r,~{ebx}"()
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%add = add nsw i32 %call, %sum.04
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 10
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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tail call void asm "nop", "~{ebx}"()
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%shl = shl i32 %add, 3
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ret i32 %shl
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if.else: ; preds = %entry
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%mul = shl nsw i32 %N, 1
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br label %if.end
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if.end: ; preds = %if.else, %for.end
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ret i32 %mul
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}
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attributes #0 = { uwtable }
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